WebAbility MCP Server

Why the WebAbility MCP

• Free to start — the scan and fix tools work with no account, no API key and no Docker.
• Fixes for your stack — ready-to-paste code for Tailwind, MUI, Bootstrap, WordPress or Next.js that you apply in your own project.
• A vision pass beyond axe — catches focus visibility, icon contrast and “looks like a button but isn’t” that DOM scanners can’t see.
• Verification, not just detection — verify_fix re-checks that your fix actually resolved the issue.
• Shareable proof, free — generate_report_pdf turns findings into a branded report you can attach to any ticket or email.
• Evidence when you need it — start_audit produces a timestamped report and Excel workbook.

Install

Every tool is free. The hosted server needs no API key: point your client at the URL below and the scan and check tools work straight away, under fair-use limits. Sign in with a free WebAbility account to lift the limits and unlock visual_audit, start_audit and get_audit. An AI agent with its own AgentMail inbox can sign up on its own: it chooses Sign in with AgentID on the WebAbility sign-in page (https://app.webability.io/auth/signin) and gets its own free account, with no human account or API key.

Hosted server, no key

Add this to your MCP client config (Cursor, Claude Code, VS Code, Windsurf):

{
  "mcpServers": {
    "webability": {
      "url": "https://mcp.webability.io/mcp"
    }
  }
}

This URL is anonymous by default. Calling visual_audit, start_audit or get_audit without signing in returns sign-in steps as a normal tool result. It does not disconnect your client.

Sign in

Use https://mcp.webability.io/mcp/auth when you want to sign in. It has the same tools, and it always asks for sign-in (401 and OAuth) until you are signed in.

• claude.ai and Claude Desktop: add https://mcp.webability.io/mcp/auth as a custom connector to use visual_audit and full audits. Use https://mcp.webability.io/mcp for the free scan tools only.
• Cursor and VS Code: use https://mcp.webability.io/mcp/auth as the url in your MCP config.
• Claude Code: run claude mcp login <server-name> (Claude Code 2.1 or later), or run /mcp inside Claude Code, choose the server and follow the browser sign-in steps.
• Codex: run codex mcp login <server-name>.
• opencode: run opencode mcp auth <server-name>.

<server-name> is the name you gave the server, for example webability.

Local server

Run the server on your machine over stdio. Add this to your IDE’s MCP config:

{
  "mcpServers": {
    "webability": { "command": "webability-mcp" }
  }
}

To use the account tools locally, install the CLI and sign in once. It opens your browser; no key to copy:

npm install -g @webability/cli
webability login

Published as @webability/cli and @webability/mcp on npm.

Tools

The find → fix → verify loop

The tools chain into one workflow inside your editor, which is what sets WebAbility apart from find-only accessibility tools:

scan_page  →  generate_ai_fix  →  (apply the fix)  →  verify_fix  /  diff_scan  →  generate_report_pdf  /  start_audit

scan_page finds the issues,generate_ai_fix gives you code for your framework,verify_fix confirms the fix landed,generate_report_pdf turns the findings into a branded PDF, andstart_audit produces the report you can hand to a compliance officer.

Accounts & pricing

Every tool is free. The DOM-based scan and fix tools need no account; generate_ai_fix and generate_report_pdf send the findings to api.webability.io for processing. The vision audit (visual_audit) and the full audit deliverable (start_audit / get_audit) run server-side and need a free WebAbility account. Sign in through the sign-in URL above, or run webability login for the local server.

Links

• @webability/cli on npm
• @webability/mcp on npm
• WebAbility platform
• All documentation