Hey @Gary,
All headers should be passed on through the DSP to the remote endpoint. Can you provide any steps you've taken and more details on your configuration?
Have you checked out some of our docs around this?
- https://www.dreamfactory.com/features/external-integration
- http://wiki.dreamfactory.com/DreamFactory/Features/HTTP_Services
- http://wiki.dreamfactory.com/DreamFactory/Features/Scripting
Thanks,
@AlexBowen