Euroa11y MCP Server

EuroA11y

EuroA11y is a free remote MCP server for ChatGPT, Claude and other MCP clients. It has two read-only tools: an automated accessibility scan of one public web page (WCAG 2.2 level AA, with axe-core) and a check of whether the European Accessibility Act (EAA) applies to a business. No account, no authentication.

• Connector URL (Streamable HTTP, no authentication): https://euroa11y.com/mcp
• Website and setup steps for Claude and ChatGPT: euroa11y.com, documentation
• Published by Antoine Olivier (France). Independent, not affiliated with the European Union or any EU institution.

Tools

• scan_page loads one public page in a headless Chromium browser, runs axe-core against WCAG 2.2 level AA and returns the failures grouped by WCAG success criterion, most severe first, with the failing elements and how to fix them. Parameters: url (required), viewport (desktop or mobile), include_rgaa (adds the related criteria of RGAA 4.1.2, the French framework), include_best_practices, max_examples (1 to 5), fresh (scan again instead of reusing a recent result). A scan usually takes 5 to 30 seconds.
• check_eaa_scope applies the scope rules of Directive (EU) 2019/882, applicable since 28 June 2025, to the service, headcount and turnover given, including the exemption for microenterprises. It returns a verdict (in_scope, terminals_only, exempt_microenterprise, out_of_scope, public_sector_other_law or need_more_info) with its reasons and legal sources. No network access, nothing stored. Information, not legal advice.

Example prompts:

• Check the accessibility of https://www.gov.uk on mobile
• Which RGAA criteria does my home page fail? https://example.fr
• I run an online shop with 6 employees. Does the EAA apply to me?

Limits

• Automated tools detect only part of accessibility issues. A scan with no failure does not mean the page is accessible or compliant; a conformance claim or an accessibility statement needs a manual audit.
• One public page per call, main document only (no iframe), no login, no form submission. Pages behind bot protection may refuse the scan.
• Fair-use limits keep the hosted service free: for each ChatGPT account or network address, one scan at a time and 40 a day.
• The raw result of a scan, which includes the page address, is kept up to 24 hours, encrypted, to answer the same request again. Logs hold no page address and no argument. Details: privacy policy.

Development

Requires Node.js (see engines in package.json).

npm ci
npm run check
node src/cli.ts https://www.gov.uk --rgaa

• npm run check runs the type checks and the tests. git config core.hooksPath .githooks runs it before each commit.
• npm run mcp:http starts the MCP server over HTTP on this machine, with Node.
• The hosted service is a Cloudflare Worker (src/worker/, wrangler.jsonc) that scans in Cloudflare Browser Run, which needs the Workers Paid plan. To deploy your own copy, change the route in wrangler.jsonc to your domain. node scripts/smoke.mjs <base URL> checks the Worker's routes without running a scan.

Safeguards in the code: private, local and reserved addresses are refused for the page and each redirect, the scan is bounded in time and requests, the daily browser time has a global budget, and only rules from the bundled axe-core catalogue are kept in a report, since the scanned page can tamper with axe's results.

Data and credits

• axe-core by Deque Systems (MPL-2.0) runs the WCAG checks.
• data/rgaa-4.1.2-wcag.json maps RGAA 4.1.2 criteria to WCAG references, from the source repository of accessibilite.numerique.gouv.fr (RGAA/criteres.json and the criteria annexes). RGAA 4.1.2 follows WCAG 2.1: criteria new in WCAG 2.2 have no RGAA equivalent.
• Fonts: Atkinson Hyperlegible Next and Mono (SIL Open Font License, files in assets/fonts/).

License

MIT, see LICENSE. Contact: contact@euroa11y.com