Signal
UCP profile and order-management readiness
Whether a store targeting Google/UCP surfaces publishes a public /.well-known/ucp profile and can return order status for the capabilities it declares.
Per-platform status
Where a platform documents relevant behavior, its status and source are shown. Undocumented platforms show "unknown" - honest unknowns, never invented.
| Platform | Status | Notes | Source |
|---|---|---|---|
| ChatGPT | Unknown | Not documented by this platform. | - |
| Gemini / Google AI Mode | Supported | UCP is the protocol Google's shopping/Gemini surfaces read; the profile at /.well-known/ucp must be publicly accessible without authentication. | Source (opens in new tab) · verified 2026-07-08 |
| Perplexity | Unknown | Not documented by this platform. | - |
| Copilot | Unknown | Not documented by this platform. | - |
| Claude | Unknown | Not documented by this platform. | - |
Evidence and sources
This signal is typed spec-fact (Very high confidence).
How to act on this
If you target Google/UCP surfaces, publish an unauthenticated /.well-known/ucp profile with real capabilities and signing keys, and back any declared order-management capability with a retrievable status endpoint.
Related checklist items
Handbook chapters