Note: This release is in preview. Features described here don’t become generally available until the latest general availability date that Salesforce announces for this release. Before then, and where features are noted as beta, pilot, or developer preview, we can’t guarantee general availability within any particular time frame or at all. Make your purchase decisions only on the basis of generally available products and features.
Process Rules
To access all workflow rules that are associated with a specific sObject, use the Process Rule List for an sObject resource. To access a specific workflow rule that is associated with a specific sObject, use the Process Rule for an sObject resource.
Cross-object workflow rules can’t be invoked using REST API.