How to host my api with an ssl certificate?

Create a FASTAPI api with python with SSL

To create a Python FastAPI API with an SSL certificate, you will need to have the following:
Python 3.6 or later installed on your system The fastapi and uvicorn packages installed A valid SSL certificate and private key A basic understanding of Python and web development concepts Once you have these prerequisites, you can follow these steps to create your Python FastAPI API with an SSL certificate:

Create a new directory for your project and navigate to it in a terminal or command prompt.

Create a new file named in your project directory and open it in your code editor.

Import the FastAPI class from the fastapi package, and the uvicorn module from the uvicorn package. Then, create a new FastAPI instance and assign it to a variable named app.

from fastapi import FastAPI
import uvicorn

app = FastAPI()

Define your API endpoint(s) using the @app.get() or decorators. For example, to define a simple /hello endpoint that returns a greeting, you could use the following code:

def hello():
    return {"message": "Hello, world!"}

This code defines a hello() function that returns a dictionary containing the message key. The @app.get() decorator specifies that this function should be called when an HTTP GET request is made to the /hello endpoint.

To enable SSL for your API, you will need to specify the paths to your SSL certificate and private key in the FastAPI configuration. You can do this by passing the ssl_keyfile and ssl_certfile keyword arguments to the FastAPI constructor, as shown below:

app = FastAPI(ssl_keyfile="/path/to/your/private.key", ssl_certfile="/path/to/your/certificate.crt")

This code creates a new FastAPI instance and specifies the paths to the SSL certificate and private key files.

Once you have defined your API endpoints and configured SSL, you can start the API by running the uvicorn module in your project directory. For example, you could use the following command to start the API on port 8000 with SSL enabled:

uvicorn main:app --port 8000 --ssl-keyfile /path/to/your/private.key --ssl-certfile /path/to/your


In conclusion, FastAPI is a modern, fast, and efficient Python web framework that makes it easy to create and deploy APIs. It offers a wide range of features and benefits, including a simple and intuitive API design, high performance and scalability, and support for asynchronous programming. FastAPI is also fully compatible with the popular ASGI web server interface, which allows it to run on a variety of web servers and provide a seamless experience for developers and users. Overall, FastAPI is an excellent choice for creating APIs with Python, and is well worth considering for your next API project.

Edit this page on GitHub Updated at Thu, Dec 15, 2022