To get an overview over the platform for the C4C competition, it's best to signup for the main CauseMe platform and watch the video tutorial in the HowTo page there.
C4C covers a wide range of datasets featuring a number of climate and weather data challenges (see figure). Participants download datasets, run their own causal discovery method, and upload their predictions (matrices of causal connections). The platform evaluates and ranks the methods according to the AUC performance metric. After signing up and logging in, more information and example code snippets are given.