The Subscriptions module is often called AssetsManagementModule on the Connect API. Thus, Subscriptions from can be also referred to as Assets. Furthermore, note that Fulfillment Requests are presented as Subscription Requests or Asset Request. Refer to Connect REST API for more information on the Connect API.
Polling Period Recommendations
In general, the automation script periodically polls for changed data. Thus, it is recommended to process fulfillment queue every 2~5 minutes. Namely, less frequent than 2 minutes (to reduce load on the API queue) and not longer than 5 minutes (to limit order completion time). The polling frequency depends on business requirements for how quickly requests queue changes should be reflected in your systems and it also depends on the Service-level Agreements defined by Providers.
The following provides detailed description of the Subscription (Assets) Management Module REST API.