urlB

MCP tool from Pagespeed Insights MCP by ruslanlap

(required): Second URL to compare

How to use it

urlB is exposed by the Pagespeed Insights MCP MCP server. Add the server to your MCP client (Claude Desktop, Cursor, Windsurf and others), and the urlB tool becomes available to the model automatically. See the full listing for setup details and every tool this server provides.

Install Pagespeed Insights MCP

$npx pagespeed-insights-mcp

FULL PAGESPEED INSIGHTS MCP LISTING

Other tools in Pagespeed Insights MCP (26)

analyze_page_speed

Full Lighthouse analysis — all metrics and audits

Analyze up to 10 URLs in parallel with progress tracking

array of categories to audit (default: ["performance", "accessibility", "best-practices", "seo"])

array of categories ["performance", "accessibility", "best-practices", "seo", "pwa"]

Clear internal cache to force fresh API requests

Side-by-side performance comparison between two URLs

Real-world Core Web Vitals from Chrome UX Report (field data)

"PHONE", "DESKTOP", or "TABLET" (default: "PHONE")

Unified report combining Lighthouse lab data with CrUX field data

get_element_analysis

LCP/CLS DOM elements causing performance issues

Complete Lighthouse audit for all categories

get_image_optimization_details

Images needing optimization with exact savings

get_javascript_analysis

JS bootup time, main-thread work, unused & duplicated modules

get_network_analysis

Network waterfall — all requests with timing and size

get_origin_crux

Domain-level (origin) Chrome UX Report field data across all pages

get_performance_map

Mermaid flowchart visualizing performance score, Core Web Vitals status, and top opportunities

get_performance_summary

Simplified key-metrics report

get_recommendations

Prioritized recommendations with actionable fixes

get_render_blocking_details

Render-blocking resources and critical request chains

get_third_party_impact

Third-party script impact grouped by provider

get_visual_analysis

Screenshots, filmstrip, and full-page captures

locale for results (default: "en")

"mobile" or "desktop" (default: "mobile")

(required): URL of the page to analyze

(required): First URL to compare

(required): Array of URLs to analyze (max 10)