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.

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