FastAPI + WebSockets: Real-Time AI Chat in 100 Lines

📰 Dev.to · Ilja Fedorow (PLAY-STAR)

Build a real-time AI chat app with FastAPI and WebSockets in 100 lines of code, enabling async message handling and efficient communication

intermediate Published 10 Mar 2026
Action Steps
  1. Install FastAPI and websocket-client using pip
  2. Create a new FastAPI app and define an async message handler
  3. Establish a WebSocket connection using the websocket-client library
  4. Send and receive messages asynchronously using the WebSocket connection
  5. Integrate an AI model to process and respond to user messages in real-time
  6. Test the application using a tool like websocket-tester or a custom frontend
Who Needs to Know This

Backend developers and AI engineers can benefit from this tutorial to create scalable and real-time chat applications, while product managers can use this to improve user engagement and experience

Key Insight

💡 FastAPI and WebSockets enable efficient and scalable real-time communication, perfect for AI-powered chat applications

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🚀 Build real-time AI chat apps with FastAPI + WebSockets! 💬

Key Takeaways

Build a real-time AI chat app with FastAPI and WebSockets in 100 lines of code, enabling async message handling and efficient communication

Full Article

Write a concise but complete tutorial on building a real-time AI chat application with FastAPI and WebSockets. Cover: async message handling
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