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Glossary · Agent2Agent (A2A) Protocol

Agent2Agent (A2A) Protocol

The Agent2Agent (A2A) protocol is an open standard, introduced by Google in 2025, that lets independent AI agents discover each other and collaborate across vendors and frameworks.

Where MCP connects an agent to tools and data, A2A connects agents to other agents, defining how they advertise skills and exchange tasks.

Together the two protocols form a common substrate for interoperable, multi-vendor agent systems.

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Related terms
Model Context Protocol (MCP)
The Model Context Protocol (MCP) is an open standard, introduced by Anthropic in 2024, that lets AI applications connect…
Agent Orchestration
Agent orchestration is the coordination of multiple AI agents and tools — routing tasks, sequencing steps, and managing …
Multi-agent Team
A multi-agent team is a group of specialized AI agents that coordinate to complete a workflow, each handling a sub-task …
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