To override the Content-type in your clients, use the HTTP Accept Header, append  the .json suffix or  ?format=json
To embed the response in a jsonp callback, append ?callback=myCallback
        
        HTTP + JSON
         The following are sample HTTP requests and responses. 
            The placeholders shown need to be replaced with actual values.
POST /json/reply/QuickRegistrationOptions HTTP/1.1 
Host: doapigw.baasbv.nl 
Accept: application/json
Content-Type: application/json
Content-Length: length
{"ProgCode":"String","RegistrationProfileID":"00000000-0000-0000-0000-000000000000","RegistrationProfiles":[{"ID":"00000000-0000-0000-0000-000000000000","Name":"String","WizardAutomatischDoorlopen":false}],"AttachmentRegistrationProfileID":"00000000-0000-0000-0000-000000000000","AttachmentProfiles":[{"ID":"00000000-0000-0000-0000-000000000000","Name":"String","WizardAutomatischDoorlopen":false}],"RegistrationProfileNewEmailID":"00000000-0000-0000-0000-000000000000","EMailActie":"String","EMailActieNieuw":"String","EMailActieBeantwoorden":"String","EMailActieDoorsturen":"String","DefaultDragDropAction":"CopyEmailIncludingAttachments","RegistratieWizard365URL":"String","ApplicationName":"String","Extension":"String","MenuTonenBijSlepen":false,"AllowMultipleRegistrations":false,"MinimumAttachmentSize":0,"AllowEmptyEmailInRegistrationprofileWizard":false,"UpdateRefNrInSentItems":false}
 
HTTP/1.1 200 OK
Content-Type: application/json
Content-Length: length
{"ProgCode":"String","RegistrationProfileID":"00000000-0000-0000-0000-000000000000","RegistrationProfiles":[{"ID":"00000000-0000-0000-0000-000000000000","Name":"String","WizardAutomatischDoorlopen":false}],"AttachmentRegistrationProfileID":"00000000-0000-0000-0000-000000000000","AttachmentProfiles":[{"ID":"00000000-0000-0000-0000-000000000000","Name":"String","WizardAutomatischDoorlopen":false}],"RegistrationProfileNewEmailID":"00000000-0000-0000-0000-000000000000","EMailActie":"String","EMailActieNieuw":"String","EMailActieBeantwoorden":"String","EMailActieDoorsturen":"String","DefaultDragDropAction":"CopyEmailIncludingAttachments","RegistratieWizard365URL":"String","ApplicationName":"String","Extension":"String","MenuTonenBijSlepen":false,"AllowMultipleRegistrations":false,"MinimumAttachmentSize":0,"AllowEmptyEmailInRegistrationprofileWizard":false,"UpdateRefNrInSentItems":false}