The API allows to manage prices in this respect:
Managing services in a price list
The API allows to add, modify and delete the services in a price list.
For example: Adding a new translation service, setting unit prices and discounts, deleting a service etc.
Modifying price list properties
The API currently does not allow to create a new price list, to modify existing price list properties or to delete price lists.
These operations can only be done today from the user interface.