# SIM Secure Quick APIs Reference This API reference is organized by functional area, which generally equates to resource type. Hope you are enjoying our latest upgrades, but you can still access the [Legacy Documentation](https://www.verizon.com/business/5g-edge-portal/documentation.html) for a limited time ## SIM Secure for IoT Licensing | Method | HTTP Request | Description | | ------ | ---------------------------------------------------------------------------------------------------- | -------------------------------------------------------------------------------- | | POST | [`/devices/license/actions/assign`](/docs/premium-apis/sim-secure/api-endpoints/sim-secure-for-iot-licenses/assignlicensetodevices) | Assigns SIM Secure for IoT licenses to SIMs. | | DELETE | [`/devices/license/actions/assign`](/docs/premium-apis/sim-secure/api-endpoints/sim-secure-for-iot-licenses/unassignlicensetodevices) | Unassigns SIM Secure for IoT licenses for Flexible and Flexible Bundle licenses. | ## Account | Method | HTTP Request | Description | | ------ | -------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | POST | [`/account/subscriptions/actions/list`](/docs/premium-apis/sim-secure/api-endpoints/account-subscriptions/listaccountsubscriptions) | Retrieves the total number of SIM Secure for IoT subscription licenses purchased for your account by license type, and lists the number of licenses assigned and available for each license type. |