Next free-source huntWe check for new free data every weekday.
FinancialMCP serverFirst audited Nov 13, 2026

Signal8

SEC filings, dilution, insider & institutional ownership, and political-trade data for AI agents.The vendor's description, from its MCP Registry listing.

Passed, with 1 warningAudited Nov 13, 2026
  • Warning: Tool definitions changed since the last audit (2026-11-13).

Nothing failed, but there is something to know or fix. Public audit: we connect as an AI client would, list the tools and check what they say. We do not run them. How we audit

Does it work?
YesConnected in 289 ms.
Sign-up?
None neededIt answered without any account or key.
Can it change things?
No, read-onlyAll 113 tools say they only read.
Endpointhttps://mcp.signal8.ai/mcp

Source code Website Streamable HTTP · protocol 2025-11-25 · server version 0.20.0

What we checked, the evidence, and the tools it offers.

What we checked

Security

  • Warning: Tool definitions changed since the last audit (2026-11-13).

    Usually a normal update. It is listed because a tool that changes after people approve it is a known attack (a "rug pull"): review what changed before relying on it.

    • same tool names; descriptions or inputs changed
  • Passed: Connections are encrypted (HTTPS).

  • Passed: No hidden instructions found in tool text.

Safety labels

  • Passed: Every tool says whether it only reads or can change things.

Tools

  • Note: Some tool text is long, so it uses more of the AI's working memory.

    • server instructions (5,262 characters)
    • get_float (4,986 characters)
    • get_dilution_risk (4,056 characters)
    • get_dilution_snapshot (4,009 characters)
    • get_reverse_splits_list (6,401 characters)
  • Passed: 113 tools listed.

  • Passed: Every tool describes its inputs with a valid schema.

Protocol

  • Passed: The MCP handshake works (Streamable HTTP).

  • Passed: Protocol version 2025-11-25 (latest).

  • Passed: Unknown requests are refused.

Connection

  • Passed: The server responds.

Tools (113)

As the server describes them. The labels are the server's own: it says whether each tool only reads or can change things.

