Webability MCP server

@webability/mcp

Accessibility testing MCP server for Cursor, VS Code Copilot, Claude Code, and any other MCP-compatible IDE.

What is WebAbility?

WebAbility.io is an AI-powered web accessibility platform — accessibility widget, automated scanner, and AI agents for WCAG 2.1 / 2.2 AA, ADA, Section 508, EAA (European Accessibility Act) and AODA compliance. This MCP exposes the same accessibility-testing engine that powers the WebAbility widget and dashboard, so you can scan, audit and fix web accessibility issues (color contrast, ARIA, alt text, keyboard navigation, focus visibility, target size, and more) from your IDE while you build.

New to accessibility compliance? Start with the free WCAG & ADA accessibility checker, or read the WebAbility MCP docs and the getting-started guide.

The server registers an instructions block on initialize, so any MCP-compatible client picks up business context (what tool to call when, the three-tier output convention, etc.) automatically — no setup required beyond the install below.

Why this over other accessibility MCPs

Most accessibility MCP servers stop at find and suggest. WebAbility closes the whole loop in your editor, and starts free:

• Free, local scan — no account, no Docker. scan_page runs entirely on your machine. (Deque's axe MCP needs a paid subscription, an API key, and a Docker install just to analyze a page.)
• Fixes that fit your stack. generateaifix returns ready-to-paste code for the framework you actually use — Tailwind, MUI, Bootstrap, WordPress, Next.js — not generic guidance.
• A vision pass DOM scanners can't do. visual_audit catches focus visibility, icon contrast, and "looks like a button but isn't" — issues axe-core structurally cannot see.
• Verification, not just detection. verify_fix re-checks that your fix actually landed and returns verified: true/false. Every 2026 comparison of accessibility MCPs names this the biggest gap in the category — most tools never close it.
• Evidence for compliance. start_audit produces a persistent, timestamped report and Excel workbook you can hand to an auditor — not a result that vanishes with your session.

The full cycle, without leaving the editor: scanpage → generateaifix → verifyfix, then start_audit when you need the paper trail.

Install

npm install -g @webability/mcp

Setup

Add to your IDE's MCP config:

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

Optional env: WEBABILITYAPIURL (default https://api.webability.io) for self-hosted backends.

Scan engines

scan_page runs three engines in parallel and deduplicates the results:

Three-tier output (since v1.2.1)

Every scan returns:

• issues — high-confidence violations, safe to surface as bugs
• incomplete — findings that need human review (contrast against gradients, marketing imagery, framer-motion pre-animation states, axe-incomplete). Never auto-fix these.
• summary — counts by severity + an incomplete count

Shortened. The full README is on GitHub.