You can retrieve all the Sales rules that are related to the given product by Cart Price Rule Search REST API in Magneto.
Let’s say product SKU “A10001” is associated with two different cart price rules and you want to fetch a list of all the sales rules that are associated with the given SKU.
Magento native supports Cart Rule Search Rest API which will be helpful to fetch products associated with cart rules. Continue reading “Get All Sales/Cart rules associated with product by REST API Magento 2.”