Mike Papageorge gives an in-depth and step-by-step tutorial on how to use Yahoo!’s REST API. His article gives even the novice an opportunity to play with an enormous amount of data that Yahoo! provides through their API.
If you’ve ever wanted to experiment with some of the more popular APIs that are being made available, this tutorial will give you a really great jump into learning how to do it properly. I recommend watching FiftyFourEleven for the ongoing API series that Mike is putting together.