RQM Reportable REST API

I have a question about the RQM Reportable REST API. It appears that the RQM REST API can return JSON formatted data for HTTP GET requests (such as getting a test case).  However, it appears that HTTP POST requests (such as creating a new test case) are only successful if the request body content is sent as XML format. 

Is this correct, and if so, are there plans in place to support JSON on the POST requests in the near future?