fastapi-mcp-langgraph-template

Why we included this project

Most LangGraph projects start as a notebook or a single script, and the gap between that and something you can actually run is where this template earns its keep. It pairs a FastAPI backend with MCP client support, so you can plug in community tool servers, and uses LangGraph to keep the agent's state straight. The operational layer is already wired in: SQLModel for persistence, Supabase with pgvector for storage, Langfuse for tracing, and an Nginx reverse proxy. Everything runs through Docker Compose with a devcontainer, so you can bring up the full stack locally and iterate before you worry about deployment. It is a scaffold, not a finished product, so expect to swap in your own MCP servers and agent logic, but the layout is a solid reference for how the pieces fit together.