Worked on the coveo/platform-client repository to enhance API key privilege management by introducing a targeted feature for more precise privilege retrieval. Developed an optional filter parameter for the listApiKeysPrivileges API, allowing users to specify which privileges to retrieve, particularly those relevant for custom API key creation. Implemented a dedicated filter interface and enum in TypeScript, integrating them into the backend logic to streamline requests. Comprehensive tests were added to ensure robust filter behavior and handle edge cases. This work improved security and developer productivity by reducing unnecessary data transfer and simplifying client-side filtering, while maintaining a clean, extensible API surface.