---
term: "Agent Payments Protocol (AP2)"
category: "Agent protocols"
url: https://agenticopenfinance.com/glossary/agent-payments-protocol
source: AgenticOpenFinance glossary
---

# Agent Payments Protocol (AP2)

> An open protocol for agent payments built on signed mandates, available as an extension to A2A.

The Agent Payments Protocol is an open protocol, first published by Google under the Apache License, for agent-led payments between users, agents, merchants and payment providers. It anchors trust in verifiable digital credentials called mandates, in open and closed forms, which are chained into an audit trail for both human-present and human-not-present transactions. It is available as an extension to Agent2Agent, and its documentation states that standardisation continues within working groups of the FIDO Alliance.

Related terms: [Mandate](https://agenticopenfinance.com/glossary/mandate.md), [Open mandate](https://agenticopenfinance.com/glossary/open-mandate.md), [Closed mandate](https://agenticopenfinance.com/glossary/closed-mandate.md), [Checkout Mandate](https://agenticopenfinance.com/glossary/checkout-mandate.md), [Payment Mandate](https://agenticopenfinance.com/glossary/payment-mandate.md)