UCP Checker Chrome Extension
EcosystemVerifiedBrowser extension that detects UCP manifests on any website and surfaces agent-readiness signals in real time.
The UCP Checker Chrome Extension (available in the Chrome Web Store) passively monitors every website you visit for UCP manifest presence. It detects /.well-known/ucp endpoints, surfaces UCP readiness signals in the browser toolbar, and feeds anonymous uptime data back to the UCPChecker.com monitoring pool. This makes it easy for developers and merchants to quickly verify UCP implementation status during browsing.
Why This Matters for UCP
The UCP Checker Chrome Extension provides passive real-time UCP detection and monitoring for any website, contributing anonymous data to the broader UCP ecosystem health tracker.
UCP Capabilities
UCP Endpoint
Ecosystem — Endpoint not yet publicly available
Integration Example
// Install from Chrome Web Store, then browse any merchant site.
// The extension automatically detects UCP manifests and shows
// agent-readiness signals in the browser toolbar.Category
ValidatorsUCP Status
EcosystemTags
Pricing
free
Reviews
★★★★★4.7 (3 reviews)These are illustrative examples to show what reviews will look like. Submit your own experience below.
L. Hansen
Developer · Jan 20, 2026
Ran this against 12 different UCP endpoints as a benchmarking exercise. Results were consistent and matched manual inspection.
W. Anderson
QA Engineer · Feb 16, 2026
This is what we run in CI on every deploy. Catches schema drift early. False positive rate is basically zero in our experience.
G. Patel
Platform Engineer · Mar 6, 2026
Accurate validator. The error output is clear enough to act on without reading the spec every time. Does what it says.
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