Google CrUX MCP

Overview

Google CrUX MCP is a Model Context Protocol (MCP) server: Real-user Core Web Vitals from the Chrome UX Report (CrUX) API for any origin or URL. In practice that means any MCP-compatible AI assistant can call Google CrUX MCP's tools directly — the model decides when to use them in a conversation or agent run.

It runs locally: the npm package mcp-google-crux speaks MCP over stdio on your machine. Configuration happens through environment variables — you'll need CRUX_API_KEY. The current release is v1.1.0, published under the MIT license, with source at A1-x-Tech/mcp-google-crux on GitHub.

Google CrUX MCP is listed under Development on mcp.site and works with any MCP client — Claude Desktop, Claude Code, Cursor, VS Code, Windsurf, Zed and the rest of the ecosystem — using the install snippets below. If you maintain Google CrUX MCP for A1-x-Tech, claim this listing to verify ownership, earn the Verified badge, and keep the details current.

Installation

// claude_desktop_config.json
{
  "mcpServers": {
    "google_crux_mcp": {
      "command": "npx",
      "args": [
        "-y",
        "mcp-google-crux"
      ],
      "env": {
        "CRUX_API_KEY": "<crux-api-key>"
      }
    }
  }
}

Requires CRUX_API_KEY