AI & models
A2A
Agent-to-Agent protocol · Agent2Agent
A2A (Agent-to-Agent) is an open standard that lets separate AI agents discover each other, talk, and split up work — even when they were built by different companies on different frameworks. If
MCP is how one agent reaches its tools, A2A is how two agents reach each other. Each agent publishes an Agent Card describing what it can do, and others hand it tasks through a shared, defined lifecycle. Why it matters
Part of Connecting Claude to your other tools → It's the plumbing behind 'a team of agents' instead of 'one agent with tools' — and because it's a cross-vendor standard, an agent you build can delegate to one you didn't.
see also