Financial inclusion, a critical component of the Sustainable Development Goals (SDGs), has emerged as a cornerstone of economic development. This study investigates the potential of the Unified Payments Interface (UPI) as a cost-effective, accessible, and scalable FinTech solution to enhance the financial inclusion of women street vendors in Pune. Street vendors represent one of the most financially excluded segments of informal businesses, with women entrepreneurs in this sector facing additional layers of marginalization. The research evaluates the scalability and transferability of UPI as an intervention for empowering similar marginalized communities globally. A mixed-methods approach was adopted, combining stratified cluster sampling to survey women street vendors in selected clusters across Pune with structured questionnaires, expert interviews, and in-depth interviews. Quantitative data from structured questionnaires provided empirical evidence, while in-depth interviews offered nuanced insights into the socio-economic realities of the target population. The research also equipped a triangulation approach for better insights. The study reveals that while the adoption of UPI helps in the social empowerment of women, being able to adopt UPI seamlessly is a privilege in itself. Statistically significant relationships between self-education, income, and adoption of UPI reveal that in the absence of a certain level of income or literacy, the chances of adoption of UPI decrease. The study also identified social exclusion as a major inhibitor of financial inclusion for women street vendors belonging to marginalized communities. Governments and regulatory bodies alike must try to make UPI more accessible to ensure equitable distribution of benefits.