Agent-to-Agent Protocol (A2A)

What Is Agent To Agent Protocol?

Agent-to-Agent Protocol (A2A) is an open communication framework that allows autonomous AI agents to talk to each other in a standardized, predictable way​. In practice, each agent exposes an HTTP API (with endpoints like tasks or send) and a public agent card (metadata describing its capabilities) so that other agents can discover it and request its services​. A2A was released by Google and adopted by others including Arize to enable multi-agent collaboration on complex tasks (e.g. one agent can delegate a sub-task to another) without custom integrations​.