  • search_companiesSearch for companies by name or ticker symbol in the Signal8 database. Returns matching companies with their ticker, name, CIK, and exchange.Read-only
  • get_company_profileGet an enriched company profile by ticker symbol. Returns CIK, exchange, sector, industry, market cap, employee count, description, and other fundamental data in a lightweight response. Includes halt…Read-only
  • get_quoteGet the current stock quote for a company: price, volume, change, market cap and other real-time market data. Trading-halt fields halted, haltCode, haltReason, haltedAt and resumptionAt are present o…Read-only
  • get_market_metricsGet computed market metrics for a company: volume averages, volatility, simple moving averages, RSI(14) on split-adjusted daily closes (rsi14, with the session it is as of in rsi14AsOf; null = not me…Read-only
  • get_short_interestGet short interest data for a company: short volume, short ratio, days to cover and short percent of float. A null `shortInterestPercent` always carries `shortInterestPercentReason`: "float_not_point…Read-only
  • get_floatGet float data for a company: floatShares, floatDefinition, the as-of date and, when the headline float is withheld, the bounds and labelled stand-ins that replace it. Null, absent or withheld means…Read-only
  • get_float_historyGet the point-in-time float history for a company: one sample per trade date (float shares, shares outstanding, and the source the float came from), showing the float on a past date and how it expand…Read-only
  • get_historical_pricesGet historical OHLCV price candles for a stock at daily, weekly or monthly resolution, for a period shorthand (1M, 3M, 6M, 1Y, 5Y or the full history) or an explicit from/to UNIX timestamp window. Th…Read-only
  • get_stock_price_changeGet percentage price changes for a stock across multiple timeframes (1D, 5D, 1M, 3M, 6M, YTD, 1Y, 3Y, 5Y, 10Y and MAX) without full candle data.Read-only
  • get_financialsGet income statement, balance sheet and cash flow data for a company (revenue, profitability, debt, cash position) from SEC XBRL filings. The response carries BOTH the annual and the quarterly series…Read-only
  • get_earningsGet historical earnings data for a company: EPS actual vs estimate, revenue actual vs estimate, and surprise percentages (beats and misses).Read-only
  • get_executivesGet the key executives and officers of a company: name, title, compensation and tenure.Read-only
  • get_newsGet recent news articles, press releases and AI-analysed SEC filings for a company. Filing rows (category "sec_filing") are event-bearing forms only (8-K, 6-K, 424B prospectus supplements, S-1/F-1, 1…Read-only
  • get_analyst_consensusGet the analyst ratings consensus for a company: average target price, number of analysts, buy/hold/sell breakdown and consensus recommendation.Read-only
  • get_analyst_estimatesGet forward analyst estimates for a company: EPS, revenue, EBITDA and net income (low/high/avg) with analyst counts, for annual or quarterly periods.Read-only
  • get_clinical_trialsGet the ClinicalTrials.gov trials Signal8 has matched to a company: phase, status, conditions, interventions and key dates. The list includes trials the company leads and trials where it is only a co…Read-only
  • search_clinical_trialsSearch clinical trials market-wide (across companies), filtered by phase, indication, sponsor, status and date window, with sorting and pagination. An unrecognised phase, status, dateField or sort va…Read-only
  • get_top_moversTop stock movers: gainers (largest % up), losers (largest % down), or active (highest volume). Optional session window (premarket / regular / afterhours; regular default; not supported for active). A…Read-only
  • get_market_newsGet the latest market-wide news across all tickers, most recent first (not filtered to one company). Every item is significance-classified at ingest (critical | major | standard); the default filter…Read-only
  • get_market_breadthGet market breadth aggregates (advance/decline counts and ratio, percent of constituents above their 50DMA and 200DMA, and counts of new 52-week highs/lows) for a chosen universe (sp500, ndx, or all)…Read-only
  • get_trading_haltsList securities currently halted across NASDAQ/NYSE/AMEX (from the consolidated Nasdaq Trader halt feed). Each halt includes ticker, market, haltCode (T1/T2/T12/LUDP/H10/...), human-readable reason,…Read-only
  • get_earnings_calendarGet upcoming and recent earnings releases between two dates. Optionally restrict to a list of tickers. Returns ticker, date, time (BMO/AMC), EPS estimate, and revenue estimate when available. Support…Read-only
  • get_economic_calendarGet scheduled macro/economic events (CPI, FOMC, jobs reports, GDP, etc.) between two dates. Optionally filter to a single country (ISO-3166 alpha-2, e.g. "US"). Defaults to US when omitted. One call…Read-only
  • get_filing_calendarGet the forward-looking 10-K / 10-Q SEC filing-deadline calendar within a date window. Optionally restrict to a universe (sp500/ndx/dji/all) and/or a list of form types (default both 10-K and 10-Q).Read-only
