Product Customer-Group Prices — List (GraphQL)
Returns every customer-group (tier) price attached to a product as a plain list — select the fields you need directly on each row (no edges { node { … } } wrapping). Each row carries the quantity threshold, the discount kind (valueType), the discount value, and the customer group it targets. A row with a null customerGroupId (and null customerGroupName) applies to every group.
The productId argument is the parent product.
See the Products overview for how the catalog product menu fits together.

