Performance Engineer MCP

Full performance analysis: runs Lighthouse, PageSpeed Insights, header check, HTML audit, and CMS detection, then returns a prioritized list of Core Web Vitals improvements.

Run a Lighthouse audit against a URL for mobile or desktop and return scores, Core Web Vitals lab data, and improvement opportunities.

Fetch Core Web Vitals from Google PageSpeed Insights API (real-user CrUX field data when API key is set, Lighthouse lab data otherwise). Returns LCP, CLS, INP, FCP, TTFB.

Inspect HTTP response headers: compression (Brotli/gzip), caching, CDN detection, security headers, and HTTP/2 support.

Parse the HTML of a page and check for render-blocking resources, missing meta tags, script loading strategy, and head optimizations.

Fingerprint the CMS and hosting platform of a website (WordPress, Shopify, Next.js, Nuxt, Astro, etc.).

Scan all images on a page: detect oversized images, wrong formats (PNG/JPEG instead of AVIF/WebP), missing lazy loading, missing width/height attributes, and the LCP hero candidate that should be preloaded.

Use Playwright CSS coverage to find unused CSS, render-blocking stylesheets, and large framework bundles (Bootstrap, Tailwind). Reports per-stylesheet usage percentages and critical CSS opportunities.

Use Playwright JS coverage to find unused JavaScript, render-blocking scripts, large bundles, and third-party scripts (GA4, GTM, Facebook Pixel, Hotjar, etc.) with their impact on load time.

Check font loading strategy: Google Fonts preconnect, CSS @import anti-pattern, font-display values, WOFF2 format usage, and preload hints for self-hosted fonts.

Deep WordPress audit: detects 20+ plugins (Elementor, Divi, WooCommerce, WP Rocket, LiteSpeed Cache, NitroPack, Perfmatters, FlyingPress, Yoast, RankMath, and more) and generates plugin-specific recommendations with estimated LCP impact. Only useful on WordPress sites.

Detect Cloudflare and audit cache status, Brotli compression, HTTP/3, Early Hints, and Polish image optimization. Generates ready-to-use Cloudflare Cache Rules, Transform Rules, and setting recommendations.

Run a full performance analysis and return a human-readable Markdown report with Lighthouse scores, Core Web Vitals, platform detection, and prioritized recommendations. Use this when you need a shareable, narrative summary instead of raw JSON.

Run a full performance analysis and return a self-contained HTML dashboard with Lighthouse score cards, Core Web Vitals, an LCP-savings bar chart, and prioritized recommendations. Works for any site (WordPress, Shopify, Next.js, generic). Render the returned HTML as an Artifact for the user.

Run a full performance analysis and save a Word document (.docx) report to the user's Downloads folder. The document includes an executive summary, Lighthouse scores table, Core Web Vitals table, LCP savings table, and all prioritised recommendations with evidence and fixes. Works for any site. Retu…

Analyze a WordPress site and generate a recommended WP Rocket settings configuration. Accounts for detected page builders (Elementor, Divi), WooCommerce, cache conflicts, and third-party scripts. Returns a JSON settings object with rationale and warnings.

Generate ready-to-implement Cloudflare Cache Rules, Transform Rules, and recommended settings for a domain. Includes CMS-aware cache bypass rules (WordPress admin, WooCommerce cart, Shopify checkout), security header injection, and static asset caching.

Compare two analyze_website JSON reports (before and after a change) and return a delta report: Lighthouse score changes, Core Web Vitals improvements/regressions, newly introduced issues, and resolved issues. Pass the raw JSON output from two separate analyze_website calls.