Issue Summary

Create API endpoints to retrieve subscription data for a specific Atlassian customer site or user (e.g., list of subscriptions and associated plan details).
Using Atlassian’s Commerce (PPC) APIs, we require more detailed subscription data in order to support licensing workflows, customer reporting, and usage-based billing. While the current endpoint

GET https://api.atlassian.com/commerce/api/v1/entitlements 

Expected Results

An authenticated vendor should be able to use an API to retrieve:

• A list of subscriptions tied to a specific Atlassian customer site or account

• Subscription metadata, such as product, plan (Free, Standard, Premium), and renewal status

• Customer identifiers such as cloud site ID or account ID

This would support vendors in providing more tailored support, reporting, or automation based on customer subscription levels.

Actual Results

There are currently no public APIs that:


Return a customer's list of product subscriptions (across Atlassian products or third-party apps)


Provide plan or billing tier information tied to a specific site or user

Workaround

Required, if there is no workaround please state:
Currently, there is no known workaround for this behavior.