io.github.A1-x-Tech/mcp-google-crux

Google CrUX MCP

Is the Google CrUX MCP server down? No. It answered initialize and tools/list in the probe of 2026-11-01.

Real-user Core Web Vitals from the Chrome UX Report (CrUX) API for any origin or URL.

alive probed 2026-11-15 · unchanged since 2026-11-01

6tools

4.9ktokens in Claude Opus 5.5

2.5 %of Claude's 200k window

2.0×the median server

331 msto initialize

91 msto list tools

Run it: npx -y mcp-google-crux@1.2.1 (stdio, probed in a container with the network off)
Host: npmjs.com
Reports itself as: mcp-google-crux 1.2.1
Capabilities: tools
Instructions: 1 091 characters
Of a 1M window: 0.5 % of a 1M context window
Count: 4.9k tokens in Claude Opus 5.5, exact, measured 2026-10-17. With the Claude Code prefix mcp__…__ on each tool name: 5.0k. The o200k_base estimate is 2.9k. Counted again when the tool definitions change. Method.
Repository: https://github.com/A1-x-Tech/mcp-google-crux
Website: https://github.com/A1-x-Tech/mcp-google-crux#readme
Registry: active, updated 2026-10-31 · registry entry

Most expensive tools

The Claude column scales the o200k estimate of each tool by this server's ratio of exact to estimate, 1.70×.

Tool	≈ Claude tokens	o200k estimate	Share of this server
query_history_record	942	554	19 %
query_record	927	545	19 %
get_cwv_trend	923	543	19 %
compare_form_factors	779	458	16 %
compare_origin_vs_url	685	403	14 %

Other registry entries on npmjs.com, the ones next to this name; all of them.

Servers that mention google.

The result of the latest probe, the tool count and the token cost. The feed has an entry for every probe that changed them.

Stops answering, comes back, tool set or cost changes. One confirmation mail first, a stop link in every mail.