import java.math.*
import java.util.*
import net.servicestack.client.*
open class FileExists
{
    var Url:String? = null
}
open class FileExistsResponse
{
    var Exists:Boolean? = null
    var Url:String? = null
    var FileID:UUID? = null
    var DocumentID:UUID? = null
    var DocumentQueuedForRegistrationID:Int? = null
}
To override the Content-type in your clients, use the HTTP Accept Header, append the .csv suffix or ?format=csv
The following are sample HTTP requests and responses. The placeholders shown need to be replaced with actual values.
POST /csv/reply/FileExists HTTP/1.1 
Host: doapigw.baasbv.nl 
Accept: text/csv
Content-Type: text/csv
Content-Length: length
{"Url":"String"}
HTTP/1.1 200 OK
Content-Type: text/csv
Content-Length: length
{"Exists":false,"Url":"String","FileID":"00000000-0000-0000-0000-000000000000","DocumentID":"00000000-0000-0000-0000-000000000000","DocumentQueuedForRegistrationID":0}