Free Datasets for Trading and AI Agents
Building trading tools or AI agents? Start here. This is a curated roundup of free and freemium datasets—market data, macro indicators, fundamentals, crypto, energy, agriculture and food, money flows, transport and shipping, research and grey literature, weather, news & RSS feeds, OSINT (public, lawfully published data) and defensive cyber-threat data—all with real free tiers.
Perfect for side projects, prototypes, research, and agents that need reliable data without a budget.
Information and education only. Not financial, investment, legal or tax advice. Listings can be inaccurate, incomplete or out of date and are provided "as is". Free tiers, limits and licenses belong to each provider and can change, so check the provider's own terms before you rely on them. Terms & Disclaimer
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Market Data
Alpha Vantage
REST API for stocks, forex, crypto, and technical indicators.
Free tier: 25 requests/day (unlimited for verified open-source or educational projects); real-time and 15-minute-delayed US data are premium-only
Yahoo Finance
No official public API.
Access: no key or account (Unofficial)
Massive (formerly Polygon.io)
REST and WebSocket APIs for stocks, options, forex, and crypto with fundamentals and market news..
Free tier: Stocks Basic $0: 5 API calls/min, 2 years history, end-of-day data
Tiingo
REST API for stocks, ETFs, crypto, and financial news.
Free tier: Starter ($0): 1,000 requests/day, 50 requests/hour, 500 unique symbols/month, 1 GB bandwidth/month; Internal Use Only. Starter can't store data: Tiingo's terms (updated Oct 6, 2026) bar keeping Tiingo data in any persistent or durable storage on Starter or trial plans; process it in memory only and delete it when the job ends (Terms §1.6(a)).
EODHD (EOD Historical Data)
REST API for end-of-day and intraday prices, fundamentals, news, and macro data across global markets..
Free tier: Free: 20 API calls/day (weighted: 1 per EOD request, 5 per news request), requests per minute: sources conflict (pricing page 20 requests/min, API limits page 1,000 requests/min), 1 year of EOD history, plus 500 one-time welcome bonus calls. Fundamentals and intraday are not included on Free.
Twelve Data
REST and WebSocket API for stocks, forex, crypto, ETFs, and bonds with 100+ technical indicators..
Free tier: Basic (free): 8 API credits/min, 800 credits/day. Credits are weighted by endpoint and number of symbols, so 800 credits can mean fewer than 800 calls.
Finnhub
REST and WebSocket API for stock prices, company fundamentals, estimates, news, and alternative data.
Free tier: 60 calls/min
Alpaca Market Data API
REST and WebSocket API for US stocks, crypto, and options with a free Basic plan.
Free tier: Basic (free): 200 historical API calls/min; real-time = IEX exchange only; 30 WebSocket symbols; history since 2016, but the latest 15 minutes of historical data are restricted; options = indicative feed only
CFTC Commitments of Traders (COT)
Weekly positioning data from the U.S. Commodity Futures Trading Commission: open interest in futures and options-on-futures markets broken down by trader group (commercial vs non-commercial, plus disaggregated and financial-futures categories) for every market where 20 or more traders hold positions at or above the CFTC's reporting levels.
Free tier: Free, no key or signup. No published rate limit; the CFTC says no token is needed as long as you are not overusing the API.
Frankfurter
Free, open-source exchange-rate API: daily mid-market rates for 239 currencies (including legacy codes) from 108 central banks and official sources.
Free tier: Free, no key or signup. No quotas or daily/monthly caps; requests are rate-limited to prevent abuse (no number published).
IEX Exchange HIST
Free T+1 downloads of IEX Exchange's recorded TOPS and DEEP US equities feeds as pcap files: IEX's own trading only, not the consolidated tape.
Free tier: Not stated: IEX lists the HIST files as "Free Download" and gives no download, request or rate limit on its HIST page or terms. The index loaded, and the start of a file downloaded, without a key or login on Oct 27, 2026.
J-Quants API
Japan Exchange Group's J-Quants API: daily prices, valuation indicators, financial summaries and earnings dates for Tokyo Stock Exchange stocks, from JPX Market Innovation & Research.
Free tier: Free plan (¥0): 5 calls/min, 2 years of history delayed by 12 weeks, no CSV download. Registration alone gives sample data; choose a plan for daily data. The free plan is cancelled automatically after one year (re-subscribe allowed).
NYSE Group daily symbol mapping files
NYSE Group (Intercontinental Exchange) publishes daily symbol mapping files on its public FTP site, ftp.nyse.com, as pipe-delimited .txt and .xml for NYSE, NYSE American, NYSE Arca, NYSE National, NYSE Texas and Global OTC, plus NYSE American and NYSE Arca options symbol maps.
Free tier: Free keyless HTTPS directory listings and file downloads on ftp.nyse.com; no account. Usage limits and reuse rights are Not stated on the FTP site.
NYSE Group consolidated short interest
NYSE Group publishes its consolidated short interest report as legacy .xls workbooks on ftp.nyse.com, filed by year and month.
Free tier: Free keyless HTTPS directory listings and file downloads on ftp.nyse.com; no account. Usage limits and reuse rights are Not stated on the FTP site.
NYSE Group daily short sale volume files
NYSE Group publishes daily short sale volume files on ftp.nyse.com for NYSE, NYSE Arca, NYSE American, NYSE Chicago, NYSE National and NYSE Texas, as .txt, .xls, .xml and .pdf.
Free tier: Free keyless HTTPS directory listings and file downloads on ftp.nyse.com; no account. Usage limits and reuse rights are Not stated on the FTP site.
NYSE Group LULD circuit breaker files
NYSE Group publishes daily Limit Up-Limit Down (LULD) trading pause reports as .xls on ftp.nyse.com.
Free tier: Free keyless HTTPS directory listings and file downloads on ftp.nyse.com; no account. Usage limits and reuse rights are Not stated on the FTP site.
NYSE Group SSR circuit breaker files
NYSE Group publishes daily Short Sale Restriction (SSR, Rule 201) circuit breaker reports as .xls on ftp.nyse.com.
Free tier: Free keyless HTTPS directory listings and file downloads on ftp.nyse.com; no account. Usage limits and reuse rights are Not stated on the FTP site.
NYSE MEF Public listing events JSON
NYSE Group posts a small public JSON file, mef_public.json, on ftp.nyse.com with upcoming listing-related events from its Market Event Feed: each result has a type (such as new-listing, new-listed-bond, suspend, stock-split or reverse-stock-split), effective date and timing, published time and security details such as symbol and status.
Free tier: Free keyless HTTPS directory listings and file downloads on ftp.nyse.com; no account. Usage limits and reuse rights are Not stated on the FTP site.
NYSE index options settlement price files
NYSE posts daily index options settlement files on ftp.nyse.com named MSCI_OCC_Index_YYYYMMDD.dat, in year and month folders.
Free tier: Free keyless HTTPS directory listings and file downloads on ftp.nyse.com; no account. Usage limits and reuse rights are Not stated on the FTP site.
LSEG Delayed Market Data (London Stock Exchange, Turquoise, TRADEcho)
London Stock Exchange Group's free MiFID II / MiFIR delayed-data portal: semicolon-delimited CSV files, one per minute, of pre- and post-trade data published 15 minutes after initial publication for London Stock Exchange (XLON), Turquoise (TGHL) and Turquoise Europe (TGHE), plus post-trade files for the TRADEcho UK and EU APAs.
Free tier: Free download of the minute files from dmd.lseg.com; no registration or key (optional email for service notices). Only recent days are listed. No download or request limit stated.
Euronext MiFID II delayed trades files
Euronext's free MiFID II delayed post-trade download service: zipped CSV trade files, at most 15 minutes after initial publication, for Amsterdam, Brussels, Dublin, Lisbon, Milan, Oslo and Paris, by asset class (equities, ETFs and funds, warrants and certificates, fixed income, equity and index derivatives, commodity derivatives).
Free tier: Free CSV (zipped) downloads with no registration or key; files available for at least 24 hours after publication. No download or request limit stated.
Deutsche Börse MiFID II delayed data (Xetra, Börse Frankfurt, Eurex)
Deutsche Börse Group's free MiFIR Art. 13(1) delayed-data file service: gzipped JSON files, one per minute, of pre- and post-trade market data 15 minutes after creation for Xetra, Börse Frankfurt (including certificates and warrants), Tradegate, Eurex and EEX.
Free tier: Free gzipped JSON minute files with no registration or key; files kept until midnight of the following business day. No download or request limit stated.
JPX List of TSE-listed Issues
Japan Exchange Group's monthly Excel list of every issue listed on the Tokyo Stock Exchange as of the previous month-end: local code, English name, market section or product type, 33- and 17-sector codes and TOPIX size bucket.
Free tier: Free Excel download (English data_e.xlsx and Japanese data_j.xlsx, about 260 KB) with no registration or key; one file per month, latest only. No download limit stated.
Macro
FRED (Federal Reserve Economic Data)
REST API from the Federal Reserve Bank of St. Louis covering economic indicators and financial time series..
Free tier: Free with API key. v1: 120 requests/minute; v2 bulk release observations: 2 requests/second
World Bank Open Data
Official World Bank Indicators API (V2, https://api.worldbank.org/v2): nearly 16,000 development and macro time-series indicators from over 45 databases, including World Development Indicators for 217 economies and more than 40 country groups.
Free tier: Not stated (free, no API key; 50 results per page by default)
U.S. Bureau of Labor Statistics (BLS) Public Data API
Official REST API from the U.S. Bureau of Labor Statistics for inflation, employment, and wage data.
Free tier: Version 1.0 is unregistered: 25 queries/day, up to 25 series and 10 years per query. Version 2.0 requires registration and a registration key (email and organization name; renew at least once a year): 500 queries/day, up to 50 series and 20 years per query, plus net/percent changes, optional annual averages and series description information.
U.S. Treasury Fiscal Data API
Official open API from the U.S. Treasury's Bureau of the Fiscal Service: federal debt, daily cash and debt operations, receipts and outlays, average interest rates on Treasury securities, auction data and the Treasury's reporting exchange rates for foreign currencies.
Free tier: Free, no API key, account or registration ("it does not require a user account or registration for a token"). No published rate limit; 100 rows per page by default.
Bank of Canada Valet API
Official Bank of Canada API for daily exchange rates, interest rates, bond yields and other financial and economic statistics.
Free tier: Free, no key or registration. No published numeric rate limit; the Bank asks users to back off on errors and cache daily data.
EIA Open Data
U.S. Energy Information Administration's open data: electricity, natural gas, petroleum, coal, nuclear outages and energy outlooks through an API (free key) and bulk files (no key).
Free tier: Free API key (name, email and category; EIA emails the key). Bulk files need no key. The API returns at most 5,000 rows per JSON request (300 for XML). No numeric request limit stated.
Eurostat API (EU statistics)
Official EU statistics through Eurostat's dissemination API, including inflation, labor, population, trade, industry, government finance and regional series.
Free tier: Free, no key. Response-size and request-rate numbers are not stated on the pages read.
ECB Data Portal API (SDMX)
ECB statistical data and metadata through an SDMX 2.1 REST service.
Free tier: Public API requests need no key. The pages read state no numeric response or request allowance.
Bank of England Database (IADB)
Official Bank of England time series, including Bank Rate, interest and exchange rates and other UK monetary and banking statistics, with parameterized CSV downloads for series codes and date ranges..
Free tier: No key. CSV URL accepts up to 300 comma-separated series codes in one request. The demonstrated range contains one daily series.
Crypto
CoinGecko
REST and WebSocket API covering crypto assets, DEX data, and 12+ years of historical market data..
Free tier: Demo (free key): 100 calls/min, 10,000 calls/month, 1 year of daily and hourly history, attribution required, no commercial license. Keyless (no key): ~10–30 calls/min shared per IP, not for production.
