During April 2025, Baixian Zhang developed and integrated a new public API router for the DataBytes-Organisation/Project-Echo repository, enabling unauthenticated users to filter event data by time range, species, and microphone ID. Working primarily with Python, FastAPI, and MongoDB, Baixian designed endpoints for both router activation testing and flexible data querying, then incorporated the router into the main FastAPI application. This feature addressed the need for open data exploration without authentication barriers. The work focused on backend API development, with no major bugs reported, and demonstrated a solid understanding of scalable API design and integration within a modern Python stack.