Set up ESLint MCP in Claude Code

Run ESLint diagnostics, fix linting issues, and inspect ESLint configuration directly from your AI editor using the official ESLint MCP server.

Locate the config file

Claude Code reads MCP server configuration from the following file:

~/.claude.json

Create this file if it does not already exist.

You can configure ESLint MCP using the CLI command or by editing the config file directly.

Option A: CLI command

bash

claude mcp add eslint-mcp -- npx -y @eslint/mcp

Option B: Config file

json

{
  "mcpServers": {
    "eslint-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@eslint/mcp"
      ]
    }
  }
}

No environment variables needed. ESLint MCP works out of the box without any API keys or tokens.

Restart Claude Code. ESLint MCP should appear in your MCP server list with 4 tools available.

This server adds approximately 2,060 tokens to your context window for tool definitions.