How do I install the mcp web a11y mcp server?

Use a recorded configuration for your client, replace example credential values and paths, and verify the documented runtime. Restart or reconnect the client, then inspect the available tools.

What credentials does it need?

It reads `MCP_OUTPUT_DIR` from the environment. Store these in your client's env block or a secrets manager — never commit them to a repository — and grant the narrowest scope that still covers your use case.

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MCP Web A11y MCP Server

MCP server for web accessibility analysis using axe-core

Local serverstdioTypeScript

What is the MCP Web A11y MCP Server?

MCP server for web accessibility analysis using axe-core

What you get

An MCP (Model Context Protocol) server that provides web accessibility analysis capabilities using axe-core and Puppeteer.

Analyze web accessibility of any URL using axe-core
Simulate color blindness (protanopia, deuteranopia, tritanopia) using color matrices
Detailed reporting of accessibility violations
Support for custom user agents and selectors
Debug logging for troubleshooting
Comprehensive accessibility checks based on WCAG guidelines

Configuration and credentials

Node.js (v14 or higher) - npm

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Compare MCP servers by category, or browse hosted MCP servers if you prefer an endpoint over a local process.

Maintainer setup documentation.

How to install the MCP Web A11y MCP Server

{
  "mcpServers": {
    "web-a11y": {
      "command": "node",
      "args": [
        "/path/to/mcp-web-a11y/build/index.js"
      ],
      "disabled": false,
      "autoApprove": [],
      "env": {
        "MCP_OUTPUT_DIR": "/path/to/output/directory"
      }
    }
  }
}

From the project documentation. Replace placeholders and example paths before connecting.

Configuration

Node.js (v14 or higher) - npm

Variable	Description	Required
MCP_OUTPUT_DIR	Declared in the maintainer’s client configuration.	Check documentation

Example prompts to try

“Use MCP Web A11y to Parameters.”
“Use MCP Web A11y to Building.”
“Use MCP Web A11y to Debugging.”

Frequently asked questions

MCP server for web accessibility analysis using axe-core Confirm the tools offered by your installed version in the connected client. Tool availability and permissions depend on the server and account configuration.

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