Process Rule for an sObject

Accesses an active workflow rule for an sObject. Use the GET method to retrieve the record or fields. Use the HEAD method to retrieve information in HTTP headers. Use the POST method to trigger the workflow rule.

Cross-object workflow rules can’t be invoked using REST API.

To access all workflow rules, use the Process Rules resource. To access a specific workflow rule that is associated with a specific sObject, use the Process Rule List for an sObject resource.