LupaRiel · ACP

English · rail hub · authorization / checkout · 87 entries · snapshot 2026-10-03 · reviewed 2026-10-03

ACP

Agentic Commerce Protocol (OpenAI, Stripe, Meta): checkout, cart, and delegated payment. Underpins Instant Checkout / Buy in ChatGPT.

What it is. Composable checkout, cart, and delegated-payment blocks for agents. Used by Instant Checkout / Buy in ChatGPT and Checkout for Facebook. Source: research/acp.md (87 rows, snapshot 2026-10-03, last reviewed 2026-10-03).

Who maintains it. Open standard maintained by OpenAI and Stripe (Meta collaborates). Spec lives at agenticcommerce.dev.

What it is not. A checkout/authorization protocol, not a per-API micropayment. Distinct from x402 and MPP.

Note. ACP research does not confirm Mercado Pago, Mercado Libre, or Tiendanube adoption. See LatAm.

Price, network, and status only when the table has them. Compare rails: x402 vs AP2 vs ACP vs MPP · PAP. Full directory (Spanish): /acp/.

Official docs

Methodology

How LupaRiel verifies entries
On rail hubs, the status is the one on that rail. On the home page and the Index, the most advanced among its rails.
Machine-readable catalog · /rieles.json
Spanish hub + full listing · /acp/

Sample entries

OpenAI · production · 2026-10-11
Stripe · production · 2026-10-03
Meta · production · 2026-10-03

These names come from the research tables (snapshot 2026-10-03). LupaRiel does not invent rows, prices, networks, or statuses. The complete listing stays on the Spanish hub.