post https://api.fastspring.com/subscriptions/charge
Charges a customer for their managed subscription.
This API processes charges immediately and sends notifications to the customer. It is used for managed subscriptions that rely on seller actions for charges, reminders, and deactivation, with no internal subscription date tracking.
For large rebill volumes (e.g., January 1st annual renewals), we recommend to divide workloads into batches and call the endpoint sequentially, waiting for each batch to complete.Partial failures in a batch are detailed in the response for each subscription.