A2A Python SDK
Official Python SDK for building A2A clients and servers with streaming, tasks, and agent cards.
Pricing
Free
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What it does
Long-form description, mapped skills, and a concrete usage example.
The official Python SDK is the reference implementation for Python teams building A2A-compatible clients and servers. It is the clearest starting point for implementing task lifecycle handling, streaming, agent cards, and protocol-compliant request flows.
Build A2A servers
Expose agent cards, task execution, and streaming endpoints from Python services.
Build A2A clients
Call remote A2A agents with protocol-compliant message and task flows.
Technical
Framework
Custom
Language
Python
Spec version
1.0-alpha
Interaction
Text, Forms/Structured Data, Files, Streaming
Supported input
Supported output
Requirements
API keys
None
Infra
Python 3.11+
Estimated run cost
Free local dependency; runtime cost depends on the model or tools you wire in.
External services
None
How to install
Clone or access the repository at https://github.com/a2aproject/a2a-python.
Checkout the branch or tag `main`.
Prepare the required runtime: Python 3.11+.
Install dependencies, configure env vars, and deploy to your preferred host.
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