State of Web Vitals MCP server

This is a free helper that connects your AI to a public dataset of website speed scores. The numbers come from real Chrome browsing data plus a large crawl of websites, grouped by things like which CMS or CDN a site uses. It is handy if you work on a website and want to compare platforms or check how common good scores are.

What this MCP server does

You ask your AI a question about website speed scores, like which CMS has the best pass rates. Your AI sends that request to this helper, which talks to the State of Web Vitals service. The service looks through its Chrome field data and crawl results, then sends back the numbers. Your AI turns those numbers into a short answer or a small table right in the chat. You can also ask for a distribution of one metric or for the list of available filters.

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What you can do with it

• Compare Core Web Vitals pass rates across CMS platforms
• Rank CDNs or frameworks by a chosen metric
• Get the distribution of one metric, like LCP, across many sites
• Filter results to only include platforms with a minimum number of sites
• Discover which filters, groupings and metric names are available
• Pull aggregate numbers to cite in a report or slide

Try asking your AI

• “Which CMS platforms have the best Core Web Vitals pass rates, only counting platforms with at least 100 sites?”
• “Show me the LCP distribution across sites that use WordPress.”
• “Rank CDNs by good_all3 percentage.”
• “What filters and metric names can I use with this data?”

What it gives back to you

You get back numbers: aggregate scores, pass rates, rankings, or distribution buckets, depending on what you asked. Your AI usually shows these as a short list or a small table in the chat. It can also explain what the numbers mean in a sentence or two. Nothing on your computer or your own website is changed.

Before you start

Who it's for

Web developers, SEO specialists, performance consultants and anyone comparing CMS, CDN or framework choices for a site.