The Global.health (G.h) team completed a 100 days mission to provide decision-makers, researchers, and the public with timely and accurate, openly accessible global line-list data for the 2022 monkeypox (MPX) outbreak. Within days of the first report of MPX in England, the G.h team quickly stood-up a MPX tracker using the G.h system design to collect and openly share line-list data through Google Sheets and a GitHub repository. Our international team of curators worked around the clock to provide timely updates, tackling challenges associated with building an emerging disease outbreak dataset in real-time. We discussed