CoinMarketCap
REST and WebSocket API for crypto and DEX market data.
Free tier: 15,000 call credits/mo
Binance API
REST and WebSocket APIs for spot, futures, and margin trading on Binance.
Free tier: Public market data needs no API key. Weight-based limits per IP (6,000 weight/min). Not available from restricted locations, including the US (api.binance.com returns HTTP 451). Binance.US is a separate service with its own terms, and it isn't available in every US state (supported states: https://support.binance.us/en/articles/9842798-list-of-supported-and-unsupported-states-and-regions).
Fundamentals
SimFin
REST API providing fundamental data with calculated ratios and metrics.
Free tier: Free plan $0: 5 years fundamentals history, 500 high-speed credits
SEC EDGAR APIs
Official SEC REST/JSON APIs for filing history and XBRL financial data.
Free tier: Max 10 requests/second per user (across all machines); declare a User-Agent with company name and contact email, e.g. 'Sample Company Name AdminContact@example.com'
Financial Modeling Prep
REST API for financial statements, stock prices, analyst estimates, and market data.
Free tier: Basic ($0): 250 calls/day, 500 MB bandwidth per trailing 30 days, end-of-day data only, up to 5 years of history; most stock endpoints limited to ~87 sample US symbols
Academic Data
Kenneth French Data Library
Free downloadable CSV/TXT files of Fama-French factor returns and research portfolios.
Free tier: No key or account; direct TXT/CSV zip downloads. No rate limit stated.
Alternative Data
Nasdaq Data Link
Nasdaq's data platform for financial, economic and alternative datasets, delivered by API with Python, R, Excel and SQL tools.
Free tier: Free account + API key: 300 calls/10 seconds, 2,000 calls/10 minutes, 50,000 calls/day, 1 concurrent call; Tables API returns up to 10,000 rows per call. Free data is mainly sample data from premium products: all 206 catalog products were labeled Premium on Oct 20, 2026.
Kaggle Datasets
Community-uploaded datasets for machine learning and research.
Access: free API key
GDELT 2.0 (Global news events and tone)
Open global news-event database from the GDELT Project: events, article mentions and a knowledge graph of people, organizations, places, themes and tone, extracted from news worldwide and published as free raw files every 15 minutes.
Free tier: Free, no key or account. Raw 15-minute files: no published rate limit. DOC 2.0 search API: one request every 5 seconds (GDELT's own limit message).
Wikimedia Pageviews
Free, official page-view counts for Wikipedia and other Wikimedia projects from the Wikimedia Analytics API: daily or monthly views for a single article, plus project-wide totals.
Free tier: Free, no API key. A descriptive User-Agent header with contact details is required; clients without one "may be blocked without notice".
Energy
BOEM Offshore Energy Data Center
The BOEM Data Center publishes keyless fixed-width and delimited ZIP files for offshore leases, pipelines, platforms, wells, production and companies, with separate record layouts and code definitions.
Free tier: Keyless ZIP downloads are available for the checked ASCII file families. BOEM also notes that some separate files can be purchased on physical media.
CER Pipeline Incident Data
Canada Energy Regulator CSV data describes reported pipeline incidents and includes a separate data dictionary.
Free tier: Keyless comprehensive-data and dictionary CSV downloads. No file-size or download quota is stated.
CER Pipeline Throughput and Capacity
Canada Energy Regulator CSV files report throughput and capacity at key points on regulated oil, liquids and natural-gas pipelines.
Free tier: Keyless CSV downloads. No file-size or download quota is stated.
Ember Data API
Ember exposes yearly and monthly electricity generation, demand, power-sector emissions, carbon intensity and monthly installed capacity through a JSON REST API.
Free tier: A free email-verified API key provides access to the documented yearly and monthly dataset endpoints.
Fraunhofer ISE Energy-Charts API
Fraunhofer ISE's Energy-Charts API serves public electricity production, forecasts, installed power, frequency, cross-border trading and physical flows, renewable shares and selected price data as JSON.
Free tier: Keyless public endpoints use per-IP, per-endpoint token buckets. Higher-limit commercial access is available by contacting Fraunhofer ISE.
EPA eGRID
EPA eGRID is an Excel collection of U.S. power-plant, generator, unit and regional electricity data, including generation, fuel mix, emissions, heat input and emission rates.
Free tier: The current and historical Excel files are free keyless downloads. No file-download quota is stated.
ERCOT Public Data API
ERCOT's authenticated JSON API exposes its catalog of public Texas electricity-market reports and report artifacts, including load, generation, outages, forecasts, prices, constraints and ancillary services.
Free tier: A registered user can subscribe for a key and request an ID token valid for one hour. Historic-file downloads are capped at 1,000 files at once; the Data Access Portal permits the same report to be downloaded no more than three times in 12 months, after which stored copies should be reused.
EU Weekly Oil Bulletin
The European Commission publishes downloadable Excel workbooks of weekly consumer prices for petroleum products across EU countries, both with and without duties and taxes.
Free tier: Keyless downloads of the current and historical Excel workbooks. No file-size or query cap is stated.
GIE AGSI Gas Storage API
Gas Infrastructure Europe’s AGSI REST API returns daily European underground-gas-storage data as JSON.
Free tier: Free API after mandatory registration. Responses default to 30 records per page and accept at most 300; only daily storage inventory data currently available on the platform is exposed.
GIE ALSI LNG API
Gas Infrastructure Europe’s ALSI REST API returns daily European LNG-terminal data as JSON.
Free tier: Free API after mandatory registration. Responses default to 30 records per page and accept at most 300; only daily LNG inventory data currently available on the platform is exposed.
Global Energy Monitor Coal Plant Tracker
Global Energy Monitor publishes a spreadsheet of coal-fired generating units with plant and parent owners, status, plant and coal type, gross capacity, coordinates and calculated carbon-dioxide measures.
Free tier: The download form provides the spreadsheet after required name, email, organization, sector and use-case (at least 100 characters) fields and acceptance of the CC BY 4.0 licence; country is optional and no account or key is stated.
Global Energy Monitor Gas Infrastructure
Global Energy Monitor publishes project-level gas transmission pipeline and LNG import/export terminal data as Excel, GeoJSON, GeoPackage and shapefile downloads.
Free tier: The download form provides the files after required name, email, organization, sector and use-case (at least 100 characters) fields and acceptance of the CC BY 4.0 licence; country is optional and no account or key is stated.
Global Energy Monitor Oil Infrastructure
Global Energy Monitor publishes project-level crude-oil and natural-gas-liquids transmission pipelines as Excel files, with routes supplied separately in GeoJSON and GeoPackage.
Free tier: The download form provides the files after required name, email, organization, sector and use-case (at least 100 characters) fields and acceptance of the CC BY 4.0 licence; country is optional and no account or key is stated.
NESO Open Data Portal API
The National Energy System Operator exposes Great Britain electricity datasets and resource metadata through a keyless CKAN action API, with CSV and other resource downloads linked from dataset records.
Free tier: Keyless access to public CKAN metadata and linked public resources. Dataset-level licence and access fields govern individual resources.
DESNZ UK Energy Trends Tables
The UK Department for Energy Security and Net Zero publishes Energy Trends tables as Excel and OpenDocument spreadsheets covering coal, oil, gas, electricity, renewables and total energy supply and demand.
Free tier: Keyless public Excel and OpenDocument downloads. No download cap is stated.
WRI Global Power Plant Database
WRI's Global Power Plant Database is a keyless ZIP and CSV inventory of thermal and renewable generating plants with coordinates, capacity, fuel, owner, commissioning year and annual generation fields.
Free tier: Version 1.3.0 is a complete keyless ZIP download. No download quota is stated.
Agriculture & Food
AAFC Annual Crop Inventory
Agriculture and Agri-Food Canada publishes annual crop and land-cover classifications as GeoTIFF files and ArcGIS ImageServer services, with pixel class codes, labels, colours and service metadata.
Free tier: Keyless GeoTIFF directories, classification CSV and ArcGIS ImageServer endpoints; no free-access query or download cap is stated.
Copernicus Global NDVI 300 m v3
Copernicus Land Monitoring Service provides global 300 m Normalised Difference Vegetation Index rasters every ten days, with NDVI values representing vegetation greenness and product metadata available through the CDSE OData catalogue.
Free tier: Keyless OData catalogue search; raster downloads require a free CDSE account and token. General-user S3/OData/STAC quotas include 2,000 requests per minute, four concurrent connections and 12 TB transferred over a rolling 30 days, after which transfer is slowed.
EU Agri-food Data Portal API
The European Commission's Agri-food Data API returns JSON market data for EU agricultural prices, production, trade and reference dimensions, with 116 paths in the checked OpenAPI document.
Free tier: Public JSON GET endpoints without a key. The gateway can return 429 or 503, but no numeric quota is published.
FAO FAOSTAT API and bulk downloads
FAOSTAT provides agricultural production, trade, prices, land, inputs, food-security and other official statistics through a JSON/CSV API and zipped CSV bulk files.
Free tier: Bulk catalog and files are public and keyless. The API developer portal describes JSON and CSV output; no free-tier quota is stated.
JRC AGRI4CAST Resources Portal
The JRC AGRI4CAST portal publishes MARS crop-monitoring resources including gridded agro-meteorology, vegetation indicators, crop areas, subnational crop statistics, irrigation and crop calendars.
Free tier: Nine open public resources were returned by the checked portal session. Static files are direct downloads; tailored resources allow spatial, temporal and parameter selection.
Statistics Canada Fertilizer Shipments
Statistics Canada table 32-10-0039-01 provides annual cumulative fertilizer shipments to Canadian agriculture markets as CSV in a bulk ZIP, with geography, nutrient, fertilizer-year period, metric-tonne value, status and vector fields.
Free tier: The complete table and metadata are available as a keyless bulk ZIP; no free-access size or row cap is stated.
Statistics Canada Retail Food Prices
Statistics Canada table 18-10-0245-01 provides monthly average retail prices for 110 food products in a bulk CSV ZIP, with reference month, geography, product and package size, Canadian-dollar value, status and vector fields.
Free tier: The complete table and metadata are available as a keyless bulk ZIP; no free-access size or row cap is stated.
USDA ERS ARMS Data API
USDA ERS exposes Agricultural Resource Management Survey farm financial and structural estimates through REST and GraphQL endpoints in JSON.
Free tier: A valid email address is required for a free data.gov API key. ERS does not state a query-size cap on the checked ARMS documentation.
USDA ERS Feed Grains Database
USDA ERS publishes a machine-readable CSV and Excel workbook of feed-grain supply, use, trade, prices, acreage, production, feed ratios and related series.
Free tier: The complete all-years CSV and XLSX downloads are keyless. No file-download quota is stated.
USDA ERS Fertilizer Use and Price
USDA ERS provides a single Excel workbook of annual U.S. fertilizer consumption, product and nutrient use, farm prices, price indexes, and crop-by-State application shares and rates.
Free tier: One keyless XLS workbook contains all 32 tables and was listed as 785.5 KB. No download quota is stated.
USDA ERS Food Price Outlook
USDA ERS publishes CSV and XLSX files for food Consumer Price Index and Producer Price Index changes, forecasts, intervals, and prior forecast vintages.
Free tier: Current, historical and archived CSV/XLSX files are keyless; the largest listed historical CSV was 2.03 MB. No download quota is stated.
USDA ERS Farm-to-Consumer Price Spreads
USDA ERS publishes separate CSV and XLSX files comparing retail food prices with farm values for dairy, fruit, vegetables, juice and field-crop foods and market baskets.
Free tier: Individual current CSV/XLSX files and archived ZIP files are keyless. No download quota is stated.
USDA ESMIS WASDE releases
USDA World Agricultural Supply and Demand Estimates releases indexed by the keyless ESMIS JSON API and downloadable as XML, XLS, text and PDF for recent vintages.
