Real-user Core Web Vitals from the Chrome UX Report (CrUX) API for any origin or URL.
Connect Runs on your machine
claude mcp add mcp-google-crux -e CRUX_API_KEY=<CRUX_API_KEY> -e CRUX_API_BASE=<CRUX_API_BASE> -e CRUX_TIMEOUT_MS=<CRUX_TIMEOUT_MS> -e CRUX_MAX_RETRIES=<CRUX_MAX_RETRIES> -- npx -y [email protected]{
"mcpServers": {
"mcp-google-crux": {
"command": "npx",
"args": [
"-y",
"[email protected]"
],
"env": {
"CRUX_API_KEY": "<CRUX_API_KEY>",
"CRUX_API_BASE": "<CRUX_API_BASE>",
"CRUX_TIMEOUT_MS": "<CRUX_TIMEOUT_MS>",
"CRUX_MAX_RETRIES": "<CRUX_MAX_RETRIES>"
}
}
}
}{
"mcpServers": {
"mcp-google-crux": {
"command": "npx",
"args": [
"-y",
"[email protected]"
],
"env": {
"CRUX_API_KEY": "<CRUX_API_KEY>",
"CRUX_API_BASE": "<CRUX_API_BASE>",
"CRUX_TIMEOUT_MS": "<CRUX_TIMEOUT_MS>",
"CRUX_MAX_RETRIES": "<CRUX_MAX_RETRIES>"
}
}
}
}{
"servers": {
"mcp-google-crux": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"[email protected]"
],
"env": {
"CRUX_API_KEY": "<CRUX_API_KEY>",
"CRUX_API_BASE": "<CRUX_API_BASE>",
"CRUX_TIMEOUT_MS": "<CRUX_TIMEOUT_MS>",
"CRUX_MAX_RETRIES": "<CRUX_MAX_RETRIES>"
}
}
}
}Replace the values in angle brackets with your own. Keys stay on your machine; we never see them.
Tools
This server runs locally, so its tools are listed by your MCP client once it starts.
Environment variables
| Name | Description |
|---|---|
CRUX_API_KEYRequired, secret | Google Cloud API key with the Chrome UX Report API enabled (sent as the key= query parameter). Treat it as a secret. |
CRUX_API_BASEOptional | API root host override. |
CRUX_TIMEOUT_MSOptional | Per-request timeout in milliseconds. |
CRUX_MAX_RETRIESOptional | Retries on transient errors (429, 5xx, network). |
Details
| Package | [email protected] (NPM, stdio) |
| First published | 31 Oct 2026 |
| Last updated | 31 Oct 2026 |
| Registry name | io.github.A1-x-Tech/mcp-google-crux |
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