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io.github.mertcanvural/overlayrisk-witness

Registre officiel Autres

Independent before/after accessibility-overlay (accessiBe/UserWay) witness for any public URL.

Code source Site web Documentation

Installation

Ajoutez ceci à la configuration MCP de votre client (Claude Desktop : claude_desktop_config.json ; Cursor : .cursor/mcp.json ; VS Code et les autres utilisent la même forme « mcpServers »).

NPM package overlayrisk-witness-mcp
Claude Code 
claude mcp add overlayrisk-witness -e 'OVERLAYRISK_API_URL=<OVERLAYRISK_API_URL>' -- npx -y overlayrisk-witness-mcp@0.1.0
Configuration JSON (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "overlayrisk-witness": {
            "command": "npx",
            "args": [
                "-y",
                "overlayrisk-witness-mcp@0.1.0"
            ],
            "env": {
                "OVERLAYRISK_API_URL": "<OVERLAYRISK_API_URL>"
            }
        }
    }
}

Variables d'environnement

  • OVERLAYRISK_API_URL Override the hosted witness endpoint (defaults to https://overlayrisk.com/api/witness).

Documentation

Tirée du README du projet sur GitHub, actualisée chaque semaine. Les liens ouvrent GitHub.

Sommaire
  1. OverlayRiskWitness MCP server
  2. What this server is (and isn't)
  3. Tool
  4. Install
  5. Configuration
  6. Develop
  7. License

OverlayRiskWitness MCP server

A Model Context Protocol server that runs the free, independent before/after accessibility-overlay witness from OverlayRiskWitness on any public URL.

Accessibility overlay widgets (accessiBe, UserWay, and similar) are sold as one-line ADA/WCAG compliance fixes, but independent testing routinely shows the underlying page is unchanged for real assistive-technology users. This server lets an AI agent run the witness: it loads a page with the overlay on, then off, captures both states, and returns one documented finding where the page's public accessibility/compliance claims don't hold up — with a UTC timestamp.

Findings are evidence, not a legal compliance ruling. This server is independent of accessiBe and UserWay; it tests their effect, it does not sell or defend an overlay.

What this server is (and isn't)

This is a thin client. It contains no scanning logic and no secrets. Its single tool POSTs to the hosted API at https://overlayrisk.com/api/witness, which does the real work (overlay detection, headless before/after capture, claim extraction). The full timestamped Risk Packet is a paid checkout on the website — see overlayrisk.com/pricing. The MCP server is a free funnel; it never handles payment.

Tool

witness_page
Input{ "url": "https://example.com/checkout" } — a public HTTP/HTTPS page URL
SuccessThe free-witness JSON: runId, siteUrl, overlayVendor (accessibe/userway), pagesTested, claimsTested, didNotHoldUp, freeFinding, lockedFindingCount — plus a note linking to the paid Risk Packet
Error{ status, code, error } (e.g. overlay_no_effect, page_fetch_failed, witness_timeout)

A single witness run can take up to ~3 minutes on cold/heavy sites. That exceeds many MCP clients' default 60s request timeout. The server emits periodic progress notifications, so clients that honor resetTimeoutOnProgress stay connected automatically; clients that don't should raise their per-request timeout.

Install

Run directly with npx (no global install):

npx overlayrisk-witness-mcp

The process speaks MCP over stdio.

Claude Desktop / Cursor / other MCP clients

Add to your client's MCP config:

{
  "mcpServers": {
    "overlayrisk-witness": {
      "command": "npx",
      "args": ["-y", "overlayrisk-witness-mcp"]
    }
  }
}

Configuration

Env varDefaultPurpose
OVERLAYRISK_API_URLhttps://overlayrisk.com/api/witnessOverride the witness endpoint (e.g. for local dev)
OVERLAYRISK_TIMEOUT_MS200000Request timeout in ms

No API key is required — the free one-page witness is public.

Develop

npm install
npm run smoke   # offline handshake test (lists tools, no network)
npm start       # run the server on stdio

License

MIT © Mert Can Vural

Questions fréquentes

Qu'est-ce que io.github.mertcanvural/overlayrisk-witness ?

Independent before/after accessibility-overlay (accessiBe/UserWay) witness for any public URL.

Comment installer io.github.mertcanvural/overlayrisk-witness ?

Il s'exécute sur votre machine. Dans Claude Code : claude mcp add overlayrisk-witness -e 'OVERLAYRISK_API_URL=<OVERLAYRISK_API_URL>' -- npx -y overlayrisk-witness-mcp@0.1.0. Pour les autres clients, collez la configuration JSON de cette page dans leurs réglages MCP.

Faut-il une clé API pour io.github.mertcanvural/overlayrisk-witness ?

Son entrée au registre n'indique aucune clé ni secret obligatoire. Certaines fonctions peuvent tout de même demander un compte auprès du service auquel il se connecte.

io.github.mertcanvural/overlayrisk-witness est-il open source ?

Oui. Son code est sur GitHub sous licence MIT.

Qui maintient io.github.mertcanvural/overlayrisk-witness ?

Il est publié par mertcanvural. AI.tn le référence sans le maintenir ni le recommander.

Issu du registre MCP officiel. Être listé n'est pas une recommandation : vérifiez le code et les permissions d'un serveur avant de lui donner accès à vos données.