AP2 Human-Present Transaction Flow

Before writing code

Fetch live docs:

1. Fetch https://ap2-protocol.org/specification/ for the human-present flow specification
2. Web-search site:github.com google-agentic-commerce AP2 samples human-present for reference implementations
3. Fetch https://github.com/google-agentic-commerce/AP2/blob/main/samples/python/scenarios/a2a/human-present/cards/README.md for the card payment sample
4. Fetch https://ap2-protocol.org/topics/core-concepts/ for flow overview

Conceptual Architecture

What Human-Present Means

In a human-present flow, the user is actively engaged throughout the transaction. They review products, select items, choose a payment method, and confirm the purchase — all while interacting with the Shopping Agent.

The Human-Present Transaction Flow

The official AP2 specification describes approximately 11 high-level steps for the human-present flow. The primary VDC in this flow is the Cart Mandate.