I needed a solver as part of an application and prototyped a simple function using Wolfram Cloud trial. I am interested in calling this function in the web using CloudDeploy/APIFunction.
I’d like to use this function as part of a small-scale professional project. As I understand it, I have to buy a Wolfram|One Professional licence in order to use Instant APIs in commercial applications. However, the licence is too expensive for this simple one-off project.
I’m sorry that our Sales people did not respond, I’ll follow up on that. They were probably going to ask you some questions to understand your situation and find you the best license. Is this for professional usage, are you a student, etc.
In lieu of a Sales conversation, I would recommend you look at the Mathematica Online monthly plans here - Mathematica License Pricing Options A conversation with Sales will probably provide more options, so I’ll follow up with them as well.