# Application owners

Use these operations to register applications to the Rebilly Apps Store and manage application instances.
An application owner is a person or organization that has submitted an app to the Rebilly App Store.
For more information, see [Submit an app](https://www.rebilly.com/docs/dev-docs/submit-a-rebilly-app/).

## Register an application

 - [POST /applications](https://www.rebilly.com/static/_spec/catalog/all-3.0/application-owners/postapplication.md): Registers an application and displays it publicly in the App Store.
Before you submit an application, read the App Store documentation.

## Retrieve application instances

 - [GET /applications/{id}/instances](https://www.rebilly.com/static/_spec/catalog/all-3.0/application-owners/getapplicationinstancecollection.md): Retrieves application instances with specified IDs.

## Retrieve an application instance

 - [GET /applications/{id}/instances/{organizationId}](https://www.rebilly.com/static/_spec/catalog/all-3.0/application-owners/getapplicationinstancebyorganization.md): Retrieves an application instance with specified application and organization IDs.

## Application instance was disabled

 - [POST application-instance-disabled](https://www.rebilly.com/static/_spec/catalog/all-3.0/application-owners/application-instance-disabled.md)

## Application instance was enabled

 - [POST application-instance-enabled](https://www.rebilly.com/static/_spec/catalog/all-3.0/application-owners/application-instance-enabled.md)