Audience
Developers and platform architects building AI-driven commerce experiences who need a protocol for secure, interoperable agent-initiated purchasing and payment flows
About Universal Commerce Protocol (UCP)
The UCP and AP2 documentation describes how the Universal Commerce Protocol (UCP) integrates with the Agent Payments Protocol (AP2) to support secure, verifiable transactions initiated by AI agents or platforms on behalf of users, making it possible for commerce systems to handle discovery, checkout, and payment without intermediaries. UCP is fully compatible with AP2, which acts as the trust layer for agent-led transactions by requiring a secure, cryptographically verifiable exchange of intent and authorization between platforms and businesses using Verifiable Digital Credentials (VDCs); this ensures businesses receive signed checkout commitments that can’t be altered mid-flow and platforms issue proofs of payment authorization tied specifically to a cart state, reducing fraud and making transactions final and authentic.
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Universal Commerce Protocol (UCP)
United States
ucp.dev/documentation/ucp-and-ap2/
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