Platform & products
Agentic Commerce Protocol
ACP
Definition
The open standard OpenAI co-developed with Stripe that powered Instant Checkout. It defines product feeds, checkout sessions and delegated payment tokens. Since March 24, 2026, OpenAI has extended it to product discovery, and it's licensed under Apache 2.0 for any business or AI platform to implement.
Defined in Instant Checkout Is Gone: How Buying Inside ChatGPT Works Now.
How else it gets framed
The same term carries different emphasis depending on the surface it’s used on. Both readings are correct.
An open standard, developed by OpenAI and Stripe and licensed under Apache 2.0, for how AI agents and businesses exchange product data, checkout sessions and payment tokens. OpenAI says merchants start an ACP integration by sharing a product feed.
The OpenAI Product Feed Spec, Field by Field, With Shopify Mappings →OpenAI's specification for sharing product feeds with ChatGPT and, for merchants with checkout enabled, running a checkout session in ChatGPT's interface while payment and order state stay on the merchant's systems. OpenAI's docs say OpenAI is not the merchant of record under ACP.
AI Shopping Channels: How Products Get Into ChatGPT, Copilot, Gemini and Perplexity →Where Agentic Commerce Protocol comes up
The guides that put this term to work, rather than just defining it.
Can AI channels list your products?
Every product in your public feed against Shopify Catalog's rules, plus robots.txt, policies and product data. About 20 seconds.