The primary launch of the SDK covers most key options of the protocol: dealing with agent functionality discovery, direct messaging, task-based interactions, and dealing with streaming information. It helps fast interactions, lengthy workflows, and real-time operations. On the distant agent aspect, you should use ASP.NET Core so as to add A2A assist to present brokers.
The .NET A2A SDK is being developed within the open on GitHub and is distributed by way of NuGet. It’s licensed utilizing the Apache 2.0 license, so it needs to be appropriate with most enterprise open supply insurance policies. It’s essential to do not forget that this can be a preview, and each the SDK and the A2A protocol are more likely to change. For one factor, the A2A protocol was solely launched at first of April 2025.
Constructing your first A2A interface
Getting began with the preview is simple sufficient. All you want is a current .NET launch (Model 8.0 or later) and your alternative of .NET growth atmosphere. You possibly can then create a fundamental agent, putting in the A2A and A2A ASP.NET Core packages from NuGet by way of the .NET CLI. Pattern code ought to make it easier to get began; there’s assist for purchasers and servers, in addition to Semantic Kernel.
