The present page serves as an overview for the topic. All available documents for the topic can be found here.
Intershop's Omni-Channel Services Toolset is a collection of frameworks that enable fast, standardized development of business web apps like the Intershop Contact Center. Based on open-source technologies, the OCST is decoupled from the Intershop 7/Intershop Commerce Management core platform and uses the REST API (as part of the Synaptic Commerce API) to access data and commerce functionality.
For details about the REST API see: Reference - Omni-Channel Services Toolset REST API.