I needed to perform this task for a customer where I have to create, edit and delete catalog price rules in his magento site based on some backend functionality in another system he runs internally in his organization. While searching I got to know that although there is an API to handle shopping cart price rules:
GET /V1/salesRules/:ruleId GET /V1/salesRules/search POST /V1/salesRules PUT /V1/salesRules/:ruleId DELETE /V1/salesRules/:ruleId
there is none to handle catalog price rules (as mentioned here)
Is there possible solution or will it require creation of custom API to handle these rules?