Deployment using CentraSite Control
In CentraSite Control, Mediator supports only Web Services Stack (WSSTACK) Mediation for deployment.
The WSSTACK Mediation:

Axis framework based and therefore provides limited capabilities

Supports both SOAP and REST web service APIs

Default configuration
The deployment method for virtual services is defined by the configuration parameter, restServiceStack, in the customization file, centrasite.xml. By default, this parameter is set to wsstack. Any new Virtual Service asset that is published to Mediator goes to WSStack Mediation.