Free tier: The read-only ESMIS API and linked WASDE release files are keyless. API result sets are paginated at 25 items per page by default.
USDA FAS Export Sales Reporting API
USDA FAS Export Sales Reporting data on U.S. agricultural export sales, exposed as JSON or XML through commodity, country, unit and release-date endpoints.
Free tier: A free api.data.gov key allows access to ESR lookup, release-date and export-data endpoints. No numeric call allowance is stated on the FAS portal.
USDA FAS Global Agricultural Trade API
USDA FAS Global Agricultural Trade System data for U.S. Census trade and UN Comtrade, returned as JSON or XML through import, export and re-export endpoints.
Free tier: A free api.data.gov key allows access to GATS lookup, release-date and trade-data endpoints. No numeric call allowance is stated on the FAS portal.
USDA FAS Production, Supply & Distribution
USDA FAS official production, supply and distribution forecasts for key agricultural commodities, returned by a JSON or XML API.
Free tier: A free api.data.gov key allows access to the PSD lookup, release-date and forecast-data endpoints. No numeric call allowance is stated on the FAS portal.
USDA NASS Cropland Data Layer
Annual USDA NASS crop-specific land-cover rasters distributed in zipped GeoTIFF and Cloud-Optimized GeoTIFF packages, with metadata, class codes and confidence products for some years.
Free tier: Keyless file downloads. National archives are large: the 2025 10-meter CDL is 9.8 GB compressed and its 30-meter resample is 1.9 GB; newer 10-meter confidence layers are viewer-only because of their size.
USDA NASS Quick Stats API and bulk files
USDA NASS agricultural estimates from surveys and the Census of Agriculture, exposed as JSON, CSV or XML through Quick Stats and as compressed tab-delimited bulk files.
Free tier: The free API key permits Quick Stats requests returning up to 50,000 records each. Keyless compressed bulk files cover subject sectors and Census releases.
USGS Mineral Commodity Summaries 2026
USGS's 2026 release supplies CSV tables for more than 90 nonfuel minerals, including fertilizer inputs such as potash and phosphate rock, with U.S. production, trade, prices, stocks, consumption, import reliance and world production fields.
Free tier: All attached release tables and metadata are keyless downloads; no free-access size or query cap is stated.
World Bank Commodity Markets Pink Sheet
The World Bank Pink Sheet provides monthly and annual nominal commodity prices plus commodity price indices in Excel workbooks.
Free tier: Keyless Excel downloads for monthly and annual historical data. No file-download quota is stated.
Money Flows
Banco de España Statistics API
Banco de España JSON web service for the statistical series published on its Statistics site and in HERMES.
Free tier: Public keyless JSON requests; no query quota stated. Range options depend on series frequency.
Banque de France Webstat API
Banque de France Webstat request API for economic, monetary, financial, international and rate series.
Free tier: Free registration and API key; 10,000 requests per user account per day.
U.S. BEA Data API
U.S. Bureau of Economic Analysis national, regional, industry and international economic accounts through a request-response API.
Free tier: A free registered key provides API access. Standard quotas are 100 requests per minute, 100 MB retrieved per minute and 30 errors per minute.
BIS Data Portal SDMX API
Bank for International Settlements statistics on banking, credit, debt securities, derivatives, property prices, exchange rates and central-bank indicators through an SDMX REST API.
Free tier: Free keyless access to API-accessible BIS statistics. Dataset coverage, frequency and response size depend on the selected dataflow.
Deutsche Bundesbank SDMX API
Deutsche Bundesbank macroeconomic and real-time time series plus structural metadata through a REST API.
Free tier: Free keyless access. SDMX CSV supports at most 200 time series per plain response; broader or mixed-frequency CSV output is delivered as ZIP.
CFTC Weekly Swaps Report
CFTC weekly aggregate swap-market tables covering gross notional outstanding, transaction dollar volume and ticket volume by asset class, product, cleared status, participant type, currency, tenor or grade.
Free tier: Keyless current HTML tables and date-indexed archive pages. Current all-swaps reports display five weeks; asset-class reports display one week.
FDIC BankFind Suite API and Bulk Data
FDIC BankFind Suite publishes U.S. bank institution, branch, structural-change, failure, deposit, financial, summary and demographic data through a JSON or CSV API and bulk CSV downloads.
Free tier: Public API queries and institution or location bulk CSV files without a key. No suite-wide response cap is stated on the checked pages.
Fed Distributional Financial Accounts
Quarterly estimates of U.S. household wealth levels and shares by wealth, income, age, generation, education and race, with assets, liabilities and net-worth components allocated from the Financial Accounts using Survey of Consumer Finances distributions.
Free tier: The complete keyless CSV ZIP was 895,897 bytes when checked and contained 27 files. No download cap is stated.
FFIEC Call Reports Bulk Data
FFIEC Central Data Repository bulk Call Report files for all commercial banks, offered as tab-delimited, Excel-compatible data or XBRL.
Free tier: Keyless bulk downloads by product, reporting period and available format. The separate Public Web Service requires an account.
HKMA Open API
Hong Kong Monetary Authority JSON APIs for market statistics, banking and stored-value-facility information, financial-market infrastructure, releases and other HKMA publications.
Free tier: All checked Open API documentation is free without application, registration or certification. No response cap is stated on the checked pages.
Norges Bank Open Data API
Norges Bank REST API for exchange rates, interest rates, government debt, banking-system liquidity and Regional Network survey series.
Free tier: Public REST queries and file-format exports without an account or key; no query-size cap stated.
New York Fed Markets Data API
Public REST data for New York Fed reference rates, Desk operations, SOMA holdings, primary-dealer statistics and related market activity, with dates, rates, volumes, operation amounts and instrument details in endpoint-specific responses.
Free tier: Keyless public API access. Endpoint-specific validation applies; no unified request or response cap is stated.
New York Fed Household Debt and Credit
Federal Reserve Bank of New York quarterly household debt and credit workbooks based on the New York Fed Consumer Credit Panel/Equifax.
Free tier: Public quarterly Excel workbooks and a separate 1999-2003 workbook without an account or key.
Sveriges Riksbank SWEA API
Sveriges Riksbank REST API for published interest rates and exchange rates, including series metadata, observations, groups, aggregates and calculated cross-rates.
Free tier: Anonymous: 5 calls per minute and 1,000 calls per day. Registered API key: 200 calls per minute and 30,000 calls per week, except the two group-observation methods noted by the provider.
UNCTAD Data Hub FDI Statistics
UN Trade and Development annual foreign-direct-investment statistics covering inward and outward flows and stocks by economy and group.
Free tier: Free access with no registration required; selected data can be saved as CSV and entire tables can be downloaded through the bulk-files control.
U.S. Treasury USAspending API
U.S. Treasury data on federal awards and account-level spending, including contracts, grants, loans, recipients, agencies, locations, obligations and outlays.
Free tier: Keyless access to public API endpoints. Award searches accept dates from 2007-10-01; the API directs older requests back to 2000-10-01 to custom, download or bulk-download routes.
World Bank Remittance Flows Datasets
World Bank annual inward and outward remittance-flow tables by economy in Excel workbooks.
Free tier: Two public Excel workbooks, one for inward and one for outward flows; no key or account required.
Transport & Shipping
BTS Transportation Services Index
The Bureau of Transportation Statistics publishes a monthly U.S. Transportation Services Index plus seasonally adjusted modal inputs through a keyless JSON and CSV API.
Free tier: Keyless public JSON and CSV API plus full export. Provider query and usage quotas were not stated.
BTS TranStats
The Bureau of Transportation Statistics' TranStats portal provides downloadable tables from U.S. aviation and other federal transportation data systems.
Free tier: Keyless selective CSV downloads and pre-zipped monthly files. Very large tables can omit all-period or all-geography choices, and complete multi-year downloads may require contacting TranStats support.
FAA NAS Status airport API
The Federal Aviation Administration's NAS Status endpoint returns a keyless XML snapshot of airport traffic-management events.
Free tier: Keyless access to the current XML snapshot. No historical endpoint, storage cap or numeric request allowance is stated.
FHWA National Bridge Inventory
The Federal Highway Administration publishes National Bridge Inventory records as Excel, JSON and GeoJSON, with older ASCII and bridge-element XML archives.
Free tier: Keyless state-level and nationwide downloads. The 2026 nationwide Excel option is a ZIP of state workbooks because of Excel size limits; JSON and GeoJSON are also offered.
Fintraffic Digitraffic Transport APIs
Fintraffic's Digitraffic services expose Finnish road conditions and disruptions, railway timetables and train movements, and maritime AIS, port-call, winter-navigation, sea-state and aid-to-navigation data.
Free tier: Public road, rail and marine REST, GraphQL and MQTT services need no account or key. A Digitraffic-User header identifies the application and raises request allowances above the anonymous limits.
FRA rail safety data
Federal Railroad Administration records combine reportable rail-equipment accidents with current and historical highway-rail crossing inventory data, exposed as JSON and CSV through the DOT data portal.
Free tier: Keyless public API and file export. The ingestion example deliberately limits each API query to 5,000 rows; provider rate and query caps were not stated.
MarineCadastre AIS Vessel Transit Data
MarineCadastre publishes keyless annual GeoTIFF rasters derived from AIS broadcasts that count vessel transits in U.S. coastal waters.
Free tier: Annual GeoTIFF transit-count files are direct, keyless downloads; the checked files are 284.48 MB to 534.46 MB each.
Network Rail open data feeds
Network Rail's account-gated operational feeds cover train schedules, movement and signalling positions, locations, public performance, temporary speed restrictions and infrastructure.
Free tier: A free account is required. Access is first-come, first-served and currently restricted to 1,000 users.
NGA World Port Index
NGA's World Port Index describes worldwide ports, shipping facilities and oil terminals with locations, physical characteristics, facilities and services.
Free tier: Public name indexes and query/download tools are available without an account or key.
NOAA CO-OPS Data API
NOAA's CO-OPS API serves observations and predictions for water levels, tides, currents, air gap and coastal meteorological or oceanographic conditions.
Free tier: Free keyless API access subject to product and interval query-span caps: four days to 200 years per request depending on interval.
New York Fed GSCPI
The Federal Reserve Bank of New York's Global Supply Chain Pressure Index combines transportation costs and manufacturing indicators into a monthly gauge of global supply-chain conditions.
Free tier: Keyless CSV and Excel downloads with no stated row, download or storage cap. Automated access must not disable, damage or interfere with the website.
ORR rail statistics data portal
The Office of Rail and Road portal publishes Great Britain rail statistics for passenger and freight usage, performance, fares, finance, safety, accessibility, infrastructure, environment and stations.
Free tier: Public table pages and browser-generated CSV, JSON and XLSX downloads are keyless. No download allowance was stated.
OurAirports open airport data
OurAirports publishes worldwide airport, runway, radio-frequency, navaid, country and region data as UTF-8 CSV files.
Free tier: Keyless full CSV downloads for airports, frequencies, comments, runways, navaids, countries and regions. No row, storage or reuse cap is stated.
Statistics Canada railway carloadings
Statistics Canada table 23-10-0216-01 provides monthly Canadian railway loadings as a compressed CSV table and through the Web Data Service.
Free tier: Full-table CSV and Web Data Service access are public without registration. No row allowance or usage quota was stated.
UNCTADstat Maritime Indicators
UN Trade and Development provides keyless bulk tables for merchant fleets, seaborne trade, port calls, container throughput and liner-shipping connectivity.
Free tier: Data access is free without registration; selected data can be saved as CSV and complete tables can be downloaded as bulk files.
USACE National Inventory of Dams
The U.S. Army Corps of Engineers publishes National Inventory of Dams records through a public REST API and nationwide CSV and GeoPackage downloads.
Free tier: Public REST endpoints and national CSV or GeoPackage downloads need no key. The checked national CSV was about 69 MB and contained 92,692 records.
