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AI & Machine Learning · Advanced

Agent2Agent Protocol (A2A)

An open protocol, introduced by Google and now under the Linux Foundation, for communication and task delegation between AI agents.

Definition

A2A lets agents built on different frameworks discover each other via Agent Cards, exchange messages and manage long-running tasks. It complements MCP: MCP connects agents to tools and data, A2A connects agents to other agents.

Exam tip

MCP = agent-to-tool; A2A = agent-to-agent.

Related terms