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Code

All source code for AP2 lives here, split by artifact.

sdk/ — the AP2 SDK

The primary artifact of this repository. The Python implementation is at sdk/python/ap2/ and is the package exposed by the root pyproject.toml (installed as import ap2).

It contains:

  • sdk/python/ap2/models/ — Pydantic models for carts, mandates, receipts, and payment requests.
  • sdk/python/ap2/schemas/ — canonical JSON Schemas and the generator used to emit the Python models in sdk/python/ap2/sdk/generated/.
  • sdk/python/ap2/sdk/ — the runtime SDK: mandate wrappers, chain verification, SD-JWT helpers, constraints, disclosure metadata.
  • sdk/python/ap2/tests/ — unit tests for the SDK.

Future language SDKs (Go, JS, …) would live as siblings under sdk/.

samples/ — reference implementations

End-to-end scenarios that demonstrate the protocol:

  • samples/python/ — Python roles (merchant, credentials provider, shopping agent, payment processor) and scenarios.
  • samples/go/ — Go reference servers and scenarios.
  • samples/android/ — Android shopping assistant and the digital payment credentials scenario.
  • samples/certs/ — test CA and leaf certificates used by the samples for SD-JWT trust verification.

web-client/ — demo UI

A Vite + React + TypeScript app that exercises the A2A protocol against the sample agents.