# A2A resources

### Official A2A resources

- **A2A official site** — https://a2a-protocol.org — The official A2A site: what the protocol is, how agents discover and collaborate, and the published specification, currently A2A 1.0 (we validate against the 1.0.1 release).
- **A2A GitHub repo** — https://github.com/a2aproject/A2A — The open-source A2A project under the Linux Foundation, contributed by Google: the specification, SDKs, and samples, licensed Apache 2.0.

### 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.
- **ARD Check** — https://www.ardcheck.org — Free validator for Agentic Resource Discovery.
- **AP2 Check** — https://www.ap2check.org — Free validator for Agent Payments Protocol.

### 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.