500
The 500
HTTP code is a generic code, like a 200 used in most cases when no more specific code applies
Example response
{
"type": "https://developer.nexmo.com/api-errors#internal-error",
"title": "Internal Error",
"detail": "An internal error occured. Please try again shortly",
"instance": "797a8f199c45014ab7b08bfe9cc1c12c"
}