Examples: Netflix, Kindle, ClassPass, OpenTable.
Often these services do have _some_ kind of API—but it's super limited and/or only available to huge enterprises.
I'm curious if other people on HN run into this problem—and if so, what's the #1 service you wish had a powerful, startup-friendly API?
That said, I'd love it if Netflix or Pornhub provided their VOD infrastructure as a service. There's a lot of space for content platforms that don't compete with them directly, but are infeasible to get off the ground.
I think a better question then isn't, "which services should have APIs?" but "which companies should provide IaaS?"
I can understand why securely exposing an API for banking details would be challenging, but I would love a way to access my account statements and daily transactions programatically, without having to pass my credentials to shady 3rd-party apps.