Agentic Commerce Protocol (ACP)
An open standard, maintained by OpenAI and Stripe, that connects buyers, their AI agents and merchants so a purchase can complete inside a conversation.
- term
- Agentic Commerce Protocol (ACP)
- category
- commerce
- short_def
- An open standard, maintained by OpenAI and Stripe, that connects buyers, their AI agents and merchants so a purchase can complete inside a conversation.
- long_def
- ACP defines an interaction model for in-conversation checkout — the standard behind ChatGPT's Instant Checkout. Maintained jointly by OpenAI and Stripe as Founding Maintainers under the Apache 2.0 license, it uses date-based (YYYY-MM-DD) versioning, with OpenAI and Stripe providing the first reference implementations.
- see_also
agentic-commercex402ap2- etymology_origin
- Introduced alongside ChatGPT Instant Checkout (29 September 2025); the specification is maintained by OpenAI and Stripe as Founding Maintainers under Apache 2.0, with date-based (YYYY-MM-DD) versioning.
- related_to
agentic-commercex402ap2agent-as-buyer- contrast_with
- Unlike AP2, a payment-authorization protocol, ACP is the broader checkout interaction model between an agent and a merchant — it governs how the purchase happens in-conversation, and can settle through underlying payment rails.
- example
- OpenAI and Stripe launched the Agentic Commerce Protocol with ChatGPT Instant Checkout on 29 September 2025, going live with Etsy on launch day.
- source
- https://github.com/agentic-commerce-protocol/agentic-commerce-protocol
- status
- emerging
- why_it_matters
- ACP is how a merchant exposes its catalog and checkout to ChatGPT and other agents directly; speaking it is the path to selling inside an AI conversation.
- sameAs
- —
- bridge_entity
- protocols/payments/acp
- last_verified
- 2026-06-15
- md_twin
- /glossary/acp.md