From the forums: https://hpccsystems.com/bb/viewtopic.php?t=1988&p=8452#p8452
"I am trying to use the REST API from Roxie Cluster to display the data in the Web Application. It seems that HTTP Header is not carrying the below header.
Hence, when the API is accessed from the Web Application (Domain 1) to Roxie Cluster (Domain 2), it is failing to return the Results.
Can you please look into it and enable to the ESP JSON REST API to add the above header as well?"