To help anyone that probably visit this page again:
Yes, this is not mentioned on the Sample Code, but you will find it on the Input Parameters section below: https://apidocs.chargebee.com/docs/api/subscriptions#list_subscriptions_customer_id
Hello Eric
You can indeed retrieve all the subscriptions for a customer through the List Subscriptions API by using the customer_id[<operator>] filter parameter. Is this what you were looking for?
Eric Hackborn
I feel like this is a very stupid question, but I don't see anything in either the customer or subscription REST API that covers it. Is there a call to get all subscriptions for a customer? As far as I can tell the list subscription call only allows filtering by plan, and the customer info doesn't seem to include their list of subscriptions.