Discuss how India's Unified Payments Interface (UPI) exemplifies the concept of Digital Public Infrastructure (DPI). Examine its role in advancing financial inclusion.

Digital Public Infrastructure means interoperable, publicly governed digital systems on which markets and citizens can build. Launched on 25 August 2016 by NPCI under RBI's regulatory oversight [1], UPI is the flagship layer of India's DPI stack — and, as a mass-scale inclusion tool, its most visible social dividend.

UPI as a model of DPI

• Public governance, open participation: NPCI, a not-for-profit set up by RBI and the Indian Banks' Association under the Payment and Settlement Systems Act, 2007, operates the rails while private apps compete on top [1].
• Interoperability by design: a Virtual Payment Address (name@bank) lets any app pay into any bank account, unlike closed-loop wallets — the very feature the IMF (2025) cited in recognising UPI as the world's largest real-time payment system [2].
• Scale as proof of the public-utility model: 24,162 crore transactions worth ₹314 lakh crore in FY 2025-26, up from a negligible base in 2016-17 [1], and roughly 49% of global real-time payment volume [2].
• Exportability: acceptance in 11 countries makes UPI an instrument of India's DPI diplomacy [1].

Role in advancing financial inclusion

• Reach: 55.49 crore users onboarded by June 2026 [3], with over 700 banks live — including small finance, payments and cooperative banks — extending beyond metro users [1].
• Zero cost to the user: government policy keeps person-to-person UPI free, removing the price barrier that excluded small-value users [4].
• Merchant formalisation: cheap QR-based acceptance draws street vendors and MSMEs into the formal economy, creating transaction trails usable for credit assessment.
• Caveat: inclusion remains conditional on smartphones, connectivity and digital literacy, and rising fraud demands stronger grievance redress.

UPI shows that public digital rails, when open and free at the point of use, can deliver both market innovation and mass access. Consolidating this — through offline and vernacular access, robust fraud governance, and a sustainable revenue model that never charges the small user — would align it firmly with SDG-8's goal of universal financial access.