Ucp Checker Agent Debugge

Detect UCP manifests on any store. See capabilities, payments, transports, and spec version — then test with the UCP Playground.

Full description:

See what any store supports — instantly.

UCP Checker detects Universal Commerce Protocol manifests on every storefront you visit. When a manifest is found, the popup shows exactly what the store declares: capabilities (checkout, fulfillment, discount, order), payment handlers (Google Pay, Shopify Card), transport protocols (MCP, Embedded, REST), and the spec version in use.

What you see in the popup:

- Domain status — green dot for UCP ready, grey for not detected
- Spec version and transport protocols
- Capability pills — which commerce features the store supports
- Payment handler pills — which payment methods are configured
- One-click links to View Status, Run Check, and Open Playground

Actions from the popup:

- View Status — open the full report on ucpchecker.com
- Run Check — trigger a fresh live validation
- Open Playground — launch a live AI agent session against the store on ucpplayground.com

Who it's for:

- E-commerce agencies: verify UCP compliance on client stores without opening DevTools
- AI platform teams: confirm MCP endpoints and capabilities before integration
- Growth & BD teams: identify agent-ready brands and share their public status report
- Developers: check spec version, transports, and capabilities while browsing

Privacy & permissions:

- Path-scoped host permissions — only fetches /.well-known/ucp manifest files
- No cookies, browsing history, or page content is read
- "Share anonymous uptime stats" toggle crowdsources public manifest data to keep the global directory current. Only public JSON is transmitted with credentials: "omit"
- All state stored locally in chrome.storage.local

Support: https://ucpchecker.com/contact