To use an instance of CentraSite with webMethods Mediator, API-Portal, or Insight you must define a Mediator gateway, an API-Portal gateway, or an Insight gateway that identifies the specific instance of Mediator, API-Portal, Insight or other policy enforcement point that you want to use. The gateway instance specifies the address of the deployment endpoint, which is the endpoint that CentraSite uses to interact with Mediator or API-Portal to deploy virtual services or virtualized APIs.