Performance score
Runs Google PageSpeed Insights on mobile and grades the composite Core Web Vitals number alongside our proprietary TTFB classifier.
Lighthouse+ AI Bridge Checker
Runs Google PageSpeed Insights (Performance, Accessibility, Best Practices, SEO) and layers proprietary audits on top: font self-hosting, SRI, llms.txt readiness, and TTFB classification. Grades on the mobile performance score.
Instant audit. No account required.
What the Lighthouse+ AI Bridge audit checks
Three checks, one verdict. Each tile is a primitive your AI agent can read alongside the full JSON payload.
Accessibility
Re-uses Lighthouse's accessibility audits - contrast, label coverage, landmark structure - so the page works for the screen-reader minority too.
SEO & best practices
Layers the Lighthouse SEO and Best Practices verticals on top, plus our font self-hosting and llms.txt readiness checks.
Lighthouse+: AI-Native Performance Optimization
Standard performance audits tell you what is slow. Lighthouse+ tells your AI Agent how to fix it.
Lighthouse+ is an enriched diagnostic engine that supplements standard Google Lighthouse audits with proprietary infrastructure signals and security health checks, designed specifically for machine reasoning and automated remediation.
Why Lighthouse+?
Traditional performance tools are designed for human interpretation. They produce reports that sit in inboxes. Lighthouse+ produces Remediation Manifests that trigger action. Integrate these manifests with our Self-Healing MCP Protocol to automate the entire recovery process.
1. Enriched Infrastructure DNA
We go deeper than "lab data." Lighthouse+ layers proprietary audits on top of the standard Lighthouse categories (Performance, Accessibility, Best Practices, SEO):
- TTFB Classification: Detects high TTFB (>300ms) and heuristically classifies the bottleneck as network latency vs. origin processing using CrUX field data.
- Font Self-Hosting: Automated detection of Google Fonts cross-origin handshakes with a
gain_msprojection for self-hosting. - Subresource Integrity (SRI): Flags external scripts missing
integrity=attributes - a common CDN-based XSS vector. - CSP Hardening: Surfaces weak or missing Content-Security-Policy directives from the underlying Lighthouse audit.
- HSTS Enforcement: Confirms
Strict-Transport-Securityis present on HTTPS origins.
For compression (Gzip/Brotli) audits, pair this with our dedicated Compression Checker.
2. AI-Ready Reasoning Schema
The output of Lighthouse+ is a flattened, machine-readable JSON schema optimized for LLMs (Claude, Gemini, GPT).
- Impact Projections: Every finding includes a "ms saved" projection to help your AI Agent prioritize fixes.
- Contextual Prompts: We inject the exact technical context needed for an AI to generate a valid pull request.
3. Verification Loop (Shadow API)
Stop guessing if a performance fix worked. With our Shadow API, you can verify AI-generated changes in a production-like environment before they ever reach your users.
4. Direct Feed into the Active Incident Pipeline
Every Lighthouse+ run is one of the structured signals the AI Diagnostic Checker consumes when a continuous monitor degrades. When health flips to red, the latest Lighthouse+ snapshot is bundled with the failing checker output and shipped into the Active Incident panel - your AI agent receives performance opportunities ranked by potentialSavingsMs alongside the root cause, with no extra query needed.
Strategic SEO Benefits
Lighthouse+ isn't just about speed; it's about Generative Engine Optimization (GEO).
- AI Crawlability: We probe your root for
llms.txtandllms-full.txtand emit a dedicated audit entry recommending adoption if either is missing. - Structured Data Signals: The underlying Lighthouse SEO category flags missing structured data, invalid meta descriptions, and document-outline issues that directly impact AI and search visibility.
Get Started with Lighthouse+
Lighthouse+ is a PRO feature available to all UpMonitor subscribers.
Ready to bridge the execution gap?
Also useful for this stack
Pair the audit you just ran with these checkers - the failure modes tend to travel together.
Performance
Measures Time to First Byte (TTFB), total response time, and body size. Grades TTFB as success (≤500ms), warning (≤1000ms), or failure (>1000ms).
Page Weight
Measures the size of the initial HTML document and counts declared <script>, <link rel=stylesheet>, <img>, and <iframe> tags. Warns above 500 KB; fails above 2 MB.
Security Headers
Checks for seven key security headers: HSTS, CSP, X-Frame-Options, X-Content-Type-Options, Referrer-Policy, Permissions-Policy, and Cross-Origin-Opener-Policy. Also performs a deep-dive on HSTS quality.
Stop running this audit by hand.
Schedule Lighthouse+ AI Bridge every minute from 12 regions. Get an AI-drafted remediation prompt the moment a check fails - delivered to your inbox, Slack, or MCP-connected agent.