# A2A

An open standard, created by Google and now run by the Linux Foundation, that lets agents from different vendors communicate and work together.

The A2A Protocol project (Linux Foundation) says: “The Agent2Agent (A2A) Protocol is an open standard for seamless communication and collaboration between AI agents.”

Also called: Agent2Agent, Agent-to-agent protocol

The other half: Model Context Protocol

Source: https://redfinchadvisory.com/lexicon/a2a (version 1.0, changed 2026-10-21)