Configure Price Quote (CPQ) CPQ for SOAP API Developers API Reference Current: Constraint Web Service 2 PDF Download PDF Download page Constraint Web Service 2. Current page Include child pages All pages Constraint Web Service 2 The Constraint web service APIs account for the actions to constraint rules.You can invoke APIs in Constraint Web Service 2 from the following command:Apttus_Config2.ConstraintWebService2.<Name of the Function>where the name of the function is API Name and it's parameters.You can use the constraint web service APIs to complete the following tasks: Associating Constraint Rule to Products Added to the Cart Applying Constraint Rule to All Products Added to the Cart Applying Constraint Rule to Bundles Added to the Cart Retrieving Products Auto-included to the Cart ×