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Web Accessibility-Testing MCP Server (A11y MCP)

@ronantakizawa

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Web Accessibility-Testing MCP Server (A11y MCP) について

MCP Server for Web Accessibility Testing (10k+ Downloads, #20 on ProductHunt)

#mcp#a11y#a11y-testing#accessibility-testing

基本情報

カテゴリ

その他

ライセンス

MIT

ランタイム

node

トランスポート

stdio

公開者

ronantakizawa

設定

以下の設定を使って、このサーバーを MCP 対応クライアントに追加してください。

{
  "mcpServers": {
    "a11y-accessibility": {
      "command": "npx",
      "args": [
        "-y",
        "a11y-mcp-server"
      ]
    }
  }
}

ツール

ツールは検出されませんでした

ツールは README から自動的に抽出されます。メンテナーは ## Tools という見出しの下に記載することで、このタブに反映できます。

概要

What is Web Accessibility-Testing MCP Server (A11y MCP)?

An MCP (Model Context Protocol) server that gives LLMs access to web accessibility testing APIs. It uses the Deque Axe-core API and Puppeteer to analyze web content for WCAG compliance and identify accessibility issues.

How to use Web Accessibility-Testing MCP Server (A11y MCP)?

Install Node.js 18 or later, then configure the server in your MCP-compatible client (e.g., Claude Desktop, Claude Code, VS Code, Cursor, Windsurf) by adding "command": "npx", "args": ["-y", "a11y-mcp-server"] to the client's MCP configuration.

Key features of Web Accessibility-Testing MCP Server (A11y MCP)

  • Test any public URL for accessibility issues.
  • Test raw HTML strings for accessibility issues.
  • Check content against WCAG 2.0, 2.1, and 2.2 standards.
  • Explore and filter available accessibility rules.
  • Analyze color combinations for WCAG contrast compliance.
  • Validate correct usage of ARIA attributes.
  • Detect content that forces specific screen orientations.

Use cases of Web Accessibility-Testing MCP Server (A11y MCP)

  • Audit a live web page for WCAG 2.1 AA violations during development.
  • Check an HTML snippet for accessibility issues before deploying.
  • Verify color contrast ratios meet WCAG thresholds using an LLM.
  • Validate ARIA attribute usage in dynamically generated HTML.
  • Test how content behaves across desktop and mobile viewport sizes.

FAQ from Web Accessibility-Testing MCP Server (A11y MCP)

What runtime does the server require?

Node.js 18 or later.

Which clients can I use with this server?

Any MCP-compatible client, including Claude Desktop, Claude Code, VS Code, Cursor, and Windsurf.

Does the server send data to an external service?

No. Testing is performed locally by the server using Puppeteer and the Axe-core library.

What accessibility standards are supported?

WCAG 2.0 (Levels A, AA, AAA), WCAG 2.1 (Levels A, AA), WCAG 2.2 Level AA, and best-practice rules.

Is this an official Deque Labs product?

No. This is not an official MCP server from Deque Labs.

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