Web-based clients can now manage and interact with Couchbase Sync Gateway 3.0 through a RESTful interface using the Postman API client, which facilitates the configuration, administration, and monitoring of the database. The blog post provides a detailed guide on how to use Postman collections, which are organized sets of saved requests, to quickly set up and customize Sync Gateway environments for various administrative tasks. Available on GitHub, these collections include admin, public, and metrics APIs for handling database management, access controls, end-user interactions, and cluster-level statistics. The guide also describes the process of deploying Couchbase Server and Sync Gateway using Docker, along with instructions on setting up users, executing requests, and monitoring activities through Postman. While the collections are a helpful resource for administrators and developers, they are not officially supported by Couchbase, and contributions for updates are encouraged.