An MCP server for LLMs to access web accessibility testing APIs using Deque Axe-core and Puppeteer.
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Tracked since2026
The Bottom Line
- Price
- Free, no paid tier. Compare plans
Key facts
- Provides LLMs access to web accessibility testing APIs.
- Uses Deque Axe-core and Puppeteer for WCAG compliance checks.
- Offers features like URL/HTML testing, color contrast, and ARIA validation.
Pros
- Accessibility testing automation
- MCP protocol integration
- WCAG compliance checking
- Developer workflow integration
- Improves web accessibility
Cons
- MCP protocol knowledge needed
- Setup and configuration required
- Not all issues detectable automatically
- Requires accessibility understanding
- Manual testing still needed
What is Web Accessibility Testing MCP?
Web Accessibility Testing MCP (A11y MCP) is a Model Context Protocol (MCP) server designed to provide Large Language Models (LLMs) with access to web accessibility testing capabilities. It leverages the Deque Axe-core API and Puppeteer to enable LLMs to analyze web content for WCAG compliance and identify accessibility issues. This tool is particularly useful for developers, QA engineers, and accessibility specialists who want to integrate automated accessibility checks into their LLM-powered workflows.
The server offers a range of features including testing public URLs and raw HTML snippets for accessibility, checking against various WCAG standards (2.0, 2.1, 2.2), and customizable tests for specific accessibility tags or rules. It also provides functionalities for rule exploration, color contrast analysis, ARIA validation, and orientation lock detection. By integrating with platforms like Claude Desktop, users can configure their LLMs to utilize these powerful accessibility testing tools, streamlining the process of identifying and addressing web accessibility concerns.
Available on: Web
Key Features
- Accessibility testing
- WCAG compliance
- MCP integration
- Automated scanning
- Issue reporting
- Remediation guidance
Pricing Plans
Pricing checked Sep 28, 2026
| Plan | Price | Details |
|---|---|---|
| Open Source | Free |
+1 moreShow less
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Is Web Accessibility Testing MCP worth the price?
Great value
This pricing is exceptionally generous, offering a fully functional 'Open Source' tier completely free.
There are no paid tiers, making it an outstanding value proposition. It's best for developers and organizations looking for a cost-effective, self-hosted web accessibility testing solution.
Reviews
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Web Accessibility Testing MCP FAQ
How does Web Accessibility Testing MCP help with WCAG compliance?
Web Accessibility Testing MCP allows LLMs to analyze web content against various WCAG standards, including versions 2.0, 2.1, and 2.2. It identifies accessibility issues by leveraging the Deque Axe-core API, helping to ensure web pages meet compliance requirements.
Which teams benefit most from Web Accessibility Testing MCP?
This tool is particularly useful for developers, QA engineers, and accessibility specialists. It helps these teams integrate automated accessibility checks directly into their LLM-powered workflows, streamlining the identification and resolution of web accessibility concerns.
How does Web Accessibility Testing MCP compare to Axe DevTools?
Web Accessibility Testing MCP integrates with the Deque Axe-core API to enable LLMs to perform accessibility testing, whereas Axe DevTools is a standalone product that also uses Axe-core. A11y MCP specifically focuses on providing an MCP server for LLMs to access these testing capabilities.
What kind of web content can Web Accessibility Testing MCP analyze?
Web Accessibility Testing MCP can analyze both public URLs and raw HTML snippets for accessibility issues. It provides functionalities like rule exploration, color contrast analysis, and ARIA validation across different content types.
What are the main limitations of using Web Accessibility Testing MCP?
A key limitation is that not all accessibility issues are detectable automatically, meaning manual testing is still required for comprehensive coverage. Users also need an understanding of the MCP protocol and accessibility principles for effective setup and use.
Does Web Accessibility Testing MCP include a free tier?
Yes, Web Accessibility Testing MCP is free to use, and no paid plan is required to access its features. This allows users to integrate automated accessibility checks into their LLM workflows without cost.
Can Web Accessibility Testing MCP be customized for specific accessibility rules?
Yes, Web Accessibility Testing MCP supports customizable tests for specific accessibility tags or rules. This allows users to focus on particular aspects of accessibility testing relevant to their project or compliance needs.
Source: github.com