# Paymentus Authentication API

**Canonical:** https://apis.io/apis/paymentus/paymentus-authentication-api/  
**Provider:** Paymentus — https://apis.io/providers/paymentus/  
**Base URL:** https://api.paymentus.com  
**Documentation:** https://developer.paymentus.io/

Paymentus Authentication API is one of 2 APIs that [Paymentus](https://apis.io/providers/paymentus/) publishes on the [APIs.io](https://apis.io/) network. Tagged areas include Authentication, JWT, and Scopes. The published artifact set on APIs.io includes API documentation and SDKs.

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.

## Machine-readable artifacts (2)

- **Documentation** — https://developer.paymentus.io/
- **SDK** — https://www.npmjs.com/package/@paymentus/auth

## Other Paymentus APIs (1)

- [Paymentus XOTP API](https://apis.io/apis/paymentus/paymentus-xotp-api/)

## Tags

Authentication, JWT, Scopes

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/paymentus/paymentus-authentication-api/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/paymentus/.