Source checked · Build

Agent2Agent (A2A) Protocol

Agent2Agent (A2A) is an open protocol enabling communication and interoperability between opaque agentic applications.

Best for: Teams designing communication between two agent applications and selecting an official SDK for their implementation language.

Limitations: A ready-made Codex connector or communication with untrusted agent endpoints before identity, authentication, and authorization are designed.

Public use

24,783 GitHub stars · 2,507 forks

Activity

Release v1.0.1 on 28 May 2026 · repository updated 14 Jul 2026

Community

173 open issues · Discussions available

Checked

14 Jul 2026

Source facts only. Not tested or recommended by Agent Blocks.