# Hub Button - For External Apps
> If `installId` is defined, hub button works as integrated, showing "view integration". If `installId` isn't defined, hub button works as new integration, showing "Integrate with Pagar.me";
>
> If `environment` is defined as `dev`, hub button will take you to the `development` environment, otherwise to the `production` environment;
```html
Test Hub Button
```
