How to send usage data from my externally hosted app?

We are hosting our application our self. A customer can order it from within PANTARIS Marketplace.
The customer needs to be charged for the provisioned application: a base fee plus a fee for usage.

How can we provide the fees to PANTARIS? Is there an API? We want to send each hour so it is always up to date.
I checked the PANTARIS documentation and API explorer but could not find anything on this.

Thanks, Erwin

Checkout pricing plans for customer related fees.