Gehen Sie als Nächstes auf <a href="http://127.0.0.1:8000/docs" class="external-link" target="_blank">http://127.0.0.1:8000/docs</a>.

Sie werden die automatisch erzeugte, interaktive API-Dokumentation sehen (bereitgestellt durch <a href="https://github.com/swagger-api/swagger-ui" class="external-link" target="_blank">Swagger UI</a>):

![Swagger UI](https://fastapi.tiangolo.com/img/index/index-01-swagger-ui-simple.png)

agregar <a href="https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers" class="external-link" target="_blank">usando el prefijo `X-`</a>.

Pero si tienes headers personalizados que quieres que un cliente en un navegador pueda ver, necesitas agregarlos a tus configuraciones de CORS (leer más en [CORS (Cross-Origin Resource Sharing)](../tutorial/cors.md){.internal-link target=_blank}), usando el parámetro `expose_headers` documentado en <a href="https://www.starlette.dev/middleware/#corsmiddleware"...

Por exemplo:

* <a href="https://code.visualstudio.com/docs/python/environments#_select-and-activate-an-environment" class="external-link" target="_blank">VS Code</a>
* <a href="https://www.jetbrains.com/help/pycharm/creating-virtual-environment.html" class="external-link" target="_blank">PyCharm</a>

/// tip | Dica

Normalmente, você só precisa fazer isso **uma vez**, ao criar o ambiente virtual.

///

Por ejemplo:

* <a href="https://code.visualstudio.com/docs/python/environments#_select-and-activate-an-environment" class="external-link" target="_blank">VS Code</a>
* <a href="https://www.jetbrains.com/help/pycharm/creating-virtual-environment.html" class="external-link" target="_blank">PyCharm</a>

/// tip | Consejo

Normalmente solo tendrías que hacer esto **una vez**, cuando crees el entorno virtual.

///

    * 自動バリデーション、シリアライゼーション、対話的なドキュメント、OAuth2 JWTトークンを用いた認証などを含む、<a href="https://fastapi.tiangolo.com/features/" class="external-link" target="_blank">**その他多くの機能**</a>。
* **セキュアなパスワード** ハッシュ化 (デフォルトで)。
* **JWTトークン** 認証。

There's a mini <a href="https://sqlmodel.tiangolo.com/tutorial/fastapi/" class="external-link" target="_blank">tutorial on using SQLModel with FastAPI</a>. ✨

///

## GitHub Repositories

Most starred <a href="https://github.com/topics/fastapi" class="external-link" target="_blank">GitHub repositories with the topic `fastapi`</a>:

{% for repo in topic_repos %}

<a href={{repo.html_url}} target="_blank">★ {{repo.stars}} - {{repo.name}}</a> by <a href={{repo.owner_html_url}} target="_blank">@{{repo.owner_login}}</a>.

* <a href="https://docs.python.org/3/library/contextlib.html#contextlib.contextmanager" class="external-link" target="_blank">`@contextlib.contextmanager`</a> oder
* <a href="https://docs.python.org/3/library/contextlib.html#contextlib.asynccontextmanager" class="external-link" target="_blank">`@contextlib.asynccontextmanager`</a>

kann auch als gültige **FastAPI**-Abhängigkeit verwendet werden.

Mas você pode sobrescrever esse comportamento utilizando `Response` diretamente, como visto em [Retornando uma Resposta Diretamente](response-directly.md){.internal-link target=_blank}.

### Instalar `pydantic-settings` { #install-pydantic-settings }

Primeiro, certifique-se de criar seu [ambiente virtual](../virtual-environments.md){.internal-link target=_blank}, ativá-lo e então instalar o pacote `pydantic-settings`:

<div class="termy">

```console