post https://api-sandbox.pismolabs.io/rates/v1/fee/models
Create fee model. A fee model is a structure that defines a collection of fees with custom calculations. You can define the method used to calculate the fee, using a fixed value or a percentage. Fee models can be applied to organizations, programs, and accounts. For more information, see the Fee model guide.
An accumulator fee model requires you call the Create accumulator configuration endpoint first to define how transaction totals are kept. Once the fee model is created, it needs to be attached to an account or attached to a program.