Here’s a useful list of resources on how to create an API, categorized by programming language. (We also have a post on 30+ ways to make a REST call in different languages)
As an API Marketplace, Mashape helps developers discover, consume, distribute, and monetize private and public APIs. We hope that the tutorials below would help you in your API journey.
(If you’re looking for examples of APIs, check here for a list of face recognition APIs)