Frequently Asked Questions about A11y MCP Server

Q: What is an MCP Server?

A: MCP (Model Context Protocol) is an open protocol that standardizes how applications provide context to LLMs. An MCP Server acts as a bridge, allowing AI models to access and interact with external data sources and tools.

Q: What is the A11y MCP Server?

A: The A11y MCP Server is specifically designed to give LLMs access to web accessibility testing APIs. It uses the Deque Axe-core API and Puppeteer to allow AI to analyze web content for WCAG compliance and identify accessibility issues.

Q: How does the A11y MCP Server help with web accessibility?

A: It allows automated testing of web pages and HTML snippets for accessibility issues, checks WCAG compliance, performs color contrast analysis, validates ARIA attributes, and detects orientation lock issues.

Q: What WCAG standards does the A11y MCP Server support?

A: The server supports various WCAG standards, including 2.0, 2.1, and 2.2.

Q: Can I customize the accessibility tests?

A: Yes, you can specify which accessibility tags and standards to test against, allowing you to focus on specific areas of concern.

Q: How do I install the A11y MCP Server?

A: The installation process involves configuring the server in the MCP settings for Claude Desktop. Detailed instructions are provided based on your operating system (macOS, Windows, or Linux).

Q: What are the available tools provided by the A11y MCP Server?

A: The server offers tools such as test_accessibility for testing URLs, test_html_string for testing HTML snippets, get_rules for exploring accessibility rules, check_color_contrast for color analysis, check_aria for ARIA validation, and check_orientation_lock for orientation lock detection.

Q: What is the response format of the server?

A: The server returns accessibility test results in a structured JSON format, including violations, passes, incomplete, and inapplicable results, along with details about the test environment and engine.

Q: What are the dependencies of the A11y MCP Server?

A: The server depends on packages such as @modelcontextprotocol/sdk, puppeteer, @axe-core/puppeteer, and axe-core.

Q: How does UBOS support AI Agent development?

A: UBOS is a full-stack AI Agent Development Platform that helps orchestrate AI Agents, connect them with enterprise data, build custom AI Agents with your LLM model, and create Multi-Agent Systems. The UBOS Asset Marketplace provides access to pre-built AI components and tools, like the A11y MCP Server, to accelerate development.