What is A2A (Agent-to-Agent Protocol)?
Understand Google's Agent-to-Agent protocol, how agents communicate with each other, and the emerging standards for agent interoperability.
MCP solved a critical problem: how an AI agent talks to tools. But there's another problem that's just as important: how do AI agents talk to each other?
Picture a software company with three AI agents. One handles customer support, one manages the codebase, and one monitors production systems. A customer reports a bug. The support agent needs to tell the code agent to investigate, and the code agent might need to ask the monitoring agent for recent error logs. Right now, there's no standard way for these agents to communicate.
A2A (Agent-to-Agent) is Google's open protocol for agent interoperability. It defines how agents discover each other, describe their capabilities, communicate, and collaborate — regardless of which framework or model powers them.
MCP vs A2A — Diff
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