Accessing, understanding, and utilising municipal-level data related to climate governance in Brazil presents significant challenges. In Giulio Carvalho (Diários do Clima)'s TICTeC 2025 presentation, hear how six organisations with expertise in climate journalism, transparency, and open data made a coalition to build an open source platform that collects, processes, and shares local climate-related official acts from 504 cities (and counting!), making them easily accessible and allowing for customised monitoring.