Require a WHMCS module to connect to SmarterTools API for license automatic provisioning.
SmarterTools API Documentation https://services.smartertools.com/Partnerships/Default.aspx#Reseller_class
1. Automatic provisioning of new license purchase upon payment confirmation received in WHMCS by payment gateway.
2. Ability to look up license key with SmarterTools license server for license renewal - together with any add-on enabled for the license key existingly or client purchase during order in WHMCS
3. Ability for new license purchase to purchase add-on during order and automatic provisioning.
I have got an existing module developed by WHMCS developer previously but no longer working as SmarterTools changed the API.