Research & Grey LiteratureDatasetNewAdded 2026-11-13

web-features and Baseline status data (W3C WebDX CG)

Web platform features with Baseline availability status

Freeauth: noneApache-2.0✓ verified Nov 13, 2026

Free?: FreeFree YAML and JSON files.
Sign-up?: None neededCall it straight away
Commercial use?: YesApache-2.0, with credit

The fine print

License note: Apache License 2.0 per the repository licence file. Signal Lab links only. Agent note: GitHub's Terms of Service (section D.9, Access Reciprocity) say "By using automated means to access, collect, or otherwise use (“Access”) any publicly accessible Content from the Service for the purpose of developing or training any commercially available artificial intelligence model, machine learning system, or similar technology (a "Commercial AI System"), you hereby waive any and all policies, terms, conditions, or contractual provisions governing products, services, websites or datasets you own or operate that would otherwise prohibit, restrict, or place conditions upon GitHub's Access to any publicly accessible data, information or content associated with your products or services, including for the purpose of developing or training any Commercial AI System."
Required attribution: Keep the Apache-2.0 licence and notices with copies.

Open github.com

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The short version. Switch to see exactly what an AI agent reads.

// Overview

web-features and Baseline status data (W3C WebDX CG)

The W3C WebDX Community Group publishes web-features, a catalog of web platform features with their Baseline status (newly or widely available) derived from browser compatibility data, as YAML and JSON.

Coverage

Web platform features with Baseline availability status.

Good for

#research-grey-literature#web-platform#browsers#baseline#files

Verdict

The Baseline status catalog for web features, alongside mdn-browser-compat-data. Licence: Apache-2.0: the repository licence file is the "Apache License Version 2.0, January 2004" text. The files are hosted on GitHub, whose Terms of Service say "these Terms do not restrict lawful access to or use of the contents of public repositories by third parties"; the Acceptable Use Policies limit excessive automated bulk activity, not ordinary reading of public files. GitHub's Access Reciprocity clause applies to automated collection for training a commercial AI system (see the licence note). Rate limits: Not stated. Signal Lab links only.

// Limits

Free limits & license

Price	Free
Auth	none
Free tier	Free YAML and JSON files.
Rate limit	Not stated.
License	Apache-2.0
License note	Apache License 2.0 per the repository licence file. Signal Lab links only. Agent note: GitHub's Terms of Service (section D.9, Access Reciprocity) say "By using automated means to access, collect, or otherwise use (“Access”) any publicly accessible Content from the Service for the purpose of developing or training any commercially available artificial intelligence model, machine learning system, or similar technology (a "Commercial AI System"), you hereby waive any and all policies, terms, conditions, or contractual provisions governing products, services, websites or datasets you own or operate that would otherwise prohibit, restrict, or place conditions upon GitHub's Access to any publicly accessible data, information or content associated with your products or services, including for the purpose of developing or training any Commercial AI System."
Last verified	Nov 13, 2026

Limits belong to the provider and can change. Always confirm on the evidence page.

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Quick facts

Provider: github.com
Type: Dataset
Category: Research & Grey Literature
Domain: Research & Grey Literature
Auth: none
Free tier: Free YAML and JSON files.
Rate limit: Not stated.
License: Apache-2.0
License note: Apache License 2.0 per the repository licence file. Signal Lab links only. Agent note: GitHub's Terms of Service (section D.9, Access Reciprocity) say "By using automated means to access, collect, or otherwise use (“Access”) any publicly accessible Content from the Service for the purpose of developing or training any commercially available artificial intelligence model, machine learning system, or similar technology (a "Commercial AI System"), you hereby waive any and all policies, terms, conditions, or contractual provisions governing products, services, websites or datasets you own or operate that would otherwise prohibit, restrict, or place conditions upon GitHub's Access to any publicly accessible data, information or content associated with your products or services, including for the purpose of developing or training any Commercial AI System."
Verified: Nov 13, 2026

Ask your agent

Fetch https://signal-lab.qdt.ai/catalog.json, find slug "web-features-baseline" and read its licenseNote. The files are Apache-2.0 and hosted on GitHub, whose terms do not restrict lawful access to public repository contents. GitHub's Terms of Service section D.9 (Access Reciprocity) say: "By using automated means to access, collect, or otherwise use (“Access”) any publicly accessible Content from the Service for the purpose of developing or training any commercially available artificial intelligence model, machine learning system, or similar technology (a "Commercial AI System"), you hereby waive any and all policies, terms, conditions, or contractual provisions governing products, services, websites or datasets you own or operate that would otherwise prohibit, restrict, or place conditions upon GitHub's Access to any publicly accessible data, information or content associated with your products or services, including for the purpose of developing or training any Commercial AI System." So if I use these files with automated means to develop or train a commercial AI system, tell me that clause applies. Otherwise, write code that downloads the web-features YAML file I name (for example https://raw.githubusercontent.com/web-platform-dx/web-features/main/features/grid.yml) when I run it, keep request volume modest, and keep the licence notice with any copies.

// Full record · catalog.json

name: web-features and Baseline status data (W3C WebDX CG)
slug: web-features-baseline
category: Research & Grey Literature
domain: Research & Grey Literature
type: Dataset
sitePageUrl: https://signal-lab.qdt.ai/datasets/web-features-baseline
providerUrl: https://github.com/web-platform-dx/web-features
badge: Free
auth: none
freeTierLimits: Free YAML and JSON files.
rateLimits: Not stated.
docsUrl: https://github.com/web-platform-dx/web-features
coverage: Web platform features with Baseline availability status.
lastVerified: 2026-11-13
evidenceUrls: https://github.com/web-platform-dx/web-features
https://raw.githubusercontent.com/web-platform-dx/web-features/main/features/grid.yml
https://github.com/web-platform-dx/web-features/blob/main/LICENSE.txt
https://docs.github.com/en/site-policy/github-terms/github-terms-of-service
https://docs.github.com/en/site-policy/acceptable-use-policies/github-acceptable-use-policies
tasks: research-grey-literature
web-platform
browsers
baseline
files
license: Apache-2.0
licenseUrl: https://github.com/web-platform-dx/web-features/blob/main/LICENSE.txt
licenseNote: Apache License 2.0 per the repository licence file. Signal Lab links only. Agent note: GitHub's Terms of Service (section D.9, Access Reciprocity) say "By using automated means to access, collect, or otherwise use (“Access”) any publicly accessible Content from the Service for the purpose of developing or training any commercially available artificial intelligence model, machine learning system, or similar technology (a "Commercial AI System"), you hereby waive any and all policies, terms, conditions, or contractual provisions governing products, services, websites or datasets you own or operate that would otherwise prohibit, restrict, or place conditions upon GitHub's Access to any publicly accessible data, information or content associated with your products or services, including for the purpose of developing or training any Commercial AI System."
attribution: Keep the Apache-2.0 licence and notices with copies.

// The same record over MCP

Request · get_entry

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "get_entry",
    "arguments": {
      "slug": "web-features-baseline"
    }
  }
}

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// Similar sources

web-features and Baseline status data (W3C WebDX CG)

Coverage

Good for

Verdict

Free limits & license

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// Full record · catalog.json

// The same record over MCP

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