Request Body format to make a Service Catalog REST API call for 'Buy Item' with variablesSummaryRequest Body format to make a Service Catalog REST API call for 'Buy Item' with variablesInstructionsPOST https://<instance_name>.service-now.com/api/sn_sc/servicecatalog/items/<sc_cat_item_sys_id>/order_now{"sysparm_quantity": "1","variables":{"requested_for":"<sys_id_of_user>","short_description":"Test variable","description":"Test"}}Related LinksIf the variables contains a reference field, please note that the system expects a sys_id value for it. The client can make a get call with a display name and get the sys_id before substituting it in the variables values.