I am wondering if you have plans to scale. At this point, I can see you are only pre-screening on the matter if someone is familiar with making a POST request, but have you thought about how to make it modular and more suitable for specific use cases for companies?
e.g. let's say a company works with a specific type of financial API - you could create this so they can implement their own concepts that will eventually lead them to the last request that would be the one you are having now
p.s. sorry if I missed if something like that is already implemented