@lleclerc commented on @mrkozma’s file https://netsuiteprofessionals.slack.com/files/U679VC54Z/F6LB317T5/restsharp_call_to_netsuite.cs: You can use wiresharks to compare the query send if you say it work inbetween platform. I find it odds to send cache-control, i am not used to see authorization without uppercase, same for content-type. You can try to log what is sent to your restlet, to see if you just don't handle what is sent.