Agent Payments Protocol (AP2)
Open protocol for agent-initiated payments, built as an extension to A2A and MCP, with signed user mandates.
Reference by Created by Google
Chalk Labs
Need help deploying Agent Payments Protocol (AP2)?
Chalk Labs sets up agents like this inside real teams: connected to your tools, tested on your data, with a human in the loop where it matters.
About
Use cases: payments-billing, identity-access
Reviews
Write a reviewNo reviews yet. Installed it? Reviews come from verified installers only. How reviews work
About the protocol
- Specification
- ap2-protocol.org/
- Current version
- v0.2blog.google
- Maintainer
- Created by Googlecloud.google.com
- Governance
- Donated to the FIDO Alliance (April 2026)blog.google
- Launched
- 2025-09cloud.google.com
- Developed with more than 60 organizations, including Mastercard, American Express, PayPal, Coinbase and Adyen. cloud.google.com
Listings that use it
No listing declares it yet.
Signals
- Stars
- 3,246
- Forks
- 518
- Open issues
- 88
- Last commit
- Apr 29, 2026 (6 months ago)
- Last release
- Apr 28, 2026 (6 months ago)
From GitHub (fetched Oct 24, 2026).
Details
- Version
- v0.2
- License
- Apache-2.0
- Repository
- github.com/google-agentic-commerce/AP2
- Website
- ap2-protocol.org/
- First seen
- Oct 24, 2026
- Last checked
- Oct 24, 2026
Done for you
Rather not set it up yourself?
Chalk Labs scopes, builds and runs agents for your team: the task audit, the eval harness, the integrations and the weekly ops report. Fixed scope, priced before we start.
See how we build AI agents →Read the case studies
Chalk Labs is a two-founder AI and growth studio. We build AI agents, CRMs and MVPs for Web3 and AI companies, and have shipped 50+ product and token launches.
- launches shipped
- 50+
- launches shipped
- media placements
- 500+
- media placements
- founders on every account
- 2
- founders on every account
Press we've placed: Forbes · CoinDesk · Decrypt · Cointelegraph · The Block
Rahil Jain, Co-founder, Chalk Labs. Ex-Goldman Sachs engineer. You talk to the person who builds it.
Get Agent Payments Protocol (AP2) running in your business
Tell us what you want to automate. A founder replies within one working day with a plan, not a pitch deck.
Cite this page
Agent Payments Protocol (AP2). Agent Mart. https://agentmart.dev/reference/agent-payments-protocol (last updated 2026-10-24)