Cookie Parameters

You can define Cookie parameters the same way you define Query and Path parameters.

Import `Cookie`

First import Cookie:

=== "Python 3.10+"

```Python hl_lines="3"
{!> ../../../docs_src/cookie_params/tutorial001_an_py310.py!}
```

=== "Python 3.9+"

```Python hl_lines="3"
{!> ../../../docs_src/cookie_params/tutorial001_an_py39.py!}
```

=== "Python 3.8+"

```Python hl_lines="3"
{!> ../../../docs_src/cookie_params/tutorial001_an.py!}
```

=== "Python 3.10+ non-Annotated"

!!! tip
    Prefer to use the `Annotated` version if possible.

```Python hl_lines="1"
{!> ../../../docs_src/cookie_params/tutorial001_py310.py!}
```

=== "Python 3.8+ non-Annotated"

!!! tip
    Prefer to use the `Annotated` version if possible.

```Python hl_lines="3"
{!> ../../../docs_src/cookie_params/tutorial001.py!}
```

Then declare the cookie parameters using the same structure as with Path and Query.

The first value is the default value, you can pass all the extra validation or annotation parameters:

=== "Python 3.10+"

```Python hl_lines="9"
{!> ../../../docs_src/cookie_params/tutorial001_an_py310.py!}
```

=== "Python 3.9+"

```Python hl_lines="9"
{!> ../../../docs_src/cookie_params/tutorial001_an_py39.py!}
```

=== "Python 3.8+"

```Python hl_lines="10"
{!> ../../../docs_src/cookie_params/tutorial001_an.py!}
```

=== "Python 3.10+ non-Annotated"

!!! tip
    Prefer to use the `Annotated` version if possible.

```Python hl_lines="7"
{!> ../../../docs_src/cookie_params/tutorial001_py310.py!}
```

=== "Python 3.8+ non-Annotated"

!!! tip
    Prefer to use the `Annotated` version if possible.

```Python hl_lines="9"
{!> ../../../docs_src/cookie_params/tutorial001.py!}
```

!!! note "Technical Details" Cookie is a "sister" class of Path and Query. It also inherits from the same common Param class.

But remember that when you import `Query`, `Path`, `Cookie` and others from `fastapi`, those are actually functions that return special classes.

!!! info To declare cookies, you need to use Cookie, because otherwise the parameters would be interpreted as query parameters.

Declare cookies with Cookie, using the same common pattern as Query and Path.