> ## Documentation Index
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> Use this file to discover all available pages before exploring further.

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---

# Validate Call

Decorator for validating function calls.

## validate\_call

```python
def validate_call(
    *,
    config: ConfigDict | None = None,
    validate_return: bool = False,
) -> Callable[[AnyCallableT], AnyCallableT]
def validate_call(func: AnyCallableT, /) -> AnyCallableT
```

Usage Documentation

[Validation Decorator](/docs/validation/latest/concepts/validation_decorator)

Returns a decorated wrapper around the function that validates the arguments and, optionally, the return value.

Usage may be either as a plain decorator `@validate_call` or with arguments `@validate_call(...)`.

### Returns

`AnyCallableT` | [`Callable`](https://docs.python.org/3/library/typing.html#typing.Callable)\[\[`AnyCallableT`\], `AnyCallableT`\] -- The decorated function.

### Parameters

**`func`** : `AnyCallableT` | [`None`](https://docs.python.org/3/library/constants.html#None) _Default:_ `None`

The function to be decorated.

**`config`** : [`ConfigDict`](/docs/validation/latest/api/pydantic/config/#pydantic.config.ConfigDict) | [`None`](https://docs.python.org/3/library/constants.html#None) _Default:_ `None`

The configuration dictionary.

**`validate_return`** : [`bool`](https://docs.python.org/3/library/functions.html#bool) _Default:_ `False`

Whether to validate the return value.