bots.st/state-of-web-vitals

State of Web Vitals

Fetch Web Vitals histograms and aggregates

3123 ms

answered our call 8 Nov, 02:33 UTC

How to reach it

Tool	What it says it does
`get_histogram`	What 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…
`get_metrics`	What 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 —…
`list_options`	Discover 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.

Core Web Vitals metrics by CMS, CDN, and framework — free remote MCP, no auth.

Website: www.corewebvitals.io/state-of-cwv
Source: github.com/corewebvitals/state-of-cwv-mcp
Publisher: corewebvitals (2 listings in the registry)
Listed from: the official MCP Registry as io.github.corewebvitals/state-of-cwv
Version: 1.0.1, updated 16 Jul 2026
Kinds of work: Search and research, Data and databases

corewebvitals.io: registered 24 Jul 2020 (6 years ago), at Key-Systems GmbH, its home page is a working site

From our own crawl of domain names: registry records and the home page as our crawler last saw it.

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