Agent2Agent Protocol

active agents

Open protocol for AI-agent interoperability — discovery, capabilities, messaging across agent runtimes.

Sponsor: Google
Year: 2025
Tags: agents,interop,discovery
Spec: https://a2a-protocol.org

Related agents protocols

A2X (Agent to Anything)

A2X Community · draft

Cisco / LangChain / Galileo · active

NEAR AI · draft

Agent Communication Protocol

IBM Research · active

Agent Network Protocol

ANP Community · active

Agora Foundation · draft

ERC-8004 (Trustless Agents)

Ethereum / Crossmint · draft

Ericsson + ECMA TC56 · draft

Open Agent Schema Framework

AGNTCY · active