A2A
Agent2Agent Protocol
Judgement: Situational
Agent-to-agent protocol; right when you have multi-agent orchestration, otherwise overkill.
Open protocol for AI agents to discover, communicate, and collaborate with each other across vendors and frameworks. Where MCP is agent-to-tools, A2A is agent-to-agent: capability discovery, task delegation, and multi-turn dialogue between independently developed agents.
Created by Google and donated to the Linux Foundation. Increasingly paired with MCP in production stacks: A2A for agent-to-agent orchestration, MCP for the tools and data each agent reaches into.
At a glance
- Category
- AI Interfaces
- Governance
- Linux Foundation (created by Google; multi-vendor steering)
- Status
- Active; donated to LF in 2025
- First released
- 2025
Links
Related standards
Other standards in AI Interfaces.
- MCP — Model Context Protocol
See A2A in context
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