A Python library for running agentic applications as A2A Servers, following the Agent2Agent (A2A) Protocol.

• A2A Protocol Compliant: Build agentic applications that adhere to the Agent2Agent (A2A) Protocol.
• Extensible: Easily add support for different communication protocols and database backends.
• Asynchronous: Built on modern async Python for high performance.
• Optional Integrations: Includes optional support for:
  • HTTP servers (FastAPI, Starlette)
  • gRPC
  • OpenTelemetry for tracing
  • SQL databases (PostgreSQL, MySQL, SQLite)

• Python 3.10+
• uv (recommended) or pip

Install the core SDK and any desired extras using your preferred package manager.

1. Run Remote Agent

   git clone https://github.com/a2aproject/a2a-samples.git
   cd a2a-samples/samples/python/agents/helloworld
   uv run .

2. In another terminal, run the client

   cd a2a-samples/samples/python/agents/helloworld
   uv run test_client.py

3. You can validate your agent using the agent inspector. Follow the instructions at the a2a-inspector repo.

You can find a variety of more detailed examples in the a2a-samples repository:

• Python Examples
• JavaScript Examples

Contributions are welcome! Please see the CONTRIBUTING.md file for guidelines on how to get involved.

This project is licensed under the Apache 2.0 License. See the LICENSE file for more details.