State of Web Vitals MCP

What your AI can do with it

• Look up Core Web Vitals metrics for a specific CMS, CDN, or framework
• Compare performance across different CMSs
• Compare performance across CDNs and frameworks
• Answer web performance questions using current metrics data
• Check metrics without needing an account or sign-in

Install State of Web Vitals MCP

The server’s own address, for the clients that take one directly. Or connect Ahel once and every client you use reads it from one address, with the account kept on Ahel rather than in each client’s config.

• Claude Code

  claude mcp add --transport http --scope user state-of-web-vitals-mcp 'https://www.corewebvitals.io/api/state-of-cwv/mcp'Copy

  Run it once in your project, then open /mcp to approve any sign-in the server asks for.

• Claude Desktop

  https://www.corewebvitals.io/api/state-of-cwv/mcpCopy

  Add a custom connector in Settings, paste this address, and approve the sign-in.

• Cursor

  cursor://anysphere.cursor-deeplink/mcp/install?name=state-of-web-vitals-mcp&config=eyJ1cmwiOiJodHRwczovL3d3dy5jb3Jld2Vidml0YWxzLmlvL2FwaS9zdGF0ZS1vZi1jd3YvbWNwIn0=Copy

  Open the link and Cursor adds the server at that address.

• ChatGPT

  https://www.corewebvitals.io/api/state-of-cwv/mcpCopy

  In Settings, enable Developer mode, create an MCP app, and paste this address. Your plan and workspace must allow custom apps.

• Codex

  codex mcp add state-of-web-vitals-mcp --url 'https://www.corewebvitals.io/api/state-of-cwv/mcp'Copy

  Run it once, then sign in with codex mcp login state-of-web-vitals-mcp if the server asks for an account.

From the project's README

As published by corewebvitals/state-of-cwv-mcp in README.md.

claude mcp add --transport http state-of-cwv https://www.corewebvitals.io/api/state-of-cwv/mcp

{
  "mcpServers": {
    "state-of-cwv": {
      "type": "http",
      "url": "https://www.corewebvitals.io/api/state-of-cwv/mcp"
    }
  }
}

curl -s -X POST https://www.corewebvitals.io/api/state-of-cwv/mcp \
  -H 'Content-Type: application/json' \
  -d '{"jsonrpc":"2.0","id":1,"method":"tools/call","params":{"name":"get_metrics","arguments":{"metrics":"lcp,good_all3","group_by":"cms","min_sites":100}}}'

npm install
npm start

docker build -t state-of-cwv-mcp .
docker run --rm -i state-of-cwv-mcp

Tools it offers (3)

What this server listed when Ahel dialed its public endpoint in Sep 2026, with no key and no account of yours. The names are the server’s own.

• get_metrics
• get_histogram
• list_options

Signals

Last commit

Jul 2026