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Strongly typed Python A2A library with Pydantic v2, dataclasses, and robust serialization support.

Full-stack A2A framework — Python backend + Node.js frontend included, multi-agent coordination with host agent, MCP tools via JSON config, RAG and DeepSearch agents ready to deploy.

Minimal Python A2A implementation covering client and server basics, task lifecycle, streaming, and push updates.

979 stars — the most complete Python A2A framework: workflow engine, AI router, Agent Flow UI drag-and-drop, native LangChain, MCP v2.0 with GitHub/Browserbase/Filesystem providers, full CLI.