Define scripted REST API headers Define scripted REST API headers to control which headers the API accepts and can respond with. Before you beginThere must be a Scripted REST API defined before you can create headers.Role required: web_service_admin Procedure Navigate to System Web Services > Scripted REST APIs. Select a scripted REST API record. In the Request Headers related list, click New. Enter a Header name. (Optional) Select Is required to make this header mandatory for all requests to associated scripted REST resources. Enter a Short description and Example value to explain how to use the header. Click Submit. What to do nextAfter defining available headers, associate the headers with a scripted REST resource.