* <ahref="https://andrew-d.github.io/python-multipart/"target="_blank"><code>python-multipart</code></a> - Required if you want to support form <abbrtitle="converting the string that comes from an HTTP request into Python data">"parsing"</abbr>, with `request.form()`.
* <ahref="https://pythonhosted.org/itsdangerous/"target="_blank"><code>itsdangerous</code></a> - Required for `SessionMiddleware` support.
* <ahref="https://pyyaml.org/wiki/PyYAMLDocumentation"target="_blank"><code>pyyaml</code></a> - Required for Starlette's `SchemaGenerator` support (you probably don't need it with FastAPI).
* <ahref="https://github.com/esnme/ultrajson"target="_blank"><code>ujson</code></a> - Required if you want to use `UJSONResponse`.