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Legion A2A
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Strongly typed Python A2A library with Pydantic v2, dataclasses, and robust serialization support.
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Python
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2.9K
Freepythonpydantic
Ecosystem
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a2a-net
Modular .NET A2A SDK — Core, Client, Server, HTTP + gRPC + JSON-RPC, Redis persistence, Quartz scheduling: assemble only what you need.
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C#
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2.9K
Freedotnetcsharp
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a2a4j
Full Java A2A stack - separate Spring Boot client/server starters, BOM, Reactor SSE streaming, spec-faithful A2A 1.0 support, and Maven Central distribution.
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Spring Boot
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Java
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Freejavaspring-boot
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Agentic
Rust MCP client/server crate in active development — ergonomic agentic building blocks, JSON-RPC via rpc-router, multi-AI via genai, A2A on roadmap.
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Rust
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2.5K
Freerustmcp