To use the SMS service without the need of an API or SMPP bind, your users can use a white label portal powered by the Atomic platform.

You can provide your customers with a white labelled portal where they will be able to manage their SMS account. The portal will enable to:

1. Send SMS
2. View received SMS
3. Create Address Books and Contacts
4. Manage and view their Campaigns
5. View delivery reports

Below are some resource that you can go through on getting this setup:

Hosted Portal - White Label

Setup a Custom Domain

Create a User for White Label Portal

Custom SMTP Setup