  • get_post_earnings_moversGet stocks that moved significantly after earnings reports on a given date. Returns pre-computed price changes joined with earnings surprise data, one row per ticker. Includes preEarningsClose, curre…Read-only
  • get_recent_material_filingsRecent material 8-K filings (last 7 days) for the constituents of an index universe. By default returns the high-signal 8-K item codes (material agreements, M&A, executive changes, restructurings, et…Read-only
  • screen_sec_filingsScreen SEC filings across all companies with company-level filters (sector, industry, market cap, exchange) combined with filing-level filters (form type, date range). Returns filings enriched with c…Read-only
  • search_sec_filingsSearch and list SEC filings by company (CIK), form type, date range, 8-K item codes and excluded forms, optionally with a full-text query over filing bodies and by company facts (market cap, float, p…Read-only
  • get_filing_documentsList every document in one SEC filing by accession number (the primary document, each exhibit, XML and XBRL files, graphics) with seq, type (e.g. "8-K", "EX-99.1"), description, size in bytes, `store…Read-only
  • get_filing_structuredParsed, machine-readable data from an ownership or holdings filing, by accession number. `kind`: "ownership" (Form 3/4/5 and amendments): issuer, reporting owners with relationship (director, officer…Read-only
  • get_filing_documentGet the full raw text/HTML content of an SEC filing by its internal filing ID (the `id` on filing search rows, or `filingId` from an accession-number lookup or a filing's document list). Returns the…Read-only
  • get_filing_exhibitsList the readable exhibits (individual documents with stored text) within an SEC filing, by internal filing ID. Returns each exhibit's `id` (the exhibit id for reading that exhibit's text), exhibit t…Read-only
  • get_exhibit_contentGet the full text/HTML content of a single exhibit from an SEC filing, by exhibit id. Returns the exhibit text along with exhibit_type, description, company_name, accession_number, and form_type. max…Read-only
  • search_filing_textFull-text search across SEC filing content that returns the matching passage: one match per filing, with the exhibit it was found in (`exhibit_id`, `exhibit_type`) and a snippet with context. Query s…Read-only
  • lookup_accession_numberLook up a filing or exhibit by its SEC accession number. Supports both dashed format (e.g., "0001193125-22-010026") and compact 18-digit format. Returns filing metadata including company name, form t…Read-only
  • screen_sec_filings_performanceAnalyze stock price performance after SEC filings. Returns individual filing records with pre-computed price returns at +1 day, +3 days, +7 days, and +30 days after the filing date (numbers in percen…Read-only
  • get_insidersGet insider trading discovery data for a company. Includes cluster buying detection, entity-centric insider model, and Form 4 cross-referencing. Shows insider transactions with buying/selling pattern…Read-only
  • get_ownershipGet the unified ownership breakdown for a company, combining Form 4 insider holdings, 13F institutional holdings and 13D/13G activist positions, resolved across the three form types into one view. al…Read-only
  • get_institutionsGet institutional holders (13F filers) for a company. Returns institutions that hold positions in this stock based on SEC 13F filings, including shares held, portfolio weight, and filing dates. Usefu…Read-only
  • get_institution_detailGet detailed information about a specific institutional investor by their SEC CIK number. Returns the institution name, total AUM, number of holdings, and filing history. Takes the institution's CIK.Read-only
  • get_institution_holdingsGet the full portfolio holdings for a specific institution by CIK. Returns all positions from their latest 13F filing with shares, value, and portfolio weight. Supports pagination for institutions wi…Read-only
  • get_institution_position_changesDiff two quarterly 13F snapshots for an institution. Compares the latest filing against the prior quarter and returns per-position changes: new positions, increased, decreased, and exited. Sorted by…Read-only
  • get_institution_activityGet an institution's position changes over recent 13F periods by CIK. Reads the number of trailing periods to include.Read-only
  • get_institution_filingsGet the list of 13F filings for an institution by CIK, with pagination.Read-only
  • get_institution_derivativesGet an institution's reported put/call derivative positions by CIK (13F options), with pagination and sorting.Read-only
  • get_institution_portfolio_analyticsGet sector allocation and top holdings analytics for an institution's portfolio by CIK.Read-only
  • get_institutions_leaderboardsTwo market-wide institution leaderboards in one call: topByAum (largest holders by assets under management, name-deduped) and mostActive (highest 13F position-change volume). No CIK required. Each se…Read-only
  • get_insider_transactionsGet detailed insider transaction history for a company from Form 4 filings. Returns individual buy/sell transactions with insider name, title, shares, price, and transaction codes. Supports paginatio…Read-only
