Does the UPI system have any REST API which I can use to make a project in my computer and make a payment from one source to another? Is it even feasible for such an API to exist? And if so, what kind of authentication will it need?
If there are any existing projects, or Github repos, or ay reference, do let me know!
You can use these references to implement the UPI payment transfer from one source to another. Users can conveniently use their VPA to make a secure and immediate payment without entering any bank or card details.