The concept of RESTful APIs has dramatically changed integrating other applications for the better. REST APIs tend to be a lot easier to integrate to than SOAP or web-service based APIs.
I thought I would put together a cheat sheet for designing and developing RESTful APIs. My hope is that this will solve your questions about versioning, designing consistent URIs, HTTP methods, HTTP status codes, error handling and authentication/authorization.
To get the cheat sheet, simply click on the image below or the link below.