# AP2 resources

### Official AP2 resources

- **AP2 repository** — https://github.com/google-agentic-commerce/AP2 — The open source AP2 project created by Google, with its samples and SDK. v0.2.0 is the latest tagged version; we validate against it.
- **AP2 specification (v0.2.0)** — https://github.com/google-agentic-commerce/AP2/blob/v0.2.0/docs/ap2/specification.md — The roles, the Checkout and Payment Mandates, mandate versioning, and its compatibility with UCP.
- **UCP AP2 Mandates Extension** — https://ucp.dev/2026-08-25/specification/payment/extensions/ap2-mandates — UCP's own specification of how AP2 is advertised and used within UCP: the primary source for most of the rows this checker runs.
- **AP2 FAQ (v0.2.0)** — https://github.com/google-agentic-commerce/AP2/blob/v0.2.0/docs/faq.md — Including how AP2 relates to UCP, and its description as similar to the A2A protocol.
- **Contributing guide** — https://github.com/google-agentic-commerce/AP2/blob/main/CONTRIBUTING.md — Notes that the core specification has been donated to FIDO and that contributions to this repo are now to the samples and SDK.

### Research & industry sources

- **commercetools – AI trends shaping agentic commerce** — https://commercetools.com/blog/ai-trends-shaping-agentic-commerce — 73% of consumers are already using AI in their shopping journey.
- **Accenture – Agentic commerce and the future of payments** — https://www.accenture.com/au-en/blogs/banking/agentic-commerce-payments — $3.1 trillion of online commerce will run through AI agents by 2030 – more than 30% of all online commerce – per Accenture.

### Validate other agentic protocols

- **UCP Check** — https://www.ucpcheck.org — Free validator for Universal Commerce Protocol.
- **ACP Check** — https://www.acpcheck.org — Free validator for Agentic Commerce Protocol.
- **ONX Check** — https://www.onxcheck.org — Free validator for Order Network eXchange.
- **MCP Check** — https://www.mcpcheck.org — Free validator for Model Context Protocol.
- **A2A Check** — https://www.a2acheck.org — Free validator for Agent2Agent Protocol.
- **ARD Check** — https://www.ardcheck.org — Free validator for Agentic Resource Discovery.

### Spec compliance the easy way

- **CorgiMaps** — https://www.corgimaps.com — Generate protocol-compliant endpoints in minutes and stay compliant as the specs change – no custom build and no changes to your fulfillment stack.