You need to sign up a demo account for SAP Cloud platform. SAP SuccessFactors and SAP HANA Cloud Platform, you can easily get SAP Cloud Applications Partner center program. You have to perform some additional configuration for both.
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With use of OData API, it provides with built on protocols like HTTP following the REST methodologies for data transfer. With OData API, you can make use of SuccessFactors in providing Restful integration services for HR data in SAP Cloud.
SAP SuccessFactors uses OData API for extraction and still there is some crucial sets of data accessible only through SFAPI for which OData API is not a correction option.