Hello Mark,
The Customer list i am getting from the telinta (means all user i am getting in selection box is registered in telinta.
For the question from you about the error in API testing :
Mark you are doing wrong. The url i have provided to you is not a web url. It is an API url. So need to provide required field in url to get the result.
Below is an example url for you to test.
https://portal.voip.us/api/get-all-number?name=Webmaklay
NOTE: Remember the name of the user is always mandatory, without user name i can not find the specific user data.
