How to install WebPerf Snippets in Claude Desktop

Measure Core Web Vitals and debug web performance with 56 snippets in a headless Chromium

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We found WebPerf Snippets in the official MCP registry. Our automated check passed on Nov 1, 2026 (it confirms the server is published and reachable), but no one at CuratedMCP has reviewed its code, permissions or credentials handling. Check what it can access before you give it keys. Scan your machine free to see every MCP server you have installed.

Steps

1Install Node.js 18 or newer (for npx)
2In Claude Desktop open Settings → Developer → Edit Config
3Add the entry below. If the file already has "mcpServers", add just the inner entry
4Quit and reopen Claude Desktop

Configuration

claude_desktop_config.json

{
  "mcpServers": {
    "webperf-snippets": {
      "command": "npx",
      "args": [
        "-y",
        "webperf-snippets"
      ]
    }
  }
}

Environment variable	Required	What it is
CRUX_API_KEYsecret	No	Chrome UX Report API key for the field data of get_crux; the other tools work without it

Install in other clients

Claude Code Cursor Windsurf Gemini CLI OpenAI Agents SDK

About WebPerf Snippets: repo, license and check results →

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