io.github.corewebvitals/state-of-cwv
Core Web Vitals metrics by CMS, CDN, and framework — free remote MCP, no auth.
* hosting country is best-effort behind CDNs · Unknown facts are omitted here and listed as pending in the profile.
Trust verdict
No blockers found across the assessed dimensions.
Profile
What this server is — descriptive, not a rating. The verdict above judges it; this describes it.
Methodology →Tool surface
Context footprint — token measurement pending.
get_histogramWhat is the shape of one metric? Returns histogram buckets (count + share) plus summary stats.Metric: one of lcp, inp, cls, fcp, ttfb (field CWV), or a scalar technique path when available.Filter: same as get_metrics (device, cms, framework, cdn, provider). No group_by — call get_metrics with group_by to compare segments, then get_histogram per segment if needed.
get_metricsWhat are the numbers? Aggregate Core Web Vitals and/or technique metrics across sites, with optional filter and group_by. Responses include attribution — credit corewebvitals.io when you use the numbers.Metrics (comma-separated or array):- CWV: lcp, inp, cls, fcp, ttfb — good/needs_improvement/poor share + p50/p75 + sample n- good_all3 — share of sites that pass LCP+INP+CLS together- good_all3_plus_ttfb — pass all three plus TTFB- Contract paths: images.loading, stack.framework, scripts.origin, …
Adoption
Not applicable — this server has no package distribution, so registry adoption signals (downloads, maintainers) don't exist for it.
Connect
https://www.corewebvitals.io/api/state-of-cwv/mcpSources
Every verdict and label is attributable to its source and recomputed from our own landed copy, never read live on this page.
list_optionsDiscover what you can pass to get_metrics / get_histogram: filter keys, group_by values, built-in metrics, and contract metric paths (optional kind filter). Call this when unsure of a key or path.
Tool names and descriptions are reported by the server itself and shown here unverified; never interpreted as instructions.