Singapore MPA maritime statistics
The Maritime and Port Authority of Singapore publishes monthly vessel-arrivals and bunker-sales statistics on data.gov.sg, queryable keylessly through the CKAN datastore_search API or downloadable as CSV.
Free tier: The CKAN datastore_search API is free and keyless; a real call on 2026-11-05 returned 3,048 rows for the vessel-arrivals-by-type breakdown and 6,096 rows for the bunker-sales breakdown. An optional API key raises the rate limit.
UK DfT port freight statistics
The UK Department for Transport publishes port freight statistics, quarterly and annual ODS tables and annual data-table zips covering UK major and minor port tonnage, cargo units and vessel arrivals, on GOV.UK under the maritime and shipping statistics collection.
Free tier: Keyless ODS, CSV and zip downloads from GOV.UK statistical data sets and statistics pages; no account needed.
Shanghai Shipping Exchange SCFI
The Shanghai Shipping Exchange publishes the Shanghai Containerized Freight Index (SCFI) headline values on a public web page, comparing the current index to the prior week by route.
Free tier: Public index page showing the current SCFI value and a week-over-week comparison; no free bulk API or download is documented.
Drewry World Container Index
Drewry publishes its World Container Index (WCI), a weekly composite and route-level container freight-rate assessment, on a public headline page.
Free tier: Public WCI headline page with the weekly composite and selected route assessments; no free bulk download is documented.
Freightos Baltic Index (FBX)
Freightos publishes the Freightos Baltic Index (FBX) container freight benchmarks on a public Terminal page covering major ocean trade lanes.
Free tier: Public FBX headline/lane views; exports and granular history via paid account per provider FAQ.
USACE Waterborne Commerce Statistics Center
The U.S. Army Corps of Engineers' Waterborne Commerce Statistics Center (WCSC) captures vessel, tonnage, commodity, origin and destination information from vessel operating companies, publishing it through Vessel Data, Ports and States Data, Navigation Infrastructure, Fact Cards, Commerce Data, Origin/Destination Data, Foreign Data, Container Traffic, downloadable Waterway Data, GIS products, U.S. Waterways Monthly Indicators and the U.S. Foreign Waterborne Transportation Statistics Program.
Free tier: Free public statistics and downloads; no account.
BTS Port Performance Freight Statistics
The Bureau of Transportation Statistics (BTS) Port Performance Freight Statistics Program provides nationally consistent capacity and throughput performance measures for U.S. seaports, published through dashboards (including a Container Port Activity Dashboard), Port Profiles, an Annual Report to Congress, a Goods Movement Within the U.S. Supply Chain commodity-profile series, Recent Supply Chain Events Analysis and additional port-related data source links.
Free tier: Free public dashboards, port profiles and annual reports; no account.
MarineCadastre AccessAIS
MarineCadastre AccessAIS is NOAA/BOEM's interactive clip-and-ship tool for ordering historical AIS broadcast point data for a user-defined area and time window in U.S. waters.
Free tier: Free interactive AccessAIS orders for custom AOI/time; FAQ caps a single order at 2 GB and one active order per user. Nationwide annual point files are also offered via the MarineCadastre AIS bulk download page. No account fee.
NOAA Electronic Navigational Charts (ENC)
NOAA Office of Coast Survey publishes official U.S. Electronic Navigational Charts (ENC) as S-57 databases of nautical chart features for download from the Chart Locator and regional ENC download pages.
Free tier: Free keyless ENC downloads from the Chart Locator and regional ENC download pages; weekly Notice to Mariners updates (timing not guaranteed).
Port of Rotterdam throughput figures
The Port of Rotterdam Authority publishes quarterly and year-to-date cargo throughput figures (dry bulk, liquid bulk, containers in tonnes and TEU, breakbulk) on its pressroom Throughput figures page, plus a Port Performance dashboard with container TEU and related operational indicators sourced from port dues / AIS..
Free tier: Free public quarterly/YTD throughput press pages and Port Performance dashboard view; no bulk API documented on the checked pages.
Hong Kong Marine Department port and maritime statistics
Hong Kong's Marine Department publishes Port and Maritime Statistics including monthly, quarterly and year-to-date vessel-arrival tables by ocean/river, cargo/passenger, ship type and flag, plus net registered tonnage and the Port of Hong Kong in Figures series..
Free tier: Free public HTML/PDF statistics tables on the Marine Department site; no bulk API documented on the checked page.
Research & Grey Literature
OpenAlex API
OpenAlex is a nonprofit, open index of scholarly works, authors, sources, institutions, topics and more, served as a REST API that returns JSON.
Free tier: No key: basic queries at up to 10 requests per second. Free key: $1 of API usage per day (resets at midnight UTC), 30 requests per second and cursor paging past the first page; a new account spends its first $1 at up to $0.10 every 5 minutes. per_page is at most 100 and basic paging stops at 10,000 results.
Crossref REST API
Crossref's public REST API exposes the scholarly metadata that Crossref members and trusted sources deposit: bibliographic records plus funding data, licence information, post-publication updates, ORCID and ROR IDs and, for some records, abstracts.
Free tier: No sign-up. Crossref's table lists the public pool at a rate limit of 5 with concurrency 1 and the polite pool (mailto) at 10 with concurrency 3; on 2026-11-03 the response headers showed 1 and 3 requests per 1s. The paid Metadata Plus pool lists 150 with no concurrency limit.
arXiv API
arXiv's public API returns search results and metadata for arXiv e-prints as an Atom XML feed: titles, abstracts, authors, categories, identifiers, dates and links to each abstract page and PDF.
Free tier: No key. Legacy APIs (arXiv API, OAI-PMH, RSS): no more than one request every three seconds, one connection at a time, across all machines you control. At most 2,000 results per call and 30,000 per query.
NCBI E-utilities (PubMed)
NCBI's Entrez Programming Utilities (E-utilities) are the public API to PubMed, NLM's database of citations and abstracts of biomedical literature, of which MEDLINE is the largest component.
Free tier: No key: no more than 3 requests per second per computer (IP address), across all E-utilities; an API key allows more. Series of more than 100 requests: run at weekends or between 9 pm and 5 am Eastern Time on weekdays.
DataCite REST API
DataCite's public REST API returns JSON metadata for DOIs registered with DataCite, which include research datasets, software and other research outputs: titles, creators, publisher, publication year, resource type, rights, related identifiers and landing-page URLs.
Free tier: No key. Unidentified requests: 500 per 5 minutes per IP address; identified (email in the User-Agent or a mailto parameter): 1,000; authenticated DataCite accounts: 3,000.
DOAJ (Directory of Open Access Journals) API
DOAJ's public API searches its directory of open access journals and the article records held for them: titles, journal, year, identifiers such as DOI and ISSN, abstracts and full-text links, plus journal details such as the licence.
Free tier: No key for search. Two requests per second on all API routes; bursts of up to five requests per user are queued as long as they average out to two per second.
Zenodo REST API
Zenodo, the open repository hosted by CERN, has a REST API for searching its published records of any resource type, such as publications, reports, datasets and software, and returning their metadata and file links in JSON, plus OAI-PMH harvesting.
Free tier: Guest users: 60 requests per minute and 2,000 per hour; authenticated users: 100 per minute and 5,000 per hour. Search REST endpoints and OAI-PMH harvesting: 30 requests per minute.
OSTI.GOV API (U.S. DOE research results)
The OSTI.GOV API from the U.S. Department of Energy's Office of Scientific and Technical Information queries DOE's repository of research information resulting from DOE research funding: technical reports, journal articles and accepted manuscripts, datasets, software, patents, conference papers and more.
Free tier: Terms restrict use of the documents beyond reading, downloading and analysing. No key; 20 records per page by default (rows and page parameters). A request rate limit is not stated.
OpenAIRE Graph API
The OpenAIRE Graph API queries the OpenAIRE Graph, which aggregates metadata from a wide range of scholarly resources into linked records for research products (such as publications), data sources, organizations, projects and persons.
Free tier: Unauthenticated: up to 60 requests per hour. Registered users: up to 7,200 requests per hour with a personal access token, used for up to one hour at a time. Offset paging stops at 10,000 results per query.
OpenCitations Index and Meta API
OpenCitations publishes open bibliographic citation data through REST APIs: OpenCitations Index returns, for a DOI or other identifier, the citations to a work and the references it makes, each citation with its own Open Citation Identifier (OCI), creation date and timespan, and OpenCitations Meta returns bibliographic metadata for works.
Free tier: No token required; a free access token is encouraged for code. 180 requests per minute per IP address; use the database dumps for large-scale retrieval.
World Bank Documents & Reports API
The World Bank Documents & Reports API searches and retrieves records for the public World Bank documents on its Documents & Reports site, returning JSON or XML.
Free tier: Terms restrict use (non-commercial API use for Materials without specific terms). No key; 10 rows per page by default (rows and os parameters). A numeric rate limit is not stated; the terms bar use that exceeds reasonable request volume.
Weather
National Weather Service API (api.weather.gov)
Official U.S. forecasts, alerts and observations through api.weather.gov.
Free tier: Free, no key. A User-Agent is required. The numeric rate limit is not public.
NASA POWER (Prediction Of Worldwide Energy Resources) API
NASA POWER solar and meteorological time series for points and regions, including temperature, precipitation, radiation, humidity and wind.
Free tier: Free public API; no key observed or stated on the pages read. Daily single-point requests allow at most 20 parameters; regional requests allow one parameter.
Open-Meteo Weather Forecast API
Hourly weather forecasts for coordinates, including temperature, precipitation, wind, humidity, pressure and weather codes, assembled from national weather models and returned as JSON, CSV or XLSX.
Free tier: No key; non-commercial use only. Less than 10,000 calls/day, 5,000/hour and 600/minute. Pricing also lists 300,000 calls/month.
ECMWF Open Data (real-time forecasts)
A free subset of ECMWF real-time IFS and AIFS forecasts, including deterministic and ensemble products, distributed primarily as GRIB2 files through the Open Data portal and cloud replicas..
Free tier: No key. Most recent 12 forecast runs, about 2–3 days, across four daily cycles. Products are GRIB2 unless stated otherwise.
News & RSS
Federal Reserve Board RSS feeds
Official Federal Reserve Board RSS feeds for press releases, monetary policy releases, speeches, testimony, statistical releases and other Board updates.
Free tier: Public RSS files; no account or key. Feed retention and item count are not stated.
European Central Bank RSS feeds
Official ECB RSS feeds for press releases, speeches, interviews, press conference transcripts, publications and exchange-rate updates.
Free tier: Public RSS files; no account or key. Feed retention and item count are not stated.
SEC EDGAR RSS feeds
Official SEC RSS and Atom feeds for recent EDGAR filings and SEC materials.
Free tier: No key. Declare the User-Agent with organization and contact information. Latest-filings results can be filtered by company, CIK or form type.
OSINT
USGS Earthquake Hazards real-time feeds and event API
Public USGS earthquake event data as GeoJSON, CSV, QuakeML and KML feeds plus the FDSN event API.
Free tier: Free, no key. FDSN event queries return at most 20,000 events.
NASA FIRMS active fire data
Public NASA FIRMS satellite detections of active fires and thermal anomalies from VIIRS and MODIS.
Free tier: Recent 24-hour, 48-hour and 7-day files are keyless in the checked path. API and map services use a free MAP_KEY. Some download folders require Earthdata Login.
GLEIF LEI Golden Copy and API
GLEIF publishes worldwide Legal Entity Identifier records and relationship data through Golden Copy XML, CSV and JSON files plus a JSON API.
Free tier: Free API and Golden Copy or delta-file access without a key. API search is rate-limited to 60 requests per minute per user.
UK Police Data API
Public JSON endpoints for street-level crime, outcomes, stop and search, forces, neighbourhoods and police locations across the participating UK forces.
