Agent Payments Protocol (AP2)
EcosystemVerifiedGoogle's secure payment authorization protocol for AI agents, providing cryptographic consent for UCP transactions.
The Agent Payments Protocol (AP2) is a secure payment protocol developed in the Google agentic commerce ecosystem. AP2 mandates provide cryptographic proof of user authorization when an AI agent initiates a purchase, ensuring that payment processors and merchants can verify the intent and scope of agent-initiated transactions. AP2 works alongside UCP: UCP handles the commerce flow, while AP2 secures the payment authorization chain.
Why This Matters for UCP
AP2 provides the secure payment authorization layer for UCP transactions, enabling merchants and payment processors to cryptographically verify that an AI agent is acting within its authorized scope.
UCP Capabilities
UCP Endpoint
Ecosystem — Endpoint not yet publicly available
Integration Example
// AP2 secures UCP payment authorization:
// 1. User grants agent purchase authorization via AP2 mandate
// 2. Agent includes AP2 proof in UCP checkout session
// 3. Merchant verifies AP2 proof before fulfilling order
// This creates a tamper-resistant authorization chain.Category
Related ProtocolsUCP Status
EcosystemTags
Pricing
free
Reviews
★★★★★4.7 (3 reviews)These are illustrative examples to show what reviews will look like. Submit your own experience below.
J. Santos
Senior Engineer · Feb 28, 2026
Integration was straightforward. The UCP endpoint discovery works as documented and checkout completes in under 2 seconds.
M. Lee
Backend Developer · Mar 3, 2026
Works well for our use case. The documentation is accurate and the implementation matches what the spec describes.
R. Kapoor
Platform Engineer · Jan 15, 2026
Integrated in an afternoon. Solid implementation with no unexpected edge cases in production.
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