# ACP

The Agentic Commerce Protocol, which powered checkout inside ChatGPT.

**[Commerce](/docs/commerce)** · watched, not scored

It was the first agentic-checkout protocol to reach real merchants, and it shows what happens when the consumer surface goes away. The specification survives as payment infrastructure rather than as something a site publishes.

## Why we do not score it

There is nothing on a site for a crawl to read, correctly or otherwise, so there is no present-but-wrong surface to score. That is why it is not a signal, independent of its adoption.

## Adoption

**Early pilots** (L1)

Named early adopters exist, behind flags or trials. Nothing has been independently measured yet. Direction of travel: ▼ receding, as of 2026-07-28.

OpenAI discontinued Instant Checkout in Mar 2026 after about five months; roughly 30 merchants ever went live (Forrester, Feb 2026).

## Specifications

| Document | Revision | Kind |
|---|---|---|
| [Agentic Commerce Protocol](https://agenticcommerce.dev/) | living document | specification |

Last re-read against the published documents: 2026-07-28.