curl "https://app.tatango.com/api/v2/lists/ID/webhooks" -X GET \
  -H "Accept: application/json" \
  -H "Content-Type: application/json" \
  -u emailaddress@mydomain.com:my_api_key \
  -H "Host: example.org" \
  -H "Cookie: "

{
  "status": "OK",
  "per_page": 10,
  "count": 1,
  "page": 1,
  "pages_count": 1,
  "webhooks": [
    {
      "callback_url": "http://localhost/dev/null",
      "created_at": "2016-09-07T14:11:13-07:00",
      "enabled": true,
      "id": 6,
      "list_id": 31,
      "message_sent": false,
      "subscribe": true,
      "unsubscribe": false,
      "updated_at": "2016-09-07T14:11:13-07:00"
    }
  ]
}