Wildcards in API ?

I need to list all "Addon" which are subscribed to.

I can get this one by one by using GET /subscriptions/{subscription_id}

But I need to list all the addons for all the subscription_id's.

Is is possible to use som kind of wildcard for the {subscription_id} ?

I guess this is the only way for me to get such an updated list of "active" addons?