Agent Payments Protocol (AP2)

This repository contains code samples and demos of the Agent Payments Protocol.

These samples use Agent Development Kit (ADK) and Gemini 2.5 Flash.

The Agent Payments Protocol doesn't require the use of either. While these were used in the samples, you're free to use any tools you prefer to build your agents.

The samples directory contains a collection of curated scenarios meant to demonstrate the key components of the Agent Payments Protocol.

The scenarios can be found in the samples/android/scenarios and samples/python/scenarios directories.

Each scenario contains:

• a README.md file describing the scenario and instructions for running it.
• a run.sh script to simplify the process of running the scenario locally.

This demonstration features various agents and servers, with most source code located in samples/python/src. Scenarios that use an Android app as the shopping assistant have their source code in samples/android.

• Python 3.10 or higher

Ensure you have obtained a Google API key from Google AI Studio. Then declare the GOOGLE_API_KEY variable in one of two ways.

1. Declare it as an environment variable:

   export GOOGLE_API_KEY=your_key

2. Put it into an .env file at the root of your repository.

   echo "GOOGLE_API_KEY=your_key" > .env

To run a specific scenario, follow the instructions in its README.md. It will generally follow this pattern:

1. Navigate to the root of the repository.

2. Run the run script to install dependencies & start the agents.

   bash samples/python/scenarios/your-scenario-name/run.sh

3. Navigate to the Shopping Agent URL and begin engaging.

The protocol's core objects are defined in the src/ap2/types directory. A PyPI package will be published at a later time. Until then, you can install the types package directly using this command: