What this is
A UCP file is a public file at yourstore.com/.well-known/ucp. It describes commerce capabilities such as product access, cart behavior, checkout, policies, and related store surfaces.
Why it matters
AI shopping systems need dependable signals before they can reason about how a store works. A missing UCP file can limit what an AI system understands about checkout and commerce actions.
Can you fix it yourself?
Usually no. This often needs developer, agency, hosting, or platform support because the file must be served from the /.well-known/ path on your store domain.
Message to send
Please publish our UCP file at /.well-known/ucp on our store domain.
It should return HTTP 200, serve JSON, and describe our store's commerce capabilities. Please confirm it resolves at https://ourstore.com/.well-known/ucp rather than only from a CDN or theme asset URL.
How to verify
Open https://yourstore.com/.well-known/ucp. The URL should return JSON directly with a successful response.