Payments

Agentic Commerce Protocol (ACP)

Open spec from OpenAI and Stripe for agent-initiated checkout — product feeds, checkout endpoints, and scoped delegated payment tokens with the merchant staying merchant of record

• acp
• protocol
• checkout
• +4 more
• +3 more

Universal Commerce Protocol (UCP)

Open commerce standard from Google and Shopify for agentic shopping journeys across retailers, pairing with AP2 for the payment leg

• ucp
• protocol
• commerce
• +4 more
• +3 more

Visa Trusted Agent Protocol

Open framework using HTTP Message Signatures (RFC 9421) so merchants can recognize and trust a legitimate agent before it transacts

• tap
• agent-identity
• http-signatures
• +3 more
• +2 more