I have an idea but maybe someone smarter can flesh it out:

- Create some kind on nostr where we can broadcast these endpoints for discoverability

- Is it possible to give some receipt that I can use to prove I used the API that way any reviews sent on nostr can be verified as real users?

So that way I can search for API's over nostr and see that users who have spent a lot of money seem to be very happy with the service.