  • get_insider_cluster_buysDetect cluster buying for a company: periods where 3+ distinct insiders bought shares (Form 4 open-market purchases, code P) within a 14-day window, over a lookback of 7, 30 or 90 days (default 90).…Read-only
  • get_institution_top_aumDiscover top institutional holders across the entire company universe ranked by assets under management (AUM), across all companies rather than for a single company. Optionally set a minimum AUM. Use…Read-only
  • search_institutionsSearch institutional investors (13F filers) by name. Returns matching institutions with CIK, name, AUM, holdings count, and latest filing period. Matches part of a fund or investment manager name (e.…Read-only
  • get_insider_cross_companyDiscover insider trading patterns across multiple companies (the whole universe, not a single ticker): insiders active across multiple companies, cluster buying patterns, and large transactions. Opti…Read-only
  • get_complianceGet full compliance rules evaluation for a company: Nasdaq/NYSE deficiency detection, bid price tracking, and delinquent filing detection, combining SEC filing data, market data and exchange rules. R…Read-only
  • screen_companiesScreen companies by price range, volume, cash runway, float, shares outstanding, market cap, industry, listing exchange (NASDAQ/NYSE/AMEX), listing market (market="otc" / "exchange"; the reliable OTC…Read-only
  • get_premarket_scan_historyHistorical market-wide premarket scan for one past ET trade date: every ticker with that day's premarket (default) session volume and its RVOL vs the trailing 30-day same-session baseline (the same p…Read-only
  • get_split_historyGet stock split history for a company including forward and reverse splits with dates, ratios, type classification, and cumulative 2-year reverse split ratio. Relevant for Nasdaq/NYSE minimum bid-pri…Read-only
  • get_split_performanceGet how one ticker's price moved in the N calendar days after each stock split it already executed (forward or reverse), newest first, up to 30 splits, in one call. Past executed splits only: upcomin…Read-only
  • get_etf_bundleGet aggregated ETF data in a single call. Combines multiple data sources (profile, holdings, sector weightings, country exposure, performance, news, analyst coverage, and comparables) into one respon…Read-only
  • get_politiciansList and search congressional politicians who have STOCK Act trading disclosures. Filter by party (D/R/I), state, or search by name. Returns paginated results with trade counts, last trade date, and…Read-only
  • get_politician_detailGet the full profile for a politician including party, state, chamber, trade statistics, filing delay metrics, most traded sector, and their 10 most recent transactions. The politician is identified…Read-only
  • get_politician_transactionsGet paginated trade history for a specific politician. Returns individual STOCK Act disclosures with ticker, transaction type, amount range, filing delay, and late filing flag. Includes a summary wit…Read-only
  • get_politician_activityGet activity metrics for a politician broken down by period (30d, 90d, 1y, all-time). Includes buy/sell counts and values per period, most traded tickers (top 10), and transaction type breakdown. Use…Read-only
  • get_politicians_most_activeDiscover the most active congressional traders ranked by trade count within a lookback period. Returns each politician with trade count, tickers traded, buy/sell values, and top tickers. Useful for i…Read-only
  • get_politician_recent_tradesGet recent STOCK Act trades across all politicians. Each trade includes the senator info, ticker, transaction type, amount, and filing delay. Filter by direction (buy/sell) and lookback period. Usefu…Read-only
  • get_politician_disclosuresPer-disclosure feed of politician trades: one item per congressional STOCK Act periodic transaction report (PTR) or executive-branch OGE Form 278-T that contains at least one trade whose bracket lowe…Read-only
  • get_politician_late_filersGet STOCK Act late filings: trades whose disclosure was filed more than 45 days after the transaction, the latest the STOCK Act allows. Lateness is a fact about the dates on the report, not a finding…Read-only
  • get_politician_committeesGet committee assignments for a politician including committee name, chamber, role (Chair, Ranking Member, etc.), and subcommittee memberships, for relating trading activity to committee oversight ar…Read-only
  • get_politician_votesGet voting records for a politician by slug. Returns congressional votes with bill info, position (Yea/Nay/Not Voting), and result. Useful for assessing alignment between a politician's votes and the…Read-only
  • get_politician_pnlGet estimated realized + unrealized profit & loss for a politician. Methodology: each disclosed trade amount range is converted to an estimated share count using the stock's historical market price o…Read-only
  • get_politicians_pnl_leaderboardRank politicians (Congress + executive branch) by estimated trading P&L across the universe. Sort by total P&L, win rate, or traded volume. P&L uses price-adjusted share estimation: disclosed amount…Read-only
