Definition

A2A (Agent-to-Agent Protocol)

Agent-to-Agent Protocol is Google's standard for agents in different organizations to discover and work with each other, the HTTP of the agent economy. Each agent publishes an Agent Card, a machine-readable description of what it can do, its endpoint, and the schemas it accepts and returns. Your Claude-based LangGraph agent can then transact with a partner's GPT-based CrewAI agent without either side knowing the other's stack.