(so you can listen to the same song over and over)
webtask.io gives you the ability to run some arbitray code with any HTTP call. One of the features of this that I love is the ability to pass secret parameters to your code, such as auth tokens. In the end this gives you the ability to call authenticated APIs that you couldn’t from your browser without shipping your API client/secret. Think of them as partially applied functions that can be accessed via a simple GET request.
This perfectly fits the bill for any small single page application that has only a few API calls. This is where one of my favorite bands, The National, comes into play.