I need to keep up-to-date the entire list of products, grouped by their product_id. To do that, I only have an admin access to the REST API (magento 1.x). When I fetch the list of products ( /api/rest/products ) I just got their entity_id. They are not attached to a product_id.
Is there a way (just with an API admin access) to retrieve the corresponding product_id using a product's entity_id ?