Agent Payments Protocol (AP2)

Open protocol using signed mandates so agents can transact within user-defined limits, with x402 and card rails

Interfaces

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Related services
Agentic Commerce Protocol (ACP) Open spec from OpenAI and Stripe for agent-initiated checkout — product feeds, checkout endpoints, and scoped delegated payment tokens with the merchant staying merchant of record	5/5
x402 Open HTTP 402 standard for per-request stablecoin payments, now at v2 and governed by the x402 Foundation	5/5
Stripe Issuing for Agents Issue virtual cards agents can spend on, with real-time authorization decisions, per-card spend controls, and full transaction visibility	5/5
Machine Payments Protocol (MPP) Open HTTP payment standard from Stripe and Tempo covering one-shot, recurring, and streaming agent payments across cards, stablecoins, and Lightning	5/5
Universal Commerce Protocol (UCP) Open commerce standard from Google and Shopify for agentic shopping journeys across retailers, pairing with AP2 for the payment leg	5/5
Stripe Agentic Commerce Suite Shared payment tokens, agentic network tokens, and ACP support so businesses can sell through AI agents	5/5