> ## Documentation Index
> Fetch the complete documentation index at: https://docs.breakcold.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Checkbox

> Use checkbox attributes in the Breakcold API.

## Attribute type

`checkbox`

## Use it for

Boolean flags such as active/inactive, opted in, qualified, or customer.

## Request value

Send a boolean.

```json theme={null}
{
  "fields": {
    "is_customer": true
  }
}
```

## Returned shape

Returns a boolean.

## Example response

```json theme={null}
{
  "fields": {
    "is_customer": true
  }
}
```