Agent2Agent (A2A) Protocol documentation

A2A is an open agent-to-agent interoperability protocol, originally developed by Google and donated to the Linux Foundation, with concepts for client agents acting on behalf of users, remote agent servers, agent cards, task lifecycles, modality negotiation, and secure opaque collaboration.

Citations

prediction

By 2027-06-30, a recognizable agent resource layer will exist in which user-facing orchestrator agents act as human-to-agent-to-agents interfaces and delegate work to specialized remote worker agents or harnesses through A2A, an A2A-compatible protocol, or a directly comparable agent-to-agent contract.

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