commerce · Google + Shopify + partners

Universal Commerce Protocol

Merchant capability profile at /.well-known/ucp. Necessary for Google/Shopify agent shopping — not sufficient for machine payment or tool use.

Public paths Vokko probes

• /.well-known/ucp

Spec / docs: https://ucp.dev

Other protocols: acp · ap2 · tap · mcp · a2a · x402 · mpp · llms · ai-plugin · openapi