AI Research Atlas

Agent2Agent (A2A) protocol

Google · 9 April 2025

Open Agent2Agent protocol so agents from different vendors and frameworks can discover and talk to each other; 50+ launch partners.

Positioned as complementary to Anthropic's Model Context Protocol, since MCP gives an agent tools and context while A2A lets agents collaborate with each other. Launched with enterprise authentication on par with OpenAPI schemes and an open-source repository.

Date
Wednesday, 9 April 2025
Lab
Google
Kind
infra
Access
open weights

Open-source protocol, not model weights. Launched from Google Cloud; production-ready version promised later in 2025.

Sources

  1. developers.googleblog.com/en/a2a-a-new-era-of-agent-interoperability/

This record was checked against its sources on 6 October 2026. How we check