This code showcases integration with popular public APIs like JSONPlaceholder and REST Countries, demonstrating efficient data fetching using asynchronous HTTP requests by using the httpx framework in combination with fastapi.

fastapi_async_httpx_blog.py

# pip install fastapi uvicorn httpx

import asyncio
import httpx
from fastapi import FastAPI

app = FastAPI()


async def fetch_data(url: str):
    async with httpx.AsyncClient() as client:
        response = await client.get(url)
        return response.json()


@app.get("/multi_api")
async def multiple_api_requests():
    todos_url = "https://jsonplaceholder.typicode.com/todos/1"
    posts_url = "https://jsonplaceholder.typicode.com/posts/1"
    users_url = "https://jsonplaceholder.typicode.com/users/1"

    tasks = [fetch_data(todos_url), fetch_data(posts_url), fetch_data(users_url)]

    results = await asyncio.gather(*tasks)

    return {"todos": results[0], "posts": results[1], "users": results[2]}