The India Stack is a name given to a family of APIs, open standards, and infrastructure components that allow a user in India to demand services digitally. As o

The India Stack is a name given to a family of APIs, open standards, and infrastructure components that allow a user in India to demand services digitally. As of 2019, the services the India Stack offers are proving identity, completing KYC, making digital payments, signing documents digitally and sharing of data. As the article notes, While the list of APIs is growing, some of the APIs listed - Authentication, KYC, eSign, UPI - are now mature, well understood, and enable efficient delivery of services in India. This article is written by the technologists who designed and built the stack from top to bottom. The Indiastack experience offers multiple lessons in technology, systems, and regulatory architectures.