In this video, I’ll walk you through how I use LangChain and OpenAI models to automatically generate engaging content and hashtags for my social media app — featuring our star raccoon 🦝.

You’ll learn how to:

✅ Set up a LangChain microservice using FastAPI

✅ Use LangSmith to trace and debug AI calls

✅ Format prompts with Pydantic for structured output

✅ Run everything neatly in Docker containers

✅ Test your API in Postman and see the results instantly

It’s a fun, practical walkthrough showing how to connect all the dots — from frontend to GPT-4o response — with just the right amount of chaos.