langchain-ai/langgraph-101

Python

4 environment variables found in .env.example

Set these on your host before deploying. Each platform has an “Environment Variables” section in the deploy flow.

OPENAI_API_KEY secret If using OpenAI (comment out if using another model provider)
LANGSMITH_API_KEY secret Optional for LangSmith tracing and experiment tracking
LANGSMITH_TRACING
LANGSMITH_PROJECT

Best match Fly.io Anything Dockerized — requires the Fly CLI.

macOS

brew install flyctl && fly launch --from https://github.com/langchain-ai/langgraph-101

Linux

curl -L https://fly.io/install.sh | sh && fly launch --from https://github.com/langchain-ai/langgraph-101

Windows (PowerShell)

iwr https://fly.io/install.ps1 -useb | iex; fly launch --from https://github.com/langchain-ai/langgraph-101

Or deploy to a different host