Pagespeed Field Metrics
pagespeed_field_metricsRead-onlyIdempotent
Real-user Core Web Vitals for a page AND for its whole origin in one call, from Google's Chrome UX Report as PageSpeed Insights serves it — 75th-percentile Largest Contentful Paint, Interaction to Next Paint, Cumulative Layout Shift and Time to First Byte, with the good/needs-improvement/poor split behind each and Google's own pass/fail verdict. AUTHORITATIVE for whether a page passes Core Web Vitals, and it says plainly when a low-traffic page has no data of its own and Google substituted the origin's — a substitution that otherwise reads as page data and misattributes the whole site's performance to one URL.
Input Schema
TableJSON Schema
| Name | Required | Description | Default |
|---|---|---|---|
| url | Yes | Full page URL, including the scheme, e.g. https://www.example.com/pricing. | |
| strategy | No | Device class for the field data: mobile (the default) or desktop. |