To use Sage Sales Management RESTful API, you need:
A basic understanding of REST services and how to use them.
A Sage Sales Management Account.
A valid Public API Key and a Private API Key, which can be obtained from the ForceManager support team.
Finally, remember that Sage Sales Management Restful API is an evolving project in beta phase; we will try to communicate changes and any modifications wich may cause backwards, incompatible changes to applications.