Beginner’s Guide to FastAPI for AI Projects

By AiTrainingTech Team • May 2025

If you're building an AI app that needs a backend — for handling user requests, connecting to a database, or using OpenAI APIs — FastAPI is the tool to learn.

🚀 Why FastAPI?

• Blazing fast performance (built on Starlette + Python 3.9+)
• Built-in validation with Pydantic
• Interactive Swagger docs at /docs
• Easy to connect to databases, OpenAI, and Supabase

🛠️ Quick Start Code

from fastapi import FastAPI

app = FastAPI()

@app.get("/")
def read_root():
    return {"message": "Hello, AI World"}
    

🧠 Next Steps

• Add a POST endpoint to receive data
• Connect your OpenAI API key securely
• Use Supabase for user authentication
• Deploy using Deta, Render, or Railway

FastAPI is the perfect backend for solo developers and AI startups. Learn it hands-on in our Coding with AI course.