Abstract: Enabling a third-party data service to update custom data objects is described. A database system outputs a data object to a user device in response to receiving a user selection of the data object. The database system outputs a data service object, associated with a third-party data service, to the user device in response to receiving a user selection of the third-party data service. The database system stores metadata that maps between a data field, associated with the data object, and a data service field, associated with the data service object, in response to receiving a user selection of the data field and the data service field. The database system updates an instance of the data object by using the metadata to send request data to the third-party data service and using the metadata to receive response data from the third-party service.