go

Go Samples for the Agent Payments Protocol AP2

This directory contains Go samples demonstrating how to build AP2 agents.

Available Scenarios

Currently, one scenario is available:

• Human-Present Card Payment
  • Complete card payment flow with Go agents and Python Shopping Agent

See the scenario README for detailed setup and usage instructions.

Why Go for Backend Agents?

Go can be exceptionally well-suited for building AP2 backend services:

• Type Safety: Compile-time validation of protocol structures
• Performance: Fast response times and low resource usage
• Concurrency: Efficient handling of concurrent requests
• Deployment: Single binary with no runtime dependencies

Project Structure

code/samples/go/
├── cmd/                               # Agent entry points
├── pkg/
│   ├── ap2/types/                    # AP2 protocol types
│   ├── common/                       # Shared infrastructure
│   └── roles/                        # Agent implementations
└── scenarios/                        # Runnable examples
    └── a2a/
        └── human-present/
            └── cards/                # Card payment scenario

Development

# Run tests
make test

# Format code
make fmt

# Build all agents
make build

License

Copyright 2025 Google LLC. Licensed under the Apache License, Version 2.0.