Software⏱️ 2 min read📅 2026-06-03

How to Fix: FastAPI throws an error (Error loading ASGI app. Could not import module "api")

FastAPI throws an error due to incorrect module name. Check the correct import statement in your FastAPI project.

Quick Answer: Verify that the 'api' module exists and has a valid import statement in your main file.

FastAPI throws an error Error loading ASGI app. Could not import module "api" when using the uvicorn webserver. The issue is often caused by a misconfigured or missing main application file.

⚠️ Common Causes

  • Incorrect import statement in the main application file.

🔧 Proven Troubleshooting Steps

Method 1: Renaming the Main Application File

  1. Step 1: Rename your main application file from `api.py` to `main.py` or any other valid name.

Method 2: Correcting the Import Statement

  1. Step 1: Check your import statement in the main application file to ensure it is correct. The correct syntax should be `from fastapi import FastAPI` and then create an instance of the FastAPI class.

✨ Wrapping Up

To resolve this issue, simply rename your main application file or correct the import statement. Restart the uvicorn webserver and try running it again.

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