I found the API to set up an an account with the ability to manage things, and to set the bililing type to "ClientPaysWithMarkup" but what I don't see is a way to allow them to purchase/use bulk credits, and to set their cost. Am I missing something? If it doesn't exist, can you consider this a feature request for the API?
I'm afraid there's no way to get clients to buy their own credits or set their credit price via the API at the moment. I've created a feature request, and we'll let you know when it has been developed.
Is the line by line detail of this still missing from the API?
I noticed all the examples have CanPurchaseCredits": false, when creating a client, and that calling the client using api.createsend.com/api/v3/clients/ doesn't have the line by line detail.
While I'm at it, is this available for monthly billing yet? I can only set a % markup which doesn't match our published prices, which were set using the line-by-line approach.