Last month I uploaded a community sample that showed how to call an Amazon Web Services RESTful API, in particular for their S3 storage service. That sample is contained within a single form, and is accompanied by some simple instructions and notes on assumptions made etc. I used a form component type, and constructed it to use operations for the actual API calls, so that it would be easy to understand, and easy to modify to a service component, for wider usage.
The main advantage of using this SDK is that becomes possible to avoid a lot of low level coding with the RESTful API. If you study the form sample I mentioned earlier, you will see a lot of code to build canonical requests, and then to sign them securely. This is all buried inside the various SDKs that AWS provides. This was worth a try!