AP2 Development Patterns

Before writing code

Fetch live docs:

1. Fetch https://ap2-protocol.org/specification/ for the latest protocol details
2. Fetch https://ap2-protocol.org/topics/ap2-and-ucp/ for UCP integration patterns
3. Fetch https://ap2-protocol.org/topics/ap2-and-x402/ for x402 crypto integration
4. Web-search site:github.com google-agentic-commerce AP2 samples for reference architectures

Conceptual Architecture

Multi-Agent Payment Architecture

The standard AP2 architecture involves four agents communicating via A2A: