Since this is not a common HTTP error code we need some more information. Did you do an import mapping directly in the REST call activity? If so you could try to do no import mapping but just retrieve a string response. This way you can pinpoint if the call does not work or something goes wrong with the import mapping. Do also set the REST consume log node to trace in your console (console tab advanced / Set log levels). With this you can inspect all the traffic with the service.
Regards,
Ronald
Hi Vishal,
Did you test this API with Postman or any other tools?
Or please attach some screenshots of errors.
Check the below one
https://community.mendix.com/link/space/java-actions/questions/88528