WebPerf Snippets

io.github.nucliweb/webperf-snippets

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

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Connect this server

Add this to your MCP client config — claude_desktop_config.json (Claude Desktop) or .cursor/mcp.json (Cursor).Suits: Claude Desktop · Cursor.

{
  "mcpServers": {
    "webperf-snippets": {
      "command": "npx",
      "args": [
        "-y",
        "webperf-snippets@1.13.0"
      ],
      "env": {
        "CRUX_API_KEY": "<your CRUX_API_KEY>"
      }
    }
  }
}
Environment variables
  • CRUX_API_KEYsecretChrome UX Report API key for the field data of get_crux; the other tools work without it

A starting point — check the repository for exact arguments and setup. Restart your client after editing the config.

Category
Developer Tools
Version
1.13.0
Registry
active
Published
11/6/2026

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