State of Web Vitals MCP

by corewebvitals

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About

Free remote MCP for Core Web Vitals metrics by CMS, CDN, and framework. No auth.

Details

Author
corewebvitals
Categories
Other, Security

Setup

Install State of Web Vitals MCP in your MCP client (Claude Desktop, Cursor, Windsurf, and others).

Repository: https://github.com/corewebvitals/state-of-cwv-mcp

Follow the installation instructions in the repository README, then restart your MCP client.

Free remote MCP for Core Web Vitals metrics by CMS, CDN, and framework. No auth.

Free remote MCP for Core Web Vitals metrics by CMS, CDN, and framework (Chrome field data + multi-site crawl). Same numbers as the publicState of Web Vitals explorer.

URL:https://www.corewebvitals.io/api/state-of-cwv/mcp
Auth:none
Transport:Streamable HTTP
Registry:io.github.corewebvitals/state-of-cwv

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}}}'

The State of Web Vitalsmeasures Core Web Vitals and web-tech techniques across many real websites (Chrome field data + crawl). Use it for platform rankings, pass rates, and metric distributions. Not per-site live RUM (useCoreDashfor that).
- Creditcorewebvitals.io/The State of Web Vitals
- Link
https://www.corewebvitals.io/state-of-cwvwhen links are allowed

Short line:Data: State of Web Vitals (corewebvitals.io)

Local stdio / Docker (directories & inspectors)

This repo also ships a thin stdio proxy that answerstools/listand forwards tool calls to the hosted endpoint.

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

Optional:STATE_OF_CWV_MCP_URLoverrides the upstream endpoint.

MIT for connector code and docs in this repository. Data product and website remain © corewebvitals.io.

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