If your product is an SDK rather than an Application, the QLM SDK Protection add-on entitles you to protect your SDK with QLM.
It is important to distinguish between QLM SDK Protection and the QLM API. The QLM API is included at no additional cost with your QLM Express, Pro or Enterprise license. The QLM API is an extensive API that allows you to perform operation such as validating a license, activating a license, querying license information, etc. You can find the QLM API reference guide here.
The QLM SDK Protection is an add-on to QLM Pro or QLM Enterprise. You must first purchase the required number of licenses of QLM Pro or QLM Enterprise in order to purchase QLM SDK Protection.
When you purchase QLM SDK Protection, you receive a special SDK license key that you must include in your SDK to enable the QLM API.
The QLM SDK Protection license is a site license that can be used on an unlimited number of products within your organization.