There is currently a limited number of subscription management tasks that can be performed through the SubscriptionBridge API. We are working on reducing the list of what you cannot do, and expanding the list of tasks that you can do

Customer service (subscription management) tasks that can be performed through the SubscriptionBridge API:

• Retrieve a list of all subscriptions associated with a store
  See GetSubscriptionsRequest
• Retrieve details for a specific subscription
  See GetSubscriptionDetailsRequest
• View a history of subscription activity
  See GetSubscriptionHistoryRequest
• Updated an existing subscription (customer information, payment information, etc.)
  See UpdateSubscriptionRequest
• Update a credit card
  See UpdateCreditCardRequest
• Add and remove a custom subscription adjustment
  See AddAdjustmentRequest and RemoveAdjustmentRequest
• Add a usage-based charge (metered charge) to a subscription
  See AddMeteredRequest
• Pay an outstanding balance
  See PayOutstandingBalanceRequest
• Cancel a subscription
  See CancellationRequest

Here are some of the things that we are still working on:

• Add and remove feature
• Switch from a trial to a full subscription
• Cancel

• SubscriptionBridge API start page
• Call reference