---
type: Article
name: "What is ACP?"
id: "https://selfe.ai/insights/glossary/what-is-acp"
url: "https://selfe.ai/insights/glossary/what-is-acp"
publisher: "did:web:selfe.ai"
description: "Agentic Commerce Protocol, an open checkout standard, associated with OpenAI and Stripe, for an AI agent to complete a purchase directly inside a conversation rather than sending the shopper off to a separate website."
datePublished: "2026-09-15T16:25:20.643Z"
author: The Selfe team
---

# What is ACP?

> Agentic Commerce Protocol, an open checkout standard, associated with OpenAI and Stripe, for an AI agent to complete a purchase directly inside a conversation rather than sending the shopper off to a separate website.

## In short

- ACP is an open checkout standard associated with OpenAI and Stripe, aimed at completing a purchase inside a conversation.
- Selfe tracks it as part of the wider landscape rather than building against it directly today.

Good for: Completing a purchase inside a conversation, OpenAI and Stripe's own path for that. Not good for: Assuming it's the only checkout standard that'll matter. Several are still competing for that ground.

It's aimed at roughly the same job UCP does, closing a purchase an agent has already worked out, but comes from a different origin and a different coalition of companies building it. Selfe tracks it as part of the wider protocol landscape rather than building against it directly today; which checkout protocols end up mattering most is one of the genuinely open questions in this space, not something settled yet.

## Good for

Completing a purchase inside a conversation, OpenAI and Stripe's own path for that.

## Not good for

Assuming it's the only checkout standard that'll matter. Several are still competing for that ground.

## Act on this

- [Check whether an agent can buy from you](https://selfe.ai/agentic-commerce/buyability-check) — the free readiness scan.
- [Discover venues](https://selfe.ai/api/registry/discover) — `POST`, semantic browse across the registry.
- [Match a bookable answer](https://selfe.ai/api/registry/match) — `POST` with dates and party size.
- [Verify Selfe's identity](https://selfe.ai/.well-known/did.json) — `did:web:selfe.ai`.
- [Agent card](https://selfe.ai/.well-known/agent-card.json) — how to connect over A2A or MCP.