PostURL - Display result from response

PostURL - Display result from response

I have a PostURL that is running and I would like to just return responseCode 200 - I attempted to use an executeXPath, but I dont believe the formatting is correct. 

  1. result = twiliocheckmobile.executeXPath("/:responseCode/text()")

  1. {"responseText":{"success":false,"error":{"code":101,"type":"missing_access_key","info":"You have not supplied an API Access Key. [Required format: access_key=YOUR_ACCESS_KEY]"}},"responseCode":200}