PMechDB is a live platform for aggregating, curating, and distributing chemcial reactions in the form of elementary radical steps to accelerate research in chemoinformatics and radical reaction modeling. The PMechDB platform is designed to facilitate training deep learning and other AI models in data-driven workflows using its tabular data, with no need for additional pre-processing steps It provides a unified model that ought to facilitate data sharing, model building, dissemination, and publications. We encourage the community to explore and use the PMechDB data and functionalities, and contribute to its expansion.