a2aproject/a2a-samples is the official sample repository for the Agent2Agent (A2A) protocol. It shows, in working code across several languages, the standard by which AI agents (AI programs that receive requests and perform tasks) communicate in the same way even when they are built on different frameworks. The repository was created on May 27, 2025, and no public releases are confirmed.
Each agent has its own message format, so they are not easy to plug into one another as they are. A2A is a specification that standardizes the shape of requests and responses, letting each agent keep its own implementation while lining up with its counterpart. This repository shows how that specification is implemented across the Python, Go, C#, Java, and Node.js stacks, and also includes instructions for launching the Helloworld agent. The license is Apache-2.0, the star count is 1807, and the primary language shown is Jupyter Notebook.
That said, the README describes this repository as a demonstration in itself while stressing that data sent by external agents must be validated and handled safely. So rather than being pulled straight into a real service, it is better regarded as material for comparing how the standard is implemented in each language. The momentum score is 2.5 out of 10, and there is no data for the freshness, technology, or quality scores, so performance or adoption status is difficult to judge at this point.