Paymentus Authentication API
The Authentication API issues short-lived JWT access tokens for the XOTP payment surface. A client signs a request with a pre-shared key (identified by a key id / kid and a three-letter application acronym / tla), declares the granular scopes it needs (for example xotp, xotp:profile, xotp:payment, xotp:autopay, xotp:accounts) or a pixel that maps to those scopes, and receives a Bearer token used on subsequent XOTP calls. Documented publicly via the @paymentus/auth Node.js SDK.