# boolean_smtp_pro_register_providers

> Fires during plugin boot so the Pro addon can register its service providers.

Action · Tier A · Since 1.0.0

The free plugin never contains Pro logic; this is the extension point the Pro addon hooks into to attach its own bindings, routes, and admin UI.

## Signature

```php
add_action( 'boolean_smtp_pro_register_providers', $callback, 10, 1 );
```

## Parameters

| Name | Type | Description |
| --- | --- | --- |
| `$app` | `\BooleanSmtp\Core\Container\Application` | The application container. |

## Fires in

- [app/Providers/AppServiceProvider.php:599](https://github.com/booleanpress/boolean-smtp-src/blob/main/app/Providers/AppServiceProvider.php#L599) — `BooleanSmtp\Providers\AppServiceProvider::registerProExtensionPoints()`

## Example

```php
add_action( 'boolean_smtp_pro_register_providers', function ( \BooleanSmtp\Core\Container\Application $app ) {
    // React to the event.
}, 10, 1 );
```