Build a real-time chatbot API with Python, FastAPI, and SSE

This article provides a technical guide on building a real-time chatbot API using Python's FastAPI framework and Server-Sent Events (SSE). It explains why SSE is a suitable choice for streaming LLM responses due to its unidirectional nature and simplicity compared to WebSockets. The guide includes code examples for setting up the project, defining the SSE endpoint with FastAPI's StreamingResponse, and handling the streaming of tokens from an OpenAI-compatible LLM API. AI

IMPACT Enables developers to create more responsive chatbot interfaces by streaming LLM responses.

RANK_REASON Technical guide on implementing a specific software pattern.

Read on dev.to — LLM tag →

• FastAPI
• LLM
• OpenAI
• Python
• Server-Sent Events
• WebSockets

• product
• infra

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