How to make a UPI app?

Building a UPI application involves a structured process regulated by the National Payments Corporation of India (NPCI) and the Reserve Bank of India (RBI). The key steps include:

• Partnering with a sponsor bank that acts as a Payment Service Provider (PSP).
• Registering with the NPCI to access necessary APIs and technical infrastructure.
• Developing a secure mobile application with features like bank linking, virtual payment address (VPA) creation, and PIN authentication.
• Undergoing rigorous security audits and technical certifications by NPCI-approved labs to ensure compliance with digital payment safety standards.