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Protocol

Agent2Agent Protocol

Google's 2025 open protocol for discovery, communication, and collaboration across agents from different vendors or frameworks.

Era Generative AI for everyone

Release date

CapabilitiesAgents & tool use

ApplicationsEnterprise

Governance & standardsInteroperability

20252

  1. UpdateLinux Foundation takes over the A2A protocol

    The Linux Foundation announced the Agent2Agent project on 23 June 2025, taking stewardship of Google's open protocol for secure communication between autonomous AI agents and placing it under vendor-neutral governance.

  2. ReleaseGoogle announces the Agent2Agent protocol

    On 9 April 2025 Google announced Agent2Agent (A2A), an open protocol that lets AI agents from different vendors communicate, exchange information securely and coordinate work. In June 2025 the Linux Foundation said it would host the project.

Includes1

ACP (Agent Communication Protocol)

Works with1

Model Context Protocol

Works with3

Model Context ProtocolAgent Payments Protocol (AP2)AG-UI (Agent-User Interaction Protocol)

Sources

  1. Announcing the Agent2Agent Protocol (A2A)developers.googleblog.com · https://developers.googleblog.com/en/a2a-a-new-era-of-agent-interoperability/

Cite this page: Agent2Agent Protocol. TellWorld, https://www.tellworld.net/protocols/a2a. Updated 2026-11-07