Free tier: No key. Street-crime point queries cover one mile; polygons with more than 10,000 crimes return HTTP 503.
UCDP Conflict Data API
Uppsala Conflict Data Program exposes georeferenced organized-violence events and yearly conflict datasets through a versioned REST API returning paginated JSON.
Free tier: Free token requested by email with intended use; requests are reviewed in 3–5 working days. API quota is 5,000 requests per day and errors count.
GeoNames Gazetteer Dumps
Daily GeoNames gazetteer extracts as ZIP-compressed, tab-delimited text, with worldwide and country files plus alternate-name and change files.
Free tier: The worldwide, country, city, alternate-name and dated change files are free keyless downloads. A paid premium-data variant is separate.
OpenStreetMap Planet Files
Complete OpenStreetMap database snapshots as compressed XML and PBF, plus full-history files, changesets and minutely, hourly and daily replication diffs.
Free tier: Complete weekly snapshots, history files and replication diffs are keyless file downloads. The 2026-11-01 latest snapshot was 89 GB as PBF or 167 GB as compressed XML.
Smithsonian Global Volcanism Program
Smithsonian Volcanoes of the World records for Holocene and Pleistocene volcanoes and Holocene eruptions, exposed by an OGC Web Feature Service in CSV, GML, GeoJSON, KML and Shapefile formats.
Free tier: Keyless WFS access for non-commercial use. The checked sample requests 100 features; the provider does not state a free-tier query cap.
OONI Measurement Data and API
OONI publishes volunteer network-interference measurements through a JSON API and as compressed JSONL files in a public S3 bucket.
Free tier: Keyless read API and unsigned public S3 access. Measurement API time ranges are capped at 180 days; use S3 rather than the API for bulk data.
Harvard Caselaw Access Project
Static bulk files of official, book-published United States state, federal and territorial court decisions, with JSON case text and metadata, HTML, per-volume ZIP files and scanned-volume PDFs.
Free tier: All static data files are public with no account, key or meter stated. Bulk downloads are organized by reporter and volume.
Ookla Speedtest Open Data
Ookla publishes quarterly fixed and mobile network-performance aggregates in zoom-16 geographic tiles as Apache Parquet and zipped Shapefiles.
Free tier: Keyless public S3 files for non-commercial use; one Parquet file and one zipped Shapefile per service type and quarter.
USGS Landsat M2M API
USGS EarthExplorer and its RESTful JSON M2M API expose Landsat scene search, metadata and download URLs for raster products including GeoTIFF bands and bundles.
Free tier: Landsat archive search and downloads are free. M2M access requires a free EROS account, a separate approved access request and an application token.
GeoNet New Zealand Hazard API
GeoNet exposes New Zealand earthquake, shaking and volcanic-status data through keyless JSON, GeoJSON and CAP endpoints, alongside catalogue services in CSV, GML, KML and QuakeML.
Free tier: Keyless public API access. The quick quake endpoint returns at most 100 possibly felt quakes from the last 365 days; the volcano-quake endpoint covers 60 days.
EU JRC INFORM Risk Index
The EU JRC-led INFORM Risk Index publishes country-level humanitarian-crisis and disaster-risk scores through keyless JSON endpoints and downloadable XLSX workbooks.
Free tier: Keyless JSON endpoint and direct XLSX downloads. No query cap or paid tier is stated on the checked pages.
WorldPop Open Population Data
WorldPop publishes open gridded population estimates and related spatial-demographic products through a keyless REST catalogue and downloadable GeoTIFF files.
Free tier: Keyless REST metadata and direct data-file downloads. File size varies; the checked worldwide 2020 1 km GeoTIFF was listed as 829.43 MB.
Mass Mobilization Protest Data
The Mass Mobilization project provides event-level protests against governments as an unrestricted tab-delimited file through Harvard Dataverse, with source CSV and Stata representations plus a PDF codebook.
Free tier: Keyless download of the unrestricted tabular data and codebook. The checked tab file was 15,625,472 bytes and contained 17,145 rows.
NHTSA vPIC Vehicle API
NHTSA's vPIC API decodes VINs and returns vehicle, make, model, manufacturer, WMI, equipment and variable data as JSON, CSV or XML.
Free tier: No daily action limit is stated. Batch VIN decoding accepts up to 50 VINs, and NHTSA asks large batch users to run at night Eastern time or on weekends.
Meta Social Connectedness Index
Meta's Social Connectedness Index measures the relative probability of Facebook friendship between pairs of countries or subnational areas from an anonymized platform snapshot.
Free tier: All listed files are keyless. The country CSV is about 0.56 MB; checked subnational resources range up to about 465 MB, and several level-2 resources are split into shards.
MIT Lincoln Laboratory LADI
The Low Altitude Disaster Imagery dataset provides geotagged, oblique airborne disaster images from Civil Air Patrol missions with CSV labels for infrastructure, flooding, debris, vegetation and damage classes.
Free tier: Public S3 listing and downloads need no AWS account. Full archives are large: the checked listing reports about 3.49 GB for resized v2 and 144 GB for full-resolution v2.
Grillo OpenEEW Archive
OpenEEW publishes raw IoT accelerometer records for earthquake early-warning research as public JSON Lines objects partitioned by country, device and time, plus sensor-location metadata.
Free tier: Public S3 listing and downloads need no AWS account. Objects are partitioned into approximately five-minute JSON Lines files; no download quota is stated.
ADSB IQ Daily Aircraft Data
ADSB IQ publishes one zstd-compressed Parquet file per UTC day containing append-only aircraft state diffs from its volunteer feeder network.
Free tier: Daily Parquet releases are public with no account, token or stated download limit. Recent daily files checked are roughly 0.5-0.6 GB each.
Correlates of War Project datasets
The Correlates of War Project publishes downloadable CSV, Stata and ZIP datasets on state-system membership, wars, militarized disputes, capabilities, alliances, contiguity, territorial change, organizations, religion and trade.
Free tier: Keyless file downloads. Users cannot charge for access and cannot distribute a dataset to a third party without written permission from the COW director and data host.
End of Term Web Archive datasets
End of Term Web Archive data preserves crawls of United States government websites around presidential transitions as WARC content, WAT metadata, WET text, META, CDX and URL-index files.
Free tier: Keyless HTTPS and S3 access to the available datasets; no download quota is stated. The 2024 WARC set is 2.29 PB compressed, so selective retrieval is practical.
Common Crawl web corpus and indexes
Common Crawl publishes petabytes of crawled web pages as WARC raw responses, WAT metadata and WET text, with CDX URL indexes and columnar indexes for discovery.
Free tier: Free keyless HTTPS download and index access. The corpus is petabyte-scale, and broad CDX filtering should move to the downloadable or columnar index rather than the shared URL-index server.
DB-IP Lite databases
Free DB-IP Lite country, city and ASN IP-range databases in CSV and MMDB formats, with country fields and, by edition, city, coordinates, autonomous-system number and organization.
Free tier: Keyless monthly Country Lite, City Lite and ASN Lite downloads in CSV and MMDB; Lite editions have reduced coverage and accuracy.
Indian Supreme and High Court Judgments
Public bulk archives of judgments from the Supreme Court of India and 25 Indian High Courts, with PDFs plus raw JSON and structured Parquet metadata.
Free tier: Public S3 downloads require no AWS credentials. The provider asks bulk users to prefer tar archives and Parquet rather than millions of individual PDF or JSON objects.
FlyItalyADSB API
A REST API for live and historical community ADS-B, Mode-S and MLAT aircraft data as readsb-compatible JSON, including ICAO address, callsign, registration, type, position, altitude, speed, track, squawk, freshness and source fields.
Free tier: 30 requests/minute per key, 300,000/month, 500 km maximum live radius and 100 requests/minute per IP. Free overflight searches cover at most 10 km and 6 hours, with at most 10 searches/minute per key.
IP2Location LITE databases
Free IP2Location LITE IPv4 and IPv6 range databases in CSV, BIN and CIDR formats, with country, region, city, coordinates, ZIP code and time zone depending on the package.
Free tier: One free signup unlocks the LITE IP2Location, IP2Proxy and ASN databases. The provider warns that account sharing or massive downloads can disable a LITE account.
MaxMind GeoLite databases
Free MaxMind IP geolocation and ASN databases in CSV and MMDB formats, with country, city, postal, coordinates, accuracy-radius, autonomous-system and organization fields depending on the edition.
Free tier: Free account and licence key; 30 database downloads per day. GeoLite web-service limits are separate and are not part of this files entry.
OpenSanctions bulk data and API
OpenSanctions aggregates sanctions, regulatory, PEP and related public-interest entity data in FollowTheMoney JSON, nested JSON, CSV, text and Senzing exports, with names, identifiers, entity types, countries, topics and source links.
Free tier: Non-commercial use only. Keyless bulk downloads are free for non-commercial users. The hosted API requires a key; business-email signups receive a free trial, and public-interest API keys are available for journalism, civil-society advocacy and academic research.
ACLED conflict event data
ACLED publishes disaggregated records of political violence, demonstrations and selected strategic developments as JSON or CSV, with event dates, actors, event types, locations, coordinates, fatalities, source names and precision fields.
Free tier: Non-commercial use only. A free myACLED account provides API and export access for permitted non-commercial use. API calls return at most 5,000 events by default; use pagination for larger results.
ReliefWeb API
The ReliefWeb API provides curated aid reports, disasters, jobs, training and reference data as JSON over HTTPS, with titles, dates, countries, sources, themes, formats, disaster links and attachment metadata.
Free tier: Non-commercial use only. Read and search access requires an approved appname. Responses are capped at 1,000 entries per call and usage at 10,000 calls per day.
OFAC Sanctions List Service
The U.S. Treasury's Office of Foreign Assets Control (OFAC) publishes its Specially Designated Nationals (SDN) list and its consolidated non-SDN sanctions lists as downloadable XML, CSV, fixed-width and delimited files, plus delta files of changes.
Free tier: Keyless downloads of the full SDN and consolidated non-SDN files (XML, CSV and other formats), custom datasets by list or program, and delta files. The full SDN XML was about 29 MB on 2026-11-02.
Library of Congress Congress.gov API
The Congress.gov API returns U.S. legislative data for bills, laws, amendments, members, committees, votes, nominations, treaties, hearings and Congressional Record collections as JSON or XML.
Free tier: A free api.data.gov key is required. List responses default to 20 records and are capped at 250 records per request.
ITA Consolidated Screening List
The International Trade Administration consolidates active export-screening lists from the U.S. Departments of Commerce, State and the Treasury into downloadable CSV, TSV and JSON files plus a JSON search API.
Free tier: Keyless complete CSV, TSV and JSON downloads are available. API access requires a free portal account, API product subscription and subscription key; the API contains active entities only.
UK Contracts Finder OCDS API
The UK Cabinet Office exposes Contracts Finder procurement notices through keyless Open Contracting Data Standard JSON endpoints and daily or date-specific CSV downloads.
Free tier: Published OCDS endpoints and CSV downloads need no account or key. Search responses return 1 to 100 releases and provide a cursor for the next page.
EU Consolidated Financial Sanctions Files
The European Commission publishes consolidated EU financial-sanctions records as keyless CSV, XML and PDF files, with an XSD for XML consumers.
Free tier: Complete CSV, XML and PDF snapshots download without an account or key. No query interface or free-tier row cap applies to the files.
FCDO UK Sanctions List
The UK Foreign, Commonwealth & Development Office publishes people, entities and ships designated or specified under UK sanctions regulations in keyless CSV, XML, ODS, ODT, HTML, text and PDF files.
Free tier: Complete CSV, XML, ODS, ODT, HTML, text and PDF files are available without an account or key. No row or download cap is stated.
Copernicus Data Space Sentinel APIs
Copernicus Data Space exposes Sentinel Earth-observation catalogue metadata through STAC and OData APIs and provides authenticated product downloads and processing services.
