/.well-known/ucp

Definition

The path where a business publishes its UCP profile listing services, capabilities and payment handlers.

Example

allbirds.com returned JSON at /.well-known/ucp on 4 Nov 2026. ucp.dev, read 4 Nov 2026.

Where it appears in the sourced facts

• Businesses publish their UCP profile at /.well-known/ucp; platforms send their own profile URI per request in the UCP-Agent header. ucp.dev, read 4 Nov 2026. In Universal Commerce Protocol (UCP).
• In the shared crawl of 4 Nov 2026, Shopify stores such as allbirds.com and gymshark.com answer /.well-known/ucp with JSON; homedepot.com, barnesandnoble.com, wyzecam.com and bitdefender.com answered /.well-known/ucp.json with a ucp object. ucp.dev, read 4 Nov 2026. In Universal Commerce Protocol (UCP).
• UCP: the business publishes a profile at /.well-known/ucp; the platform sends its own profile URI in the UCP-Agent header; capabilities are negotiated and a payment handler is chosen from the payment_handlers registry. ucp.dev, read 4 Nov 2026. In How an agent checkout actually flows, per protocol.
• On 4 Nov 2026 allbirds.com and gymshark.com returned JSON at /.well-known/ucp. ucp.dev, read 4 Nov 2026. In How to support UCP on Shopify.

Nearby terms

• Instant Checkout
• Buy for Me
• Agent profile
• All terms