Couchbase Capella's Public API facilitates integration and interaction with its Control Plane for administrators and developers using various programming languages and platforms. This blog post provides a guide on using the Postman API client to interact with the Capella Public API through its REST interface, specifically using the soon-to-be-deprecated V3 API. While the tutorial details setting up a Postman environment, importing OpenAPI definitions, and configuring authentication with bearer tokens, users are advised against utilizing this version in production due to potential compatibility issues. Instead, they are encouraged to transition to the upcoming V4 API for enhanced features and performance. The tutorial underscores the importance of correctly setting query parameters to retrieve accurate data, exemplified by adjusting the page and perPage parameters in a List Users query.