Enhancement: Ability to Terminate Records through a Web Service Call

This is an enhancement request. We would like the ability to call a web service that can terminate records similar to how a user can do this in the front end of the application. We have a BP that has an upper form that can be canceled or terminated, but the line items/action items remain open. We would like to build an interface that identifies the canceled/terminated upper forms and automatically terminates all the associated action items. We have many interfaces that have been built to update or create actions items, but we are unable to terminate. Users/admins currently have