A protocol for agents to discover each other and hand work over, across vendors. Built by Google.
Others in protocols and tools
ComposioHundreds of tools, with auth already handled.
FastMCP
Model Context ProtocolThe standard that plugs any agent into any tool.
Playwright MCPCommon questions
Is Agent2Agent free to use?
Agent2Agent is open source and free to run yourself. You still pay whichever model provider you point it at, and this tutorial is free with no signup.
Do I need to know Python to use Agent2Agent?
Basic Python is enough. Functions, dictionaries and imports cover most of what Agent2Agent asks of you.
When should I not use Agent2Agent?
When something else in protocols and tools fits the job better. The others in that group are listed below.
Lessons for Agent2Agent are being written. Meanwhile the APIs for AI tutorial covers the same ground: state, tools, loops, memory and human approval. Most of it carries straight over.
Start the APIs for AI tutorial →