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langchain-ai/fullstack-chat-server

github.com/langchain-ai/fullstack-chat-server ↗

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Node.js API
7 environment variables found in .env.example

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

  • TAVILY_API_KEY secret
  • LANGCHAIN_PROJECT To separate your traces from other application
  • LANGCHAIN_API_KEY secret
  • SUPABASE_URL
  • ANTHROPIC_API_KEY secret LLM choice:
  • OPENAI_API_KEY secret
  • FIREWORKS_API_KEY secret Optional
Best match Deploy on Railway Apps that need Postgres, Redis, or background workers.
Alternative Fly.io Anything Dockerized — requires the Fly CLI.
macOS 
brew install flyctl && fly launch --from https://github.com/langchain-ai/fullstack-chat-server
Linux 
curl -L https://fly.io/install.sh | sh && fly launch --from https://github.com/langchain-ai/fullstack-chat-server
Windows (PowerShell) 
iwr https://fly.io/install.ps1 -useb | iex; fly launch --from https://github.com/langchain-ai/fullstack-chat-server
Or deploy to a different host
Render Full-stack with managed Postgres + Redis. DigitalOcean App Platform Containers, droplets, and managed services.
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