This behavior is a result of the integration between services and map control made for usability purposes.
The geocoding, routing and search services are designed for using with RadMap control instance. They use RadMap data such as distance unit to provide requests using already specified properties of RadMap. Also the response contains useful information like to the "best view" rectangle for returned data. It required the MapControl, because it depends on a size of the map viewport.
Could you, please, explain your scenario in more details, so we can provide you with further assistance?
the Telerik team
Do you want to have your say when we set our development plans? Do you want to know when a feature you care about is added or when a bug fixed? Explore the Telerik Public Issue Tracking
system and vote to affect the priority of the items