FastAPI is the best Python framework for building AI-powered APIs. Combined with Claude via ofox.ai, you can create production-ready AI endpoints in minutes. Here's the complete guide. Why FastAPI for AI APIs? Async native — Handle concurrent AI requests efficiently Automatic validation — Pydantic models validate inputs/outputs OpenAPI docs — Built-in interactive API documentation Type hints — Full IDE support and error checking Production-ready — Used by major companies worldwide Project Setup bash mkdir claude-api-service cd claude-api-service python3 -m venv venv source venv/bin/activate pip install fastapi uvicorn httpx pydantic Basic FastAPI + Claude Setup `python main.py from fastapi import FastAPI, HTTPException from pydantic import BaseModel from typing import List, Optional import httpx app = FastAPI(title="Claude API Service") class Message(BaseModel): role: str content: str class ChatRequest(BaseModel): model: str = "claude-3-5-sonnet-20241022" messages: List[Message] max_tokens: Optional[int] =…