* FastAPI provides more features on top of Starlette. Features that you almost always need when building APIs, like data validation and serialization. And by using it, you get automatic documentation for free (the automatic documentation doesn't even add overhead to running applications, it is generated on startup).

It was one of the first examples of **automatic API documentation**, and this was specifically one of the first ideas that inspired "the search for" **FastAPI**.

!!! note
    Django REST Framework was created by Tom Christie. The same creator of Starlette and Uvicorn, on which **FastAPI** is based.


!!! check "Inspired **FastAPI** to"
    Have an automatic API documentation web user interface.

### Documentation automatique

Documentation d'API interactive et interface web d'exploration. Comme le framework est basé sur OpenAPI, de nombreuses options sont disponibles. Deux d'entre-elles sont incluses par défaut.

platforms/ide/ide-native/         @gradle/bt-ide-experience @gradle/bt-native-maintainers

# Documentation
platforms/documentation/docs/src/docs/                                                        @gradle/bt-devrel-education
platforms/documentation/docs/src/samples/                                                     @gradle/bt-devrel-education
platforms/documentation/docs/src/docs-asciidoctor-extensions-base/                            @gradle/bt-devrel-education

        style core_execution stroke:#1abc9c,fill:#b1f4e7,stroke-width:2px,color:#000;
    end
    style core fill:#c2e0f4,stroke:#3498db,stroke-width:2px,color:#000;

    documentation["documentation module"]
    style documentation stroke:#1abc9c,fill:#b1f4e7,stroke-width:2px,color:#000;

    ide["ide module"]
    style ide stroke:#1abc9c,fill:#b1f4e7,stroke-width:2px,color:#000;

    subgraph software["software platform"]

    This is incredibly helpful while developing and debugging code that interacts with your API.

## Documentation

And when you open your browser at <a href="http://127.0.0.1:8000/docs" class="external-link" target="_blank">http://127.0.0.1:8000/docs</a>, you will see an automatic, interactive, API documentation like:

<img src="/img/tutorial/path-params/image01.png">

!!! check

      including but not limited to software source code, documentation
      source, and configuration files.

      "Object" form shall mean any form resulting from mechanical
      transformation or translation of a Source form, including but
      not limited to compiled object code, generated documentation,
      and conversions to other media types.

And those Python files are included/injected in the documentation when generating the site.

### Docs for tests

Most of the tests actually run against the example source files in the documentation.

This helps to make sure that:

* The documentation is up-to-date.
* The documentation examples can be run as is.
* Most of the features are covered by the documentation, ensured by test coverage.

def ARTIFACT_TYPE = Attribute.of('artifactType', String)
def RUNTIME_ATTRIBUTE = objects.named(Usage, Usage.JAVA_RUNTIME)
def DOCUMENTATION_ATTRIBUTE = objects.named(Category, Category.DOCUMENTATION)
def SOURCES_ATTRIBUTE = objects.named(DocsType, "gradle-source-folders")

configurations {
    baseline
    baselineClasspath {
        extendsFrom baseline

Vous obtiendrez cette réponse JSON :

```JSON
{"message": "Hello World"}
```

### Documentation interactive de l'API

Rendez-vous sur <a href="http://127.0.0.1:8000/docs" class="external-link" target="_blank">http://127.0.0.1:8000/docs</a>.