A2A Protocol Support in AG2 v0.10
AG2 v0.10 introduces native support for the Agent2Agent (A2A) Protocol, enabling agents to communicate across different processes, frameworks, and languages through a standardized interface.
This article walks through implementing A2A in AG2, with a focus on practical patterns for building distributed agent systems.
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What is A2A?
A2A is a JSON-RPC 2.0 protocol over HTTP(S) for agent-to-agent communication. It provides a framework-agnostic interface that allows agents built with different tools (AG2, LangGraph, CrewAI, Semantic Kernel, Pydantic AI, etc.) to communicate without custom integration code.
The protocol handles: - Task delegation and execution - Bidirectional communication between agents - Authentication and security - Observability and monitoring
When to use A2A:
Use A2A when you need to connect agents across: - Different processes or machines - Different teams or organizations - Different programming languages or frameworks - Services that require formal contracts between components
Don't use A2A for simple in-process agent communication—standard AG2 patterns are more efficient for that.
Note: AG2's A2A implementation uses the official A2A Python SDK. Check their documentation for protocol-level details.