Agentic commerce
ACP (Agentic Commerce Protocol)
ACP is a specification from OpenAI and Stripe defining how merchants expose product feeds and checkout sessions so an AI agent can complete a purchase.
The April 2026 revision covers checkout, payment delegation, cart, feed and authentication, plus an integration hook that lets ACP-aware agents advertise their checkout capability through MCP tool discovery.
Its scope narrowed during 2026: OpenAI shut down Instant Checkout and repositioned ACP toward product discovery and merchant-controlled experiences rather than in-chat purchase completion. Major retailers including Target, Sephora, Nordstrom, Best Buy and Wayfair adopted it on the discovery side.
In depth: What is ACP? A merchant guide