During June 2025, Mingquan Zheng focused on backend development and API integration for the SmartBear/smartbear-mcp repository. He addressed a critical issue in the SwaggerHub API client by correcting the endpoint path for product-related operations, ensuring requests targeted /v1/products/ instead of the incorrect /v1/portals/. Working primarily with TypeScript, Mingquan’s fix improved the reliability and accuracy of API calls, reducing misrouted requests and minimizing support incidents related to data integrity. Although the work centered on a single bug fix rather than new features, it demonstrated careful attention to detail and contributed to the overall stability of the backend system.