  • get_politician_scorecardTop 5 and bottom 5 politicians (Congress + executive-branch officials) by estimated trading P&L over a trailing window (default and only supported window: 90 days), plus SPY's return over the same wi…Read-only
  • get_politician_rolesGet committee leadership roles (Chair, Ranking Member, etc.) for a politician, identified by URL slug (e.g. "sen-nancy-pelosi").Read-only
  • get_recent_congressional_votesGet recent congressional roll-call votes across all members, sourced from GovTrack (both chambers as available; currently Senate-heavy). Each vote includes member, bill info, position, and result.Read-only
  • get_recently_sponsored_billsGet the most recently introduced bills across all congressional sponsors. Each bill includes the sponsor block (bioguideId, fullName, party, state, politicianSlug) so persona agents can link directly…Read-only
  • get_political_sector_rotationWhich market sectors politicians have been trading in over a trailing window. Aggregates congressional + executive trades by sector and returns, per sector: trade count, total dollar volume, number o…Read-only
  • get_senate_trades_by_tickerReverse lookup: which politicians recently traded a given ticker. Returns recent STOCK Act disclosures for that symbol with politician info, transaction type, and amount, covering trades in the last…Read-only
  • get_cash_positionSignal8 cash position model for a company, derived from the dilution snapshot pipeline: anchor cash and anchor date, monthly burn, post-anchor capital raises (with SEC filing citations), known outflo…Read-only
  • get_cash_historyUp to 10 years of quarterly cash and cash equivalents for a company, as reported in its SEC XBRL financial statements (data.sec.gov). Returns `history`: one point per period end {periodEnd, usd, form…Read-only
  • screen_must_raiseCompanies with imminent capital raise needs based on estimated cash runway. Defaults to companies with less than 6 months of cash remaining, sorted by urgency (lowest runway first): distressed compan…Read-only
  • get_cash_runway_calendarCompanies projected to run out of cash within a date window, a cash-depletion counterpart to a lockup expiration calendar. Returns companies sorted by urgency (lowest runway first). Runway is an esti…Read-only
  • get_dilution_coverageCoverage pre-check for whether Signal8 holds a dilution analysis for a company (a lighter read than the full dilution payloads): coverage status (verified / stale / not_covered), extraction state (ne…Read-only
  • get_dilution_riskDilution pressure score: 0-100 with a seven-component breakdown (shelf capacity, ATM/equity-line capacity, warrants in the money, convertible proximity, cash burn urgency, historical dilution, toxic…Read-only
  • get_dilution_snapshotDilution snapshot header (the largest dilution payload): summary totals (potential new shares, their % of shares outstanding, per-family totals), the cash position (anchor cash, monthly burn, estimat…Read-only
  • get_dilution_instrumentsOne instrument family's rows with per-field SEC citations (accession number, filing date and the verbatim sentence each figure was read from). Families: warrants, convertibles, preferred, shelfs, atm…Read-only
  • get_baby_shelf_capacitySEC Form S-3 General Instruction I.B.6 "baby shelf" capacity: how much the issuer may raise off an effective shelf now, under the one-third-of-public-float cap that applies below a $75M non-affiliate…Read-only
  • get_dilution_performancePost-offering price performance: for each recorded offering, how the stock traded after it priced or closed, i.e. how the market absorbed this issuer's past financings. This is history, not a forecas…Read-only
  • get_dilution_historyShares outstanding and cash over time for one company, from its SEC XBRL filings, with the offerings and cash events from its dilution snapshot so each raise can be lined up against the share count a…Read-only
  • get_intraday_barsGet intraday OHLCV candles at 1, 5, 15, 30 or 60-minute resolution for intraday price action, volume patterns and short-term technical analysis. Each bar has open, high, low, close and volume. `exten…Read-only
  • get_volume_profileGet the volume distribution across price levels for a single trading day: price buckets with volume, the Point of Control (highest-volume level) and the Value Area (the price range containing 70% of…Read-only
  • get_accumulation_snapshotGet intraday accumulation/distribution metrics for the current or most recent trading session: session VWAP, volume above and below VWAP, estimated buy vs sell volume (tick rule), volume by time peri…Read-only
  • get_insider_positionsGet current open insider positions for a CIK (either an insider or an issuer). If an issuer (company) CIK is supplied, returns all insiders' positions for that company. If an insider (reporting-perso…Read-only
  • get_insider_positions_by_tickerGet per-insider position aggregates for a ticker: which insiders hold positions in the stock and their aggregate cost and value, derived from Form 4 filings. The figures are not lifetime totals: they…Read-only
  • get_analyst_gradesGet recent analyst grade actions (upgrades, downgrades, initiations) for a ticker, including the grading firm and previous/new grade.Read-only
