Episerver has a nice ServiceAPI package that grants you access to some CMS and Commerce functionality using a RESTful approach. It installs via Nuget, and is a pretty painless process... when you have all the information in front of you. After a few hang ups and "gotcha" moments, I eventually got it configured. However, the documentation from Episerver could benefit from a few fillings, and I finally found someone who took care of that for me.
