Agent Payments Protocol (AP2)
Open protocol from Google for secure agent-led payments across traditional and crypto rails, with a crypto-native x402 extension built with Coinbase, Ethereum Foundation, and MetaMask.
Last release Apr 28, 2026 · Last commit Apr 24, 2026 · ★ 2,937
Overview
AP2 (Agent Payments Protocol) is an open protocol announced by Google for initiating and settling agent-led payments, using cryptographically signed Verifiable Credential 'Mandates' to create verifiable, user-authorized transaction trails. It is an extension to the Agent2Agent (A2A) protocol and supports both traditional rails and crypto/stablecoins. The crypto-native path is the A2A x402 extension, developed by Google in collaboration with Coinbase, the Ethereum Foundation, and MetaMask.
Sato Score
72/100· HighHow open, active & verifiable — not a safety or returns grade.
- Maintenance & liveness
- 20/35
- Code transparency
- 20/20
- Interface verifiability
- 0/10
- Docs & demo
- 10/10
- Listing transparency & provenance
- 14/15
- Independent verification
- 8/10
Independently verified — listing reviewed against evidence, never self-reported.
Observed record — 57 daily checks since 2026-07-14
- Succeeded
- 57
- Failed
- 0
- Their error
- 0
- Unattributed
- 0
This is the share of our daily checks that succeeded — not an availability guarantee. A check can fail because the host was down, because our runner timed out, or because the network in between dropped it, and only the first of those is a fact about this project. Failures are split by what we can attribute; anything we cannot attribute is counted, not hidden. 49 of these checks predate 2026-09-01, when the probe counted a bot-block (HTTP 403) as a failure and recorded no reason for any failure. Rates spanning that date mix two definitions. Since then: 100%.
Details
- Chains
- Ethereum, Base, Multichain
- Agent types
- Payment Protocol, Commerce Agent
- Open source
- Yes
- Pricing
- Free (open protocol)
- Deploys as
- pip, Self-hostedfrom project docs · 2026-06-25
- Works with
- A2A, MCP, ADK, x402, Universal Commerce Protocolfrom project docs · 2026-06-25
- Last checked
- 2026-09-08
Marketplace Signals
- ▸ Demo available
Verification status reflects evidence reviewed by Sato Hub. Self-reported claims are never presented as verified.
Where Agent Payments Protocol (AP2) fits
Related concepts: How Agents Interact With Smart Contracts, How Agents Use Wallets, What Are Onchain Agents?
Recent Activity
All news →Releases and posts from Agent Payments Protocol (AP2), pulled from its GitHub and X.
AP2 v0.2.0
This is the second release of AP2. It focuses on providing Human Not Present flows.
AP2 v0.1.0
0.1.0 (2025-09-16) Features Create Agent Payments Protocol (AP2) ( e66fc0b )
Listing History
Recorded changes to Agent Payments Protocol (AP2)'s listing — status, verification, Sato Score, and recent releases. Full history is kept in the listing record.
- Jun 25, 2026Enriched: deployment options, has demo, marketplace notes
- Jun 25, 2026Auto-enriched: tags, supported integrations, creator name, creator profile url
- Jun 16, 2026Edited: deploy spec
- Jun 11, 2026Sato Hub began tracking this listing
Compared with
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Sato Hub. "Agent Payments Protocol (AP2) — Sato Hub." Sato Hub, updated 2026-09-08, accessed 2026-09-08. https://satohub.ai/resources/agent-payments-protocol-ap2This page is refreshed daily. Citations include the date so a reader can tell which snapshot a claim came from.
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