I am trying to make a REST api call from node.js service, even though the content type i provide is jSON, i am getting the response in an HTML format i.e. it gives entire html page of the composer as a response ,can you help me to get a json response

I am trying to make a REST api call from node.js service, even though the content type i provide is jSON, i am getting the response in an HTML format i.e. it gives entire html page of the composer as a response ,can you help me to get a json response.  i have attached a screen shot of the response im getting.