This is because FastAPI uses this `root_path` to create the default `server` in OpenAPI with the URL provided by `root_path`.

## Additional servers

!!! warning
    This is a more advanced use case. Feel free to skip it.

By default, **FastAPI** will create a `server` in the OpenAPI schema with the URL for the `root_path`.

* `@app.post()`
* `@app.put()`
* `@app.delete()`

And the more exotic ones:

* `@app.options()`
* `@app.head()`
* `@app.patch()`
* `@app.trace()`

!!! tip
    You are free to use each operation (HTTP method) as you wish.

    **FastAPI** doesn't enforce any specific meaning.

    The information here is presented as a guideline, not a requirement.

    "pydantic-extra-types >=2.0.0",
]

[tool.mypy]
strict = true

[[tool.mypy.overrides]]
module = "fastapi.concurrency"
warn_unused_ignores = false
ignore_missing_imports = true

[[tool.mypy.overrides]]
module = "fastapi.tests.*"
ignore_missing_imports = true
check_untyped_defs = true

[[tool.mypy.overrides]]
module = "docs_src.*"
disallow_incomplete_defs = false

### Worker Processes and Ports

Remember from the docs [About HTTPS](https.md){.internal-link target=_blank} that only one process can be listening on one combination of port and IP address in a server?

This is still true.

So, to be able to have **multiple processes** at the same time, there has to be a **single process listening on a port** that then transmits the communication to each worker process in some way.

### Memory per Process

* 🐛 Fix overriding MKDocs theme lang in hook. PR [#10490](https://github.com/tiangolo/fastapi/pull/10490) by [@tiangolo](https://github.com/tiangolo).
* 🔥 Drop/close Gitter chat. Questions should go to GitHub Discussions, free conversations to Discord.. PR [#10485](https://github.com/tiangolo/fastapi/pull/10485) by [@tiangolo](https://github.com/tiangolo).

## 0.104.0

## Features

          - griffe_typingdoc
          show_root_heading: true
          show_if_no_docstring: true
          preload_modules:
          - httpx
          - starlette
          inherited_members: true
          members_order: source
          separate_signature: true
          unwrap_annotated: true
          filters:
          - '!^_'
          merge_init_into_class: true
          docstring_section_style: spacy

```

with a JSON body containing something like:

```JSON
{
    "description": "Payment celebration",
    "paid": true
}
```

and it would expect a response from that *external API* with a JSON body like:

```JSON
{
    "ok": true
}
```

!!! tip

  url: https://github.com/konstantinos1981
- login: fabianfalon
  count: 2
  avatarUrl: https://avatars.githubusercontent.com/u/3700760?u=95f69e31280b17ac22299cdcd345323b142fe0af&v=4
  url: https://github.com/fabianfalon
three_months_experts:
- login: YuriiMotov
  count: 75
  avatarUrl: https://avatars.githubusercontent.com/u/109919500?u=e83a39697a2d33ab2ec9bfbced794ee48bc29cec&v=4
  url: https://github.com/YuriiMotov
- login: Kludex

For this reason it's common to provide them in environment variables that are read by the application.

## Environment Variables

!!! tip
    If you already know what "environment variables" are and how to use them, feel free to skip to the next section below.

{% endif %}

### FastAPI 专家 - 三个月

这些是在过去三个月中 [在 GitHub 上帮助他人解答最多问题](help-fastapi.md#github_1){.internal-link target=_blank} 的用户。 😎

{% if people %}
<div class="user-list user-list-center">
{% for user in people.three_months_experts[:10] %}