Free tier: Keyless STAC catalogue search. A free registered account receives the documented general-user quotas, including 12 TB per rolling 30 days for immediately available S3/OData/STAC downloads, four concurrent connections and 20 MB/s per connection.
NOAA SWPC JSON Services
NOAA Space Weather Prediction Center publishes keyless static JSON files for real-time solar-wind plasma, magnetic-field and ephemeris observations, alongside indices, forecasts, alerts and model outputs.
Free tier: Keyless static JSON downloads. The checked real-time solar-wind JSON files cover the latest 24 hours; no file-size or request quota is stated.
Free Law Project CourtListener API
Free Law Project exposes U.S. case law, federal dockets and filings, judges, court metadata, oral arguments, citations and financial disclosures through a JSON REST API.
Free tier: Non-members receive 5 authenticated requests per minute, 50 per hour and 125 per day. The checked court-directory endpoint also returned JSON without authentication; access varies by endpoint.
Office of the Federal Register API
The Office of the Federal Register exposes rules, proposed rules, notices and presidential documents through JSON and CSV endpoints.
Free tier: Keyless public API access. Document searches return no more than 1,000 records per page and cover publications since 1994.
U.S. GPO GovInfo API
The U.S. Government Publishing Office provides JSON discovery and retrieval services for official federal publications and their metadata.
Free tier: A free API.data.gov key provides access to discovery and package endpoints. Page size is capped at 1,000 records.
UK Companies House Public Data API
Companies House provides JSON search and retrieval endpoints for public UK company-register data.
Free tier: Companies House says its public company data is free through the API. The standard quota is 600 requests in a five-minute period; higher limits require contacting the provider.
Government of Canada CKAN API
Government of Canada catalogue metadata exposed through the Open Government CKAN Action API.
Free tier: The public catalogue Action API needs no key and supports GET requests only. Query and download caps are not stated; terms and formats can differ for linked resources.
EU TED Search API
The Publications Office of the European Union exposes published Tenders Electronic Daily procurement notices through a search API.
Free tier: Anonymous Search API access. Page-number mode: 15,000 retrievable notices per query, 250 notices per page and 10,000 fields per page; iteration mode has no total-notice cap but keeps the per-page limits.
UNHCR Refugee Statistics API
UNHCR's REST API exposes aggregate statistics on refugees, asylum-seekers, internally displaced people, stateless people, returns, asylum applications and decisions.
Free tier: Public, keyless API with pagination; endpoint documentation states a default limit of 100 items. UNHCR may impose quotas or technical controls, but no numeric request quota is published.
Wikimedia Wikidata Query Service
Wikimedia's Wikidata Query Service provides SPARQL access to Wikidata's structured entities, properties and relationships.
Free tier: Public endpoint with no key. Queries time out after 60 seconds; one client identified by user agent and IP receives 60 seconds of processing time per 60 seconds and up to 30 erroneous queries per minute.
Cloudflare Radar API
Cloudflare Radar exposes aggregated Internet traffic, attack, DNS, routing, outage and technology-trend data through a request/response API.
Free tier: Non-commercial use only. The Radar API is free and available on all plans, but it requires a Cloudflare API token.
RIPEstat Data API
RIPE NCC's public RIPEstat Data API returns JSON about Internet number resources, routing, registration, geolocation, DNS, abuse contacts and related network measurements.
Free tier: Non-commercial use only. Keyless access has no request-count limit. Users planning regular use above 1,000 requests per day are asked to register a sourceapp identifier with RIPE NCC.
UN Security Council Consolidated List
The United Nations Security Council Consolidated List names all individuals and entities subject to measures imposed by the Security Council.
Free tier: Non-commercial use only. Keyless XML, HTML and PDF downloads are available; the UN website terms permit downloaded materials only for personal, non-commercial use and prohibit resale, redistribution, compilation and derivative works.
OpenFEC API
The FEC REST API exposes U.S. federal campaign-finance filings and derived records as JSON, including candidates, committees, receipts, disbursements and the names of individual contributors.
Free tier: Non-commercial use only. A free API key enables up to 1,000 calls per hour, with up to 100 results per page; users may request a 7,200-calls-per-hour limit from the FEC.
EMSC SeismicPortal Web Services
EMSC SeismicPortal provides an FDSN event API for earthquake parameters, with requested results in GeoJSON, QuakeML or CSV.
Free tier: Free keyless FDSN event queries with time, location, depth, magnitude, catalogue, limit and offset parameters. A maximum query size is not stated; mirroring or bulk-copying the database requires prior written permission.
INTERPOL Red Notices (public extracts)
INTERPOL's official View Red Notices page lists public extracts of Red Notices, defined as "a request to law enforcement worldwide to locate and provisionally arrest a person pending extradition, surrender, or similar legal action." INTERPOL says a Red Notice "is not an international arrest warrant" and that "The majority of Red Notices are restricted to law enforcement use only"; extracts are published at the requesting member country's request.
Free tier: Free to view; INTERPOL publishes no API or bulk download for agents. Automated extraction requires prior written permission.
CelesTrak GP Orbital Elements
CelesTrak publishes General Perturbations orbital element data for Earth-orbiting objects through documented queries in TLE, 2LE, XML, KVN, JSON and CSV formats.
Free tier: Keyless GP queries by catalogue number, international designator, name, group, special set or update window in TLE, 2LE, XML, KVN, JSON and CSV. Download only the data needed and cache it within an organization.
adsb.lol Open Flight Data
adsb.lol is a community ADS-B network that publishes unfiltered aircraft positions through a free JSON API and daily gzip-compressed JSON archives.
Free tier: The public API and daily historical releases are available without an account. The API docs say keys can be requested and may be required in the future; production users are asked to make contact.
Canada Consolidated Autonomous Sanctions List
Global Affairs Canada publishes the Consolidated Canadian Autonomous Sanctions List in XML, HTML and PDF.
Free tier: Complete XML, HTML and PDF versions are available without an account or key. The list is for administrative purposes only and the provider warns it may not be up to date.
IMF PortWatch
IMF PortWatch, built with the University of Oxford, estimates daily port activity and chokepoint transit from AIS vessel-tracking signals on about 90,000 ships.
Free tier: Keyless ArcGIS REST queries and direct downloads of the Daily Port Activity and Daily Chokepoints Data feature layers, updated weekly on Tuesdays at 9am ET. No download quota is stated.
Global Fishing Watch APIs
Global Fishing Watch publishes APIs for apparent fishing activity and vessel presence, radar-detected "dark" vessels that are not broadcasting AIS, vessel identity lookups across AIS and dozens of public registries, vessel encounters and transshipment events, and bulk CSV/JSON export, built from AIS combined with government VMS and satellite radar data.
Free tier: Non-commercial use only. A free API token covers vessel presence and fishing-activity tiles/reports, dark-vessel detections, vessel identity lookups, encounters/transshipment events, and bulk CSV/JSON export.
Danish AIS historical data
The Danish Maritime Authority's shore-based AIS network publishes continuously updated historical AIS data for Danish waters as zipped daily CSV files, free to download with no account or key.
Free tier: Free zipped daily CSV downloads with no account or key, covering Danish waters. No download quota is stated.
EMODnet Human Activities
EMODnet Human Activities publishes harmonized layers on maritime and marine human activities in EU waters, including vessel-density and shipping-route-density rasters, main-ports traffic points, telecom cables, offshore oil and gas installations, pipelines, military areas, fisheries, aquaculture and waste-disposal sites.
Free tier: Free map viewer and products-catalogue downloads of vessel/route density rasters, main-ports traffic, cables, offshore installations and other human-activity layers for EU waters. No account or key is needed; quotas are not stated.
NOAA NDBC buoy data
NOAA's National Data Buoy Center publishes realtime observations from its moored and drifting buoys and C-MAN coastal stations as flat files over HTTPS, one file per station and data type (for example standard meteorological data at https://www.ndbc.noaa.gov/data/realtime2/41002.txt), covering wind, waves, sea surface temperature, pressure, air temperature and more.
Free tier: Keyless flat-file downloads over HTTPS for the current 45 days of data per station and data type. No numeric request cap is stated.
UKMTO recent incidents
UK Maritime Trade Operations (UKMTO), run by the Royal Navy as part of the UK's Maritime Situational Awareness Capabilities, publishes a public Recent Incidents page listing maritime security advisories for the Red Sea, Gulf and wider Indian Ocean region, such as piracy, attacks and suspicious-approach reports.
Free tier: Public, free-to-view incident advisory page with in-browser filters. No API or bulk download is published.
BarentsWatch AIS API
BarentsWatch, run by the Norwegian Coastal Administration, publishes open AIS vessel-position data for Norwegian waters through documented REST APIs, including a live OpenAPI host at live.ais.barentswatch.no.
Free tier: Open Access AIS APIs are free with a self-registered client; no numeric request quota is stated, but OpenID Connect authentication is mandatory.
Copernicus Marine Service (CMEMS)
The EU's Copernicus Marine Service (CMEMS) publishes global ocean and European regional-seas products, physics, biogeochemistry, waves, sea ice and more, through the Copernicus Marine Toolbox and APIs at data.marine.copernicus.eu.
Free tier: Free registration is required before downloading or subsetting any product through the Copernicus Marine Toolbox or APIs; products are free of charge under the current licence/SLA.
Combined IUU Fishing Vessel List
Trygg Mat Tracking's Combined IUU Vessel List consolidates regional fisheries management organizations' illegal, unreported and unregulated (IUU) fishing vessel lists into one searchable site, with identity fields such as name, flag, call sign and IMO number.
Free tier: Non-commercial use only. Free public website search; an Excel download is available from the Download page, which asks the requester's reason, and email change notifications are optional.
Panama Canal Authority maritime services
The Panama Canal Authority (ACP) publishes a maritime services hub covering transit-related public information and advisories for vessels using the canal.
Free tier: Public maritime-services pages; no free bulk API is documented.
Suez Canal Authority navigation statistics
The Suez Canal Authority (SCA) publishes official navigation statistics for canal traffic on a public statistics page.
Free tier: Public navigation-statistics page; no free bulk API is documented.
ITU MARS ship station list
The ITU's Maritime mobile Access and Retrieval System (MARS) is a public search tool for ship-station records, name, MMSI, call sign, ship ID and administration, drawn from ITU's maritime radio registrations.
Free tier: Public interactive lookup; no bulk API is documented.
Ukraine War & Sanctions shadow fleet
Ukraine's War & Sanctions portal publishes a government Shadow Fleet section with vessel cards that include IMO numbers, flags, vessel types and sanction-status filters for marine vessels said to be involved in transporting sanctioned oil.
Free tier: Public web listing of shadow-fleet vessel cards with IMO and filters. No bulk API documented.
GPSJAM GNSS interference maps
GPSJAM publishes daily hexagonal maps of likely GPS/GNSS interference derived from aircraft ADS-B navigation-accuracy reports aggregated from airplanes.live and ADS-B Exchange.
Free tier: Free public daily maps; no account. No bulk API documented on About/FAQ.
WCPFC Record of Fishing Vessels
The Western and Central Pacific Fisheries Commission (WCPFC) publishes its Record of Fishing Vessels (RFV), a combined list of vessels that Members and Cooperating Non-Members have authorized to fish beyond national jurisdiction in the Convention Area.
Free tier: Public RFV browse and search. No free bulk API documented on the checked page.
NSIDC Sea Ice Index (G02135)
The National Snow and Ice Data Center (NSIDC) Sea Ice Index (G02135) provides consistent Arctic and Antarctic sea-ice extent and concentration images and data values (including GeoTIFF and ASCII products) from November 1978 to the present.
Free tier: Free HTTPS file access under noaadata.apps.nsidc.org/NOAA/G02135/; citation required. No numeric rate limit stated on the data root listing.
