NuPay for Business - Authentication API
OAuth2 app-based authorization, CIBA (Client-Initiated Backchannel Authentication) for web flows, OTP validation, and token issuance / refresh for NuPay merchant integrations.
NuPay for Business - Authentication API is one of 5 APIs that Nu (Nubank) publishes on the APIs.io network.
Tagged areas include OAuth2, CIBA, and Authentication. The published artifact set on APIs.io includes API documentation.