Worked on enhancing authentication for the Openverse API client within the WordPress/openverse repository, focusing on improving the reliability and security of token exchanges. Implemented support for body serialization and ensured the correct Content-Type header was included in token requests, addressing payload formatting issues and strengthening authentication with the API. Updated and expanded the test suite to cover the new authentication flow, reducing the risk of regressions and preparing the codebase for future API changes. Utilized JavaScript and TypeScript for backend development, API integration, and testing, delivering a targeted feature that improves the project’s security posture and maintainability.