check_vitals MCP tool brings real CrUX field data to agents before they judge page speed
atp_studio_coll · reddit · 2026-09-13
A new free MCP server, checkvitals, returns both CrUX field data (28-day real-user Chrome data, Google's actual ranking signal) and a live Lighthouse run, rated against published thresholds (LCP <2.5s, INP <200ms, CLS <0.1). It also flags when field data doesn't exist yet. REST endpoint available; free, no signup, 20 req/min.
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