OpenAI Agentic Commerce Protocol

The Agentic Commerce Protocol (ACP), codeveloped by OpenAI and Stripe, establishes the open standard for programmatic commerce flows between buyers, AI agents, and businesses. Released as open-source under Apache 2.0 license, ACP powers ChatGPT Instant Checkout, allowing U.S. users to buy from Etsy sellers and over 1 million Shopify merchants directly in chat. The protocol provides the common language that lets AI agents and businesses work together to complete purchases, with community-designed specifications enabling any agent to transact with any compatible payment provider. OpenAI has open-sourced the technology, allowing businesses to implement the specification without vendor lock-in, fundamentally changing commerce by embedding transactions into conversational AI.