EIA World Oil Transit Chokepoints
The U.S. Energy Information Administration (EIA) publishes its World Oil Transit Chokepoints analysis with estimated petroleum volumes moving through major maritime chokepoints such as the Strait of Hormuz, Strait of Malacca, Suez/SUMED, Bab el-Mandeb, Danish Straits, Turkish Straits, Panama Canal and the Cape of Good Hope.
Free tier: Free public analysis pages and tables. Not a live bulk API for this product.
NOAA ERDDAP CoastWatch
NOAA's Environmental Research Division (ERD) CoastWatch ERDDAP server exposes oceanographic datasets (sea-surface temperature, winds, chlorophyll and related fields) through a uniform web service that can return HTML tables, CSV, NetCDF, JSON and other formats without an account.
Free tier: No account or key for the public ERDDAP endpoints checked. Request modestly on shared infrastructure.
NOAA Ocean Prediction Center
NOAA's Ocean Prediction Center (OPC) publishes marine weather analyses and forecasts for Atlantic, Pacific and Alaska/Arctic waters, including graphical products, briefing pages and links to digital forecast data used by mariners.
Free tier: Free public forecast and analysis products; no account.
ICCAT Record of Vessels
The International Commission for the Conservation of Atlantic Tunas (ICCAT) publishes its Record of Vessels, covering authorized vessel lists established under ICCAT recommendations (including vessels 20 m or greater, tropical tuna, carrier, Mediterranean swordfish and albacore records).
Free tier: Public search and list downloads linked from the Record of Vessels page. No API documented.
FAO Global Record of Fishing Vessels
The FAO Global Record of Fishing Vessels, Refrigerated Transport Vessels and Supply Vessels is a single access point for information on vessels used for fishing and fishing-related activities, aimed at fighting IUU fishing.
Free tier: Public information-system hub / application launch. No free bulk redistribution API documented on the checked pages.
World Bank Global Shipping Traffic Density
The World Bank's Global Shipping Traffic Density dataset, produced in partnership with IMF's World Seaborne Trade Monitoring System (Cerdeiro, Komaromi, Liu and Saeed, 2020), publishes six raster layers — Commercial, Fishing, Oil & Gas (platforms, rigs and FPSOs), Passenger, Leisure and a combined Global layer — built from IMF's analysis of hourly AIS positions.
Free tier: Free public download of six global raster layers (Commercial, Fishing, Oil & Gas, Passenger, Leisure, Global); no account.
MARAD MSCI U.S. Maritime Advisories
The U.S. Maritime Administration (MARAD) MSCI Portal publishes U.S. Maritime Advisories and Alerts, with a table of Active Advisories (Title, Status, Effective Date, Expire Date) covering sea areas under elevated threat, such as the Red Sea/Bab el-Mandeb/Gulf of Aden/Arabian Sea/Somali Basin Houthi-attack advisory, the Persian Gulf/Strait of Hormuz/Gulf of Oman Iranian-attack advisory, the Black Sea and Sea of Azov combat-operations advisory, and Gulf of Guinea and Gulf of Aden piracy advisories.
Free tier: Free public advisories and alerts; free email subscription offered.
USCG NAVCEN Maritime Safety Information
The U.S. Coast Guard Navigation Center (NAVCEN) publishes Marine Safety Information Bulletins (national-level MSIBs from Headquarters and district/sector MSIBs for local safety zones, waterway restrictions, marine events, hazards and enforcement guidance), Broadcast Notices to Mariners, weekly Local Notices to Mariners (PDF only), Light Lists, Maritime Security (MARSEC) levels, Port Status and USCG Port Contacts, GPS service interruption and testing notices, International Ice Patrol information and AIS historical data requests.
Free tier: Free public notices, bulletins and RSS feeds; free email alerts.
ReCAAP ISC piracy and sea robbery reports
The ReCAAP Information Sharing Centre (ISC) publishes piracy and sea-robbery reporting for Asia, including the Straits of Malacca and Singapore and the South China Sea: a Weekly Report, a Quarterly Report, an Annual Report, yearly List of Incidents PDFs (the home page links yearly incident-list PDFs for 2024, 2025 and 2026), Warnings & Alerts, and an interactive Incident Map searchable by date, location and ship name.
Free tier: Free public reports, alerts and incident map; no account.
Marine Regions maritime boundaries (EEZ)
Marine Regions (VLIZ, Flanders Marine Institute) publishes global maritime boundary datasets for download and through OGC services and a SOAP/REST API, including World EEZ v12 (2023-10-25), World 24 NM Contiguous Zone v4, World 12 NM Territorial Seas v4, Internal Waters v4, Archipelagic Waters v4, World High Seas v2 (2024-10-10) and Extended Continental Shelves v2, in GeoPackage, Shapefile and KML formats..
Free tier: Free downloads and web services; file downloads require a registration form.
IOC Sea Level Station Monitoring Facility
The IOC Sea Level Station Monitoring Facility (VLIZ + UNESCO/IOC) aggregates real-time tide-gauge data for the GLOSS core network and regional tsunami warning networks (IOTWS, NEAMTWS, PTWS, CARIBE-EWS).
Free tier: Non-commercial use only. Web view free; REST API needs free registration.
EU Fishing Fleet Register
The EU Fishing Fleet Register (managed by the Directorate-General for Maritime Affairs and Fisheries) lets users search all EU member-state fishing and aquaculture vessels by Flag State, Vessel Type, Vessel Name, CFR, UVI, IRCS, Registration Number, External Marking, MMSI, GT Tonnage, Length Overall, Main Power, and Latest Event/Event Date, with filters for period/history, flag state, vessel type, vessel identifiers, event type, LOA, GT and power (including a full-history option).
Free tier: Free search and captcha-gated export; no account.
Canadian Ice Service ice charts and conditions
Environment and Climate Change Canada's Canadian Ice Service (CIS) publishes daily ice forecasts, charts and graphs for Canada's navigable waters — Arctic Ocean, Western Arctic, Eastern Arctic, Hudson Bay, East Coast and Great Lakes — plus ice science, ice climatology, a CIS archive of historical ice charts and 30-year climate-normal ice charts..
Free tier: Free public ice charts and bulletins; non-commercial reproduction allowed with credit.
HELCOM AIS shipping density maps
HELCOM publishes annual Baltic Sea shipping-density maps derived from the HELCOM AIS network (AIS signals received by Baltic Sea states since 2005).
Free tier: Free public map service and metadata zip download for annual density products; no account stated on the checked pages.
DMA EU sanction designated vessels
The Danish Maritime Authority hosts the EU list of vessels designated under Annex XLII of Council Regulation (EU) 833/2014 (restrictive measures in view of Russia's actions destabilising Ukraine), with on-page vessel rows (name, IMO, date of application) and downloadable XLSX/CSV import versions for compliance screening..
Free tier: Free public HTML list plus XLSX/CSV import versions linked from the page; no account.
KSE Institute Russian Shadow Fleet Tracker
The Kyiv School of Economics (KSE) Institute publishes free public Russian Oil Tracker and Russian Shadow Fleet Tracker materials under its Russia Will Pay programme — monthly PDF reports and news notes on seaborne oil exports and shadow-fleet tanker activity, including Baltic-route shipment commentary..
Free tier: Free public programme page, news posts and tracker PDFs; no bulk API documented.
OpenSeaMap
OpenSeaMap is a free nautical charting project built on OpenStreetMap that publishes sea marks, lights, harbours and related marine layers on an interactive map, with data held in the OpenStreetMap database under ODbL..
Free tier: Free interactive map; data editable/exportable via the OpenStreetMap ecosystem under ODbL. No separate OpenSeaMap bulk API was documented on the checked pages.
ICC IMB Piracy Reporting Centre
The International Maritime Bureau (IMB) Piracy Reporting Centre at ICC Commercial Crime Services publishes a public Live Piracy Map plus advice to masters, piracy and armed-robbery prone-area warnings, and incident-reporting contacts for worldwide merchant shipping..
Free tier: Free public Piracy Reporting Centre pages including Live Piracy Map links and prone-area warnings; no bulk API documented.
Canadian Coast Guard Notices to Mariners (NOTMAR)
The Canadian Coast Guard Notices to Mariners (NOTMAR) site publishes Monthly and Annual Editions of Notices to Mariners and related Canadian navigational safety publications (including Notices to Shipping and List of Lights coverage under the same Open Information Licence programme) for free download..
Free tier: Free download of covered NOTMAR publications from notmar.gc.ca / Canadian Coast Guard sites; no account stated on the checked pages.
OpenFIGI
Bloomberg-backed OpenFIGI Open Symbology mapping API that maps tickers, ISINs and other identifiers to FIGI plus metadata (name, exchange, market sector, share-class and composite FIGI).
Free tier: No key: Mapping 25 requests/minute and 10 jobs/request. Free OpenFIGI API key: Mapping 250 requests/minute and 100 jobs/request. Search/Filter lower (5 requests/minute without key, 20 with key). No daily/weekly/monthly Mapping cap stated on the overview.
Cyber Threat
CISA Known Exploited Vulnerabilities
CISA's catalog of vulnerabilities with evidence of exploitation in the wild, downloadable as JSON or CSV with CVE ID, vendor, product, date added, required action, due date, ransomware-use status and CWEs.
Free tier: Complete JSON and CSV catalog downloads are public and keyless. No query API is provided on the checked page.
NIST National Vulnerability Database API
NIST's NVD CVE API 2.0 returns JSON vulnerability records with CVE IDs, descriptions, publication and modification times, status, CVSS metrics, weaknesses, configurations and references.
Free tier: Keyless access allows 5 requests per rolling 30-second window; a free API key allows 50. CVE responses return at most 2,000 records per page.
FIRST EPSS Scores API
FIRST's EPSS API returns daily JSON scores estimating the probability of observed exploitation activity for a CVE in the next 30 days, with percentile, score date and optional 30-day history.
Free tier: No registration. The public API permits 1,000 requests per minute and up to 10,000 records per response page; the CVE filter is limited to 2,000 characters. FIRST directs bulk users to the daily CSV.
OSV Vulnerability Database
OSV provides a keyless JSON API and downloadable JSON archives for open-source vulnerability records, including IDs, aliases, summaries, publication and modification times, affected packages, version ranges, references and severity data.
Free tier: Keyless API access and full or per-ecosystem dumps. HTTP/1.1 responses are capped at 32 MiB; v1/query paginates above 1,000 vulnerabilities or after 20 seconds.
abuse.ch threat feeds
Defensive threat-intelligence feeds from abuse.ch: URLhaus, ThreatFox, Feodo Tracker and SSLBL.
Free tier: URLhaus and ThreatFox require authentication and permit not-for-profit access within query and export volumes the provider considers reasonable; numeric community limits are not stated. Feodo Tracker and SSLBL are stated to be free without limitations under CC0 principles.
Spamhaus DROP and Intelligence API
Defensive network-reputation data combining keyless DROP JSON lists of malicious IPv4, IPv6 and ASN ranges with an authenticated JSON Intelligence API for IP and domain context.
Free tier: DROP is keyless and free for any use under its stated credit and update conditions. The Intelligence API Developer License gives one account six months of free access for up to 5,000 queries per month and excludes production or commercial use.
LevelBlue Open Threat Exchange OTX
Community defensive threat intelligence organized into pulses and indicators, available through JSON REST endpoints and a STIX/TAXII service.
Free tier: A registered account provides API-key access for non-commercial use. A 2017 LevelBlue API article states 10,000 requests per hour with a key; current plan documentation does not state a data-volume cap.
AbuseIPDB API
Crowdsourced defensive IP-abuse reports and reputation data through a JSON API, including single-IP checks, CIDR-block checks, report search and an IP blacklist.
Free tier: Individual plan: 1,000 IP checks and reports per day, 100 block checks per day and a basic blacklist up to 10,000 IPs. The API rate table states five blacklist requests per day for the standard tier.
