Yes you can. Prior to each new SSL certificate renewal on our production API end-points, the new SSL cert will be first provisioned onto the following test API end-points for you to verify your application:
General API end-point: https://www.commzgate.net:442
Reserved API end-point: https://vip.commzgate.net:89
Please refer to https://status.commzgate.com for the latest CA certificates if you are using client cert authentication.
If you are not able to reach these end-points, please contact us.