This policy brief explores India’s Open Network for Digital Commerce (ONDC) as a Digital Public Infrastructure (DPI) aiming to democratise e-commerce for micro, small, and medium enterprises (MSMEs). It highlights the challenges small sellers face in the current digital marketplace and proposes key principles and interventions for inclusive and equitable open-commerce development. The brief emphasises the need to move beyond technology adoption and digitalisation to develop more holistic ecosystem-driven approaches that can strengthen financial, institutional and regulatory support for open-commerce. Ultimately, it seeks to provide a roadmap for G20 countries to foster inclusive and sustainable development through open-commerce initiatives.