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Agentic Commerce Protocol (ACP)
ProtocolSpecification
Published specification
Open protocol from OpenAI and Stripe that lets businesses expose products and checkout to AI agents while remaining merchant of record. Not IBM's Agent Communication Protocol.
Protocol profile
- Connects
- AI commerce ↔ merchant
- Maturity
- Open protocol (OpenAI + Stripe)
- Distinction
- Merchant product feeds and agent checkout. Not IBM's Agent Communication Protocol (now part of A2A).
- Specification
- Primary source ↗
Documented relationships · 6
OpenAI says Instant Checkout uses ACP with merchant integrations. · Merchants may use their own checkout since March 2026
Evidence ↗PayPal documents Braintree delegated-payment token path for ChatGPT/ACP. · Current
Evidence ↗Microsoft documents Copilot Checkout adopting the Agentic Commerce Protocol (rolling out in the US).
Evidence ↗← Intelligent Commerce Connect accepts ACP (pilot)
Visa Intelligent CommerceDemonstrated / pilot
Documented preview
Visa Intelligent Commerce Connect (pilot) accepts ACP, UCP and MPP.
Evidence ↗Agentic Checkout Spec defines merchant implementation path under ACP. · Current
Evidence ↗OpenAI and Stripe co-developed the agentic checkout protocol. · Current
Evidence ↗