Carts API: documented overridable fields for line items
The Create a Cart and Add Cart Line Items endpoints now include an Overridable fields table that explicitly lists the catalog values you can override when adding line items to a cart.
list_price— override the product’s price (with a note on promotion eligibility)name— override the product name for locale-specific displayoption_selections.name— override an option or modifier labeloption_selections.value— override an option or modifier value
A new request example on the Add Cart Line Items endpoint demonstrates using price, name, and locale-specific option overrides together.
For details, see Add Cart Line Items.