@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. `generate_ai_fix` 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: `scan_page` → `generate_ai_fix` → `verify_fix`, 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: `WEBABILITY_API_URL` (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

This mirrors axe-core's `violations` / `incomplete` / `passes` split and prevents agents from "fixing" false positives in destructive ways.

Tools

When to use this MCP

• Building a new component and want it accessible from day one
• Auditing a localhost / staging build before pushing
• Triaging a Lighthouse / axe report — `scan_page` consolidates all three engines
• Generating fix suggestions that match the framework you're already using
• Checking color contrast against the user's actual brand palette (not generic suggestions)

Examples

In Cursor / Claude Code:

> "Scan localhost:3000 for accessibility issues"

> "Walk login → dashboard → checkout and report unique issues across the flow"

> "Suggest a fix for the contrast issue on `.btn-primary` on https://example.com — match their brand colors"

> "What does WCAG 1.4.11 check?"

Privacy, scan logs & telemetry

Every scan is logged locally to `~/.webability/scans/` — a one-line-per-scan `index.jsonl` ledger plus the full result of your last 500 scans. Browse them with the `scan_history` tool ("what did we scan earlier?") or plain `jq`. Set `WEBABILITY_SCAN_LOG=off` to disable, `WEBABILITY_SCAN_LOG_DIR` to relocate.

The server also reports one small telemetry event per tool call (every tool, not just scans) to the WebAbility API: tool name, a short target label (URL, selector, issue type — never page content), pass/fail, duration, issue counts, and a persistent anonymous install ID. Full scan results, HTML, and generated fix code never leave your machine via telemetry. Set `WEBABILITY_SCAN_TELEMETRY=off` to opt out.

Two tools — `generate_ai_fix` and `visual_audit` — additionally send page content (an HTML snippet or a screenshot) to WebAbility's API so it can call a third-party LLM on your behalf; WebAbility doesn't store that content, but the LLM provider sees it in transit. See PRIVACY.md for the full per-tool breakdown and WebAbility's privacy policy.

Learn more

WebAbility platform & docs

• WebAbility.io — the accessibility platform (widget, scanner, AI agents, dashboard)
• MCP server documentation · all docs
• Accessibility widget — one-line install, WCAG-compliant remediation for live sites
• Professional accessibility audit · managed accessibility
• Free WCAG & ADA accessibility checker — scan any URL in seconds
• Pricing · lifetime deal

Accessibility compliance guides

• WCAG 2.1 / 2.2 AA — Web Content Accessibility Guidelines
• ADA compliance — Americans with Disabilities Act
• Section 508 — U.S. federal accessibility requirements
• EAA — European Accessibility Act · AODA — Ontario (Canada)

Accessibility by industry

• Government · Education · Healthcare · Finance
• E-commerce / retail · Legal · Media · Non-profit

Install the widget on your stack

• WordPress · Shopify · Webflow · Squarespace · BigCommerce · HubSpot · any site (embed)

Package

• npm: `@webability/mcp` · Source: github.com/snayyar00/webability-mcp

Keywords: web accessibility, accessibility testing, WCAG 2.2 AA, ADA compliance, Section 508, EAA, AODA, a11y, accessibility scanner, color contrast checker, ARIA validation, alt text, keyboard navigation, screen reader, MCP server, accessibility for AI coding agents.

License

MIT © WebAbility.io