a2a-java and a2a-net
These are ecosystem siblings: parallel language-specific implementations of the same Agent2Agent protocol standard, allowing agents built in Java and .NET environments to communicate interoperably rather than compete or depend on each other.
About a2a-java
a2aproject/a2a-java
Official Java SDK for the Agent2Agent (A2A) Protocol
Provides reference server implementations supporting JSON-RPC 2.0, gRPC, and HTTP+JSON/REST transports, with a gRPC-first protocol specification generated from protobuf definitions. Enables Java developers to build agentic applications by implementing `AgentExecutor` and `AgentCard` interfaces with streaming support, task lifecycle management (submitted/working/completed/canceled states), and artifact emission for structured responses.
About a2a-net
neuroglia-io/a2a-net
.NET implementation of the Agent2Agent (A2A) protocol to enable secure, interoperable communication between autonomous agents across frameworks and vendors.
Built on JSON-RPC 2.0, the framework provides pluggable transports (HTTP, gRPC, JSON-RPC) for both clients and servers, enabling agents to discover and communicate with peers via agent cards and structured task orchestration. Task execution includes event streaming, state persistence (memory or Redis), and scheduling backends (in-memory or Quartz.NET) for distributed scenarios. The modular architecture separates core protocol definitions, client/server abstractions, and transport implementations into independent NuGet packages, allowing selective composition for different deployment contexts.
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