  • get_price_targetGet analyst price target data for a ticker. By default returns the consensus / split-adjusted average price target. Set list=true to return the full per-analyst list of individual price targets inste…Read-only
  • get_analyst_coverageGet aggregated analyst coverage for a ticker: a consolidated view of grades, targets and coverage breadth across covering firms.Read-only
  • get_politician_donorsGet the paginated list of campaign donors (individuals and PACs) for a single politician across one election cycle: the full donor list behind questions like "who donated to <politician>". Returns do…Read-only
  • get_politician_donor_summaryGet a bundled donor summary for a single politician: cycle totals (raised, spent, cash-on-hand, debts), donor count, top 10 individual donors, and top 10 PAC donors, all in one response. Answers "who…Read-only
  • get_donor_aggregatesGet market-wide campaign-finance rollups across every tracked politician for a cycle: total raised, top 10 individual donors, top 10 PACs, party/chamber/cycle splits, and a most-funded politician lea…Read-only
  • get_policy_eventsList mirrored executive orders (policy events) from the Federal Register feed. Filterable by signing-date range, affected sector, or free-text title query. Each event includes its Federal Register do…Read-only
  • get_policy_trade_overlapFor a single politician, list trades that occurred within a window of days before or after the signing of an executive order affecting the traded sector. Each row contains the trade, the nearestEvent…Read-only
  • get_policy_trade_leaderboardRank politicians (Congress + executive branch) by trades that occurred near executive-order signings in sectors the orders affect, i.e. who trades most around policy activity. Each row includes the p…Read-only
  • get_legislative_calendarForward-looking legislative catalyst calendar: upcoming House/Senate floor votes (bills and Senate cloture motions) filtered to items that can move tickers. Each item includes the predicted vote wind…Read-only
  • get_rvol_historyGet the per-day relative-volume (RVOL) time series for a ticker, bucketed by trading session (premarket 04:00-09:30 ET, regular 09:30-16:00, afterhours 16:00-20:00, or all four). Each day's RVOL comp…Read-only
  • get_premarket_scannerGet the live premarket scanner board (premarket small-cap runners): top premarket gainers and losers by absolute gap %, each row enriched with rvol, marketCap, floatShares, short interest, dilution a…Read-only
  • get_upcoming_reverse_splitsReverse stock splits scheduled to take effect within a day-offset window of the current US market day, for companies under a market-cap ceiling. Offsets are days from today on the US market calendar:…Read-only
  • get_recent_uplistingsOTC-to-exchange uplistings that FINRA recorded on a given US market day, for companies under a market-cap ceiling. Each row carries the old OTC symbol, the resolved new exchange symbol (or null), a c…Read-only
  • get_reverse_split_lifecycleThe reverse-split lifecycle Signal8 has tracked from a company's own SEC filings (proxies, 8-K Items 3.03/5.03/5.07, 6-Ks): one episode per split authority, newest first, each with its state (propose…Read-only
  • get_ended_reverse_splitsReverse-split episodes across companies that ended without the split taking effect, from Signal8's SEC-filing tracker: outcome "vote_failed" (shareholders did not approve), "abandoned" (the company s…Read-only
  • get_reverse_split_authorityCompanies whose board still holds reverse-split authority it may use without another shareholder vote: an approval on file (shareholder vote or written consent; tracker states consent_pending, voted_…Read-only
  • get_reverse_splits_listThe cross-company reverse-split lists the Signal8 Reverse Splits page serves, one view per call. view "upcoming" = splits with an effective date from tomorrow through 30 US market days ahead, the ven…Read-only
  • search_learn_guidesFree: works without an API key or Pro plan (the hosted server only needs a signed-in account). Searches the Signal8 Academy (signal8.ai/learn): plain-English guides that explain dilution (ATMs, warra…Read-only
  • get_learn_guideFree: works without an API key or Pro plan (the hosted server only needs a signed-in account). One Signal8 Academy guide as Markdown, by track and slug (as returned by the Academy search, or from a s…Read-only
  • define_termFree: works without an API key or Pro plan (the hosted server only needs a signed-in account). Looks up a term in the Signal8 Academy glossary (signal8.ai/learn/glossary): dilution, SEC filing and tr…Read-only

Audit history

  1. Nov 13WarningsTools changed

What we sent

Every request in this audit, with the answer and how long it took. We never send credentials and never call a tool.

RequestAnswerTime
initializeHTTP 200289 ms
initializedHTTP 202561 ms
tools/listHTTP 200377 ms
resources/listHTTP 200287 ms
prompts/listHTTP 200150 ms
unknown-methodHTTP 401144 ms

Run this server, or disagree with the result?

Fix the issue and it shows in the next weekly audit, or email us to ask for a re-audit or to dispute a finding. Read how we audit for what each check means.