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Overview

Prelude Auth is a complete authentication API for developer teams. With this API, you can manage users, handle authentication across multiple methods, track active sessions, and maintain user profiles, all through a simple and secure REST interface.
To enable Prelude Auth on your account, contact us.

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What you can build

  • OTP login: Authenticate users via SMS or email one-time password
  • Password authentication: Email and password login with configurable rules
  • Social login: OAuth with Google, Apple, Microsoft, GitHub, and Okta
  • Step-up authentication: Add scoped, multi-step challenges for sensitive operations
  • Server tokens: Server-to-server authentication using OAuth 2.0 client credentials
  • Session tracking: Monitor active sessions with creation and last-seen timestamps
  • User management: Create, retrieve, update, and delete users with unique identifiers
  • Identity verification: Associate email addresses and phone numbers with