The Premium API: Application Hosting upgrade provides access to APIs with limited API calls.

If your mobile or web application exceeds the API limit you'll need to increase your limits to ensure that your services continue.

If your capacity exceeds 1.5x your allocation the API will be automatically disabled for the remainder of the month.

Information about allocated API Limit can be found here:

Check API limit for Premium API: Application Hosting

Information about increasing your API limit can be found here:

How to increase my limits. Booster: API Calls

How to check your allocated capacity and usage:

Login to Capitan and to to "Settings", you will find your license usage and capacity on the right hand side of the page.