Send feedback Service Usage Docs Concepts Overview Overview Describes the basic Service Usage concepts. Other Concepts Enabled Service Describes the requirements for calling a service. Public and Private Services Describes the differences between public and private services. Was this page helpful? Let us know how we did: Send feedback Except as otherwise noted, the content of this page is licensed under the Creative Commons Attribution 4.0 License, and code samples are licensed under the Apache 2.0 License. For details, see our Site Policies. Java is a registered trademark of Oracle and/or its affiliates.