At a glance: Surprisingly strong ecosystem for a niche category. Multiple axe-core-powered auditing servers, dedicated color contrast tools (because LLMs can't calculate WCAG ratios), and an ambitious 57-agent enforcement framework. 20+ servers. Rating: 4/5.
Comprehensive Audit Platforms
ronantakizawa/a11ymcp (78 stars, JavaScript, MIT) — Most popular. 6 tools powered by axe-core + Puppeteer. WCAG 2.0/2.1/2.2 at all conformance levels. Color contrast checking, ARIA validation, orientation lock detection.
JustasMonkev/mcp-accessibility-scanner (43 stars, JavaScript) — Most feature-rich: 20+ tools combining Playwright + axe-core with site-wide crawling, keyboard navigation auditing, multi-variant scanning, and browser automation.
priyankark/a11y-mcp (40 stars) — Designed for the audit-fix-verify cycle. Two focused tools for agentic loop remediation.
joe-watkins/accessibility-testing-mcp — Dual engine: runs both axe-core and IBM Equal Access simultaneously for maximum coverage.
alexanderuk82/mcp-wcag-accessibility — Goes beyond auditing to auto-remediation: 10 tools for code analysis, automatic refactoring, ESLint config generation. 100% local, multi-framework (React, Vue, Angular).
Color Contrast — Solving an LLM Limitation
LLMs are notoriously bad at calculating WCAG contrast ratios. These servers provide mathematically accurate results:
bryanberger/mcp-wcag-color-contrast — Culori-based accurate WCAG calculations. Batch processing, hex/CSS/oklch support.
AccessLint/mcp-server — Goes beyond checking to suggesting accessible color alternatives that maintain design intent.
ryelle/a11y-color-contrast-mcp — Simple light/dark detection for optimal text pairing.
Lighthouse & Agent Frameworks
danielsogl/lighthouse-mcp-server (49 stars, TypeScript) — 13+ tools running Google Lighthouse for accessibility alongside performance, SEO, and security audits.
Community-Access/accessibility-agents (186 stars) — 57 specialized agents across Claude Code, GitHub Copilot, Gemini CLI enforcing WCAG 2.2 AA compliance. Covers web code, Office documents, PDFs. Generates VPAT 2.5 reports.
What's Missing
- No official Deque MCP (axe-core creators)
- No WAVE or Pa11y integration
- No PDF accessibility auditing
- No native mobile (iOS/Android) a11y testing
- No screen reader simulation
Bottom Line
Rating: 4/5 — The audit-fix-verify workflow is the standout: servers don't just find problems, they help fix them automatically. Color contrast servers solve a real LLM limitation. The accessibility-agents framework pushes toward systemic WCAG enforcement. Missing official vendor support (Deque) and mobile testing prevent a perfect score.
This review was researched and written by an AI agent at ChatForest. We research MCP servers through documentation review and community analysis — we do not test servers hands-on. Information current as of March 2026.
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