I'm trying OC API Services 1.2RC1 but despite I set Content-Type as application/json, the response is alway in XML format.
I didn't find any topic or bug related.
Any help is appreciated.
SEE THE SOLUTION
It was an issue with REST client.
I have seen something similar using the Perl REST Client. How did you fix that?
I've used another REST client. Currently I'm using Postman, a GUI add-on for Chrome, and works correctly.
Sorry, I can't help you with the Perl REST client.