MCP Tools¶
| Tool | Upstream API | Purpose |
|---|---|---|
analyze_page |
PageSpeed Insights v5 | Analyze one URL |
analyze_pages |
PageSpeed Insights v5 | Analyze up to 10 URLs |
get_crux_data |
Chrome UX Report API | Current real-user measurements |
get_crux_history |
CrUX History API | Weekly real-user timeseries |
PSI versus CrUX¶
PSI combines a Lighthouse lab run with a reduced CrUX field-data section. The direct CrUX tools provide the broader metric catalog, form-factor controls, collection periods, and historical trends.
PSI strategies¶
| Value | Result |
|---|---|
mobile |
One mobile Lighthouse run |
desktop |
One desktop Lighthouse run |
both |
Mobile and desktop runs |
both is the default. Batch analysis uses at most four concurrent requests and
returns successful results alongside structured per-request errors.
PSI categories¶
The default categories are performance, SEO, accessibility, and best practices.
Use categories to request a subset or to opt into experimental
agentic-browsing.