analyze_page

Analyze one absolute HTTP or HTTPS URL.

Parameters

Parameter	Type	Required	Default
url	string	Yes	-
strategy	string	No	both
categories	string[]	No	performance, SEO, accessibility, best practices
locale	string	No	PSI default

Valid strategies are mobile, desktop, and both.

Valid categories are:

• performance
• seo
• accessibility
• best-practices
• agentic-browsing (experimental)

Response

The response contains results and errors. Every successful result has:

• metadata: input strategy, PSI timestamp, Lighthouse version, redirects, warnings, and runtime errors.
• fieldData: page and origin CrUX measurements. Missing data remains absent; page-to-origin fallback is explicit.
• labData: open category map, lab metrics, Lighthouse 13 insights, diagnostics, audit details, metric savings, and entity classifications.

Field metrics use the upstream p75 rating and preserve histogram distributions. Lab metrics retain their Lighthouse score and unit instead of receiving field-data ratings.

Examples

Analyze https://www.devleader.ca on mobile. Compare real-user LCP, CLS, and INP
with the Lighthouse lab metrics and prioritize the current insights.

Run the experimental agentic-browsing category for https://www.devleader.ca
and summarize its WebMCP and llms.txt findings.