MISP Galaxy Clusters
MISP Galaxy is a versioned collection of JSON knowledge-base clusters for threat actors, tools, ransomware, attack techniques and other analytical vocabularies.
Free tier: All repository cluster JSON files are public and keyless. No query service or fixed update schedule is provided.
CIRCL hashlookup and BGP Ranking
CIRCL operates keyless JSON APIs for matching MD5, SHA-1 and SHA-256 values against known-file databases and for querying autonomous-system security rankings over time. hashlookup responses can include file names, sizes, products, sources and trust context, while BGP Ranking returns AS descriptions, ranks, positions and history..
Free tier: Public, keyless REST APIs. No availability commitment, quota or BGP query cap is stated.
CERT Polska Warning List
CERT Polska's dangerous-website warning data in TXT, TSV, JSON, XML, ad-blocker, hosts, MikroTik and RPZ formats.
Free tier: Keyless downloads in eight documented formats; version 2 formats are limited to the latest six months.
CINS Army IP List
Keyless CINS Army threat intelligence as a plain-text list of IP addresses selected from the provider's active threat data.
Free tier: Keyless plain-text download capped at 15,000 IP addresses.
IPsum Threat IP Feed
Public IPsum threat intelligence as a tab-separated text feed aggregating suspicious or malicious IP addresses from more than 30 public lists.
Free tier: Keyless full feed and preprocessed threshold files from level 1 through level 8.
Cisco Talos PhishTank
PhishTank publishes verified, online phishing records as XML, CSV, JSON and serialized PHP downloads and offers a URL-status POST API.
Free tier: A few database downloads per day without a key; free application keys support automated downloads and higher API limits. Files update hourly, and unlimited HTTP HEAD checks are allowed when an application key is supplied.
OpenPhish Community Feed
OpenPhish's Community Feed is a plain-text list of currently active phishing URLs, one URL per line.
Free tier: Community Feed only: plain text, limited data, updated every 12 hours, no archive. Use is restricted to personal, academic or independent research that does not support business operations.
Proofpoint Emerging Threats Open
Proofpoint Emerging Threats Open is a downloadable set of Suricata and Snort IDS rules covering malware, phishing, exploits, command-and-control, scans and other network threats.
Free tier: ET Open rule files are keyless. Updates are normally once each weekday with occasional out-of-band releases; use version.txt before downloading and do not fetch the ruleset more than hourly.
GreyNoise Community API
GreyNoise's Community API returns a JSON reputation summary for one routable IPv4 address, including whether it was observed scanning, RIOT status, classification, owner name and last-seen date when available.
Free tier: 10 unauthenticated IPv4 lookups per day. A free account registered with a business email provides up to 50 searches per week, combined between the Community API and Visualizer; consumer-email accounts do not receive API-key access.
Google Safe Browsing API
Google Safe Browsing v5 provides REST methods for checking URLs or four-byte SHA-256 hash prefixes against Google's unsafe-resource lists and returns threat types and cache durations in JSON or protocol-buffer form.
Free tier: All Safe Browsing API use is free of charge for non-commercial purposes. Google assigns a default quota when the API is enabled; the current allocation is visible in Developer Console and additional quota can be requested. v5 urls.search accepts at most 50 URLs per request.
TweetFeed IOC Feed and API
TweetFeed aggregates community-posted indicators from Twitter/X and exposes URLs, domains, IPs, MD5 and SHA-256 hashes with timestamps, reporter handles, tags and source-post links through JSON REST responses plus CSV, TXT, RSS, MISP and STIX files.
Free tier: All feeds and REST endpoints are public without registration or a key. API responses cap at 10,000 rows; today, week and filtered variants are stated to remain below the cap, while the full month CSV is uncapped. Availability is not committed.
Cisco Snort Community Rules
Cisco publishes free Snort 3 community network-detection rules as a gzip-compressed tar archive containing a rules file, SID map, authors and licence files.
Free tier: The Snort 3 Community Rules archive downloads without an account or key. No download cap or update schedule is stated.
Disposable Email Domains blocklist
This community project publishes a newline-delimited blocklist of disposable and temporary email domains used for account-abuse screening.
Free tier: The blocklist is a public raw text file with no account or key. No project-specific download cap is stated.
CrowdSec CTI API
CrowdSec's REST CTI API returns JSON IP-reputation intelligence from its deployment network, including reputation, behaviors, attack history, geography, network ownership and associated CVEs.
Free tier: One Community CTI API key with 120 IP queries per month. Unused quota does not roll over, and self-service keys do not provide programmatic Lucene-style bulk search.
Cisco PSIRT openVuln API
Cisco's PSIRT openVuln REST API returns Cisco security-advisory data in JSON or XML, with advisory IDs, CVEs, bug IDs, product names, severity, CVSS, publication and update times, summaries, status and CSAF links.
Free tier: Cisco DevNet registration has no charge. Each registered application receives client credentials and is limited by the documented default quotas of 5 calls/second, 30 calls/minute and 5,000 calls/day.
Binary Defense Artillery Banlist
Binary Defense publishes the Artillery threat-intelligence banlist as a keyless plain-text file containing one IPv4 address per non-comment line.
Free tier: The plain-text feed downloads without an account or key. Use is limited to personal, non-commercial public use; no download cap is stated.
Fraunhofer FKIE Malpedia
Fraunhofer FKIE's Malpedia REST API exposes JSON metadata for malware families and threat actors plus references, MISP-formatted data and public YARA rules, with fields such as names, aliases, descriptions, attribution, source URLs, UUIDs and update dates.
Free tier: Keyless access includes public family and actor metadata, references, MISP data, version information and public YARA rules. Invite-only registration is required for sample information, sample lists and non-public YARA; this catalog entry excludes all sample access.
urlscan.io API
urlscan.io exposes JSON APIs to search community website scans, submit URLs for sandboxed scanning and retrieve result metadata, screenshots or DOM snapshots; result fields include the tasked URL, UUID, visibility, page IP and domain, requests, certificates, hashes, technologies, statistics and verdicts.
Free tier: Free community account with action-specific minute, hour and day quotas shown in the account and quota endpoint; unauthenticated users receive minor quotas. Search, submission visibility and feature access vary by plan.
VirusTotal Public API v3
VirusTotal Public API v3 returns JSON reports for files by hash, URLs, domains and IP addresses, including multi-engine analysis statistics, reputation, categories, timestamps, DNS or network context and relationships available to the public tier.
Free tier: Free Community API key; 4 requests per minute and 500 requests per day; basic public endpoints only; no sandbox data, advanced search or public-tier SLA.
Censys Platform API
Censys Platform returns JSON records for public-facing hosts, web properties and certificates, with fields such as IP, services, ports, software, TLS, DNS, routing and scan time.
Free tier: Free account: lookup endpoints only for hosts, web properties and certificates; basic data; no host history; 100 credits per month plus five free Platform API or UI actions per day; one concurrent action.
C2IntelFeeds
Keyless C2IntelFeeds CSV, JSON and plain-text feeds describe suspected or confirmed command-and-control IPs, domains, hostnames, URL paths, IP-port pairs and configuration metadata.
Free tier: Keyless feed files are free for non-commercial use under CC BY-NC-SA 4.0; 7-day, 30-day and 90-day variants are available for many feeds.
Neo23x0 Signature-Base
Signature-Base is a keyless repository of YARA detection rules and simple IOC files used by the LOKI and THOR Lite scanners.
Free tier: The public repository downloads without a key. The repository README points to a separate commercial rule set with more rules, but states no limit on the public files.
MITRE ATT&CK® STIX Data
MITRE ATT&CK® is MITRE's knowledge base of adversary tactics and techniques "based on real-world observations", published as STIX 2.1 JSON bundles for the Enterprise, Mobile and ICS domains, with a read-only TAXII 2.1 server and Excel exports built from the same data.
Free tier: Keyless STIX 2.1 JSON bundles for every release on GitHub, a read-only TAXII 2.1 server and Excel exports. The current Enterprise bundle was about 55 MB on 2026-11-03.
ENISA EU Vulnerability Database API
The European Union Agency for Cybersecurity's EU Vulnerability Database (EUVD) is the official EU repository for vulnerability intelligence.
Free tier: Keyless JSON endpoints for recent, critical and exploited vulnerabilities plus search and record lookup. No request quota or history limit was stated.
CVE List V5
The CVE Program's cvelistV5 repository is the supported bulk distribution of CVE Records in CVE JSON 5.x format.
Free tier: Keyless git repository, one JSON file per CVE Record, daily baseline release ZIPs, hourly delta ZIPs and a rolling delta log. No download quota is stated.
GitHub Advisory Database
GitHub publishes its security-advisory database as individual OSV-format JSON files in a public repository.
Free tier: The full public git repository can be cloned without an account. GitHub's unauthenticated REST API is limited separately; repository download limits are not stated on the database page.
Note on IEX Cloud
IEX Cloud was a popular free market data API but was discontinued on August 31, 2024. Former users have migrated to alternatives like Tiingo, Alpha Vantage, and Twelve Data.
Frequently Asked Questions
Is Yahoo Finance data legal to use?
Yahoo Finance is an unofficial data source (no official API). Yahoo's Terms of Service prohibit accessing or collecting data from its services "using any automated means … including but not limited to robots, spiders, scrapers … for any purpose without our express, prior permission." Libraries like yfinance are not affiliated with Yahoo. Always check the provider's current terms. This isn't legal advice.
Which free stock APIs need no API key?
According to our catalog, the following sources have auth: "none":
- Yahoo Finance
- World Bank Open Data
- SEC EDGAR APIs
- Kenneth French Data Library
- U.S. Bureau of Labor Statistics (BLS) Public Data API (v1)
Check the provider's terms; this isn't legal advice.
Can I use free-tier data commercially?
Not always. Many free tiers restrict commercial use:
- Tiingo free tier: internal/personal use only
- Twelve Data free Basic: testing, evaluation and development only. No display to users, external sharing, production use, or commercial use.
- Finnhub free plan: personal use
- FinBERT: CC BY-NC-SA 4.0 (non-commercial)
Always check each provider's license and terms. This isn't legal advice.
Is FRED data public domain?
It depends on the series. FRED's Legal Terms say a series has one of three copyright statuses: "Copyrighted: Pre-approval required", "Copyrighted: Citation required" or "Public Domain: Citation requested". FRED's FAQ says: "Before using data with a copyright notice for anything other than your own personal use, you must contact the data owner to obtain permission." The same Legal Terms prohibit using the FRED® API "in connection with storing, caching, or archiving any portion of the FRED® Services or FRED® Content" and "in connection with the development or training of any software program or system or machine learning, including, but not limited to, large language models" (https://fred.stlouisfed.org/legal/, read Oct 24, 2026). FRED API users must display: "This product uses the FRED® API but is not endorsed or certified by the Federal Reserve Bank of St. Louis." This isn't legal advice.
What does "verified" mean on Signal Lab?
"Verified" means we checked the entry against the provider's own pages for: free access, authentication requirements, rate limits, license terms, and links. The verification date is shown only when it passed. Entries showing "Needs review" haven't been verified yet. Verified status doesn't constitute legal advice.
Can I save Tiingo data on the free plan?
No. Tiingo's terms (updated Oct 6, 2026) say Starter and trial users "may not write, save, archive, back up, or otherwise retain Tiingo Data in any persistent or durable storage". You can only process it in memory and must delete it once the calculation is done. If your backtest needs stored history, use a source that allows it, or a paid Tiingo plan. Source: https://app.tiingo.com/tos/ (§1.6(a), checked Oct 18, 2026)
Is there a machine-readable list for AI agents?
Yes! Signal Lab provides multiple formats:
- /catalog.json — full JSON catalog
- /catalog.csv — CSV format
- /llms.txt — compact text
- /llms-full.txt — detailed text
- /agents — agent-friendly page
All formats are generated from the same verified data.