* New docs: [FastAPI CLI](https://fastapi.tiangolo.com/fastapi-cli/).

Try it out with:

```console
$ pip install --upgrade fastapi

$ fastapi dev main.py


 ╭────────── FastAPI CLI - Development mode ───────────╮
 │                                                     │
 │  Serving at: http://127.0.0.1:8000                  │