When a Shop's Advanced Shipping Rules App is in test mode, you must include the word “Bambri” in the destination address’ name field in order for rates to be returned.
If the App is in test mode and “Bambri” is not included in the name, the API will return a success header with an error message along with a null rates object.
Example Response in Test Mode without using “Bambri”
HTTP/1.1 200 OK
{
"error":true,
"message":"App is in test mode. Include the word \"Bambri\" in destination address name field to view rates",
"rates":null
}