Summary

Field data that arrives already rated.

It answers Core Web Vitals questions from real visitors rather than a lab run, and every figure comes back with its good, improve or poor rating and the filters that produced it — so the number arrives with the context needed to act on it.

What it is

A hosted query layer over CoreDash, a real user monitoring platform for Core Web Vitals. It answers from field data collected from real visitors, segmented by page template, country, device, browser, OS and a long list of other dimensions.

What you get

Current performance scores at p75, filtered and grouped by any dimension
A metric over time with an improving, stable or regressing summary attached
The distribution of a single metric across roughly 40 buckets, which is how a bimodal or long-tailed problem becomes visible
Rated buckets on every answer — good, improve, poor — matching the Core Web Vitals thresholds
Filters on device, country, page path, URL, browser, OS and the LCP, INP and CLS attribution element selectors

Requirements

A CoreDash account. Point your client at https://app.coredash.app/api/mcp and complete the browser OAuth sign-in, or send an API key as a bearer token for CI. Nothing installs. Data is stored in the EU, and paid plans are billed monthly.

Setup effort

One command — claude mcp add --transport http coredash https://app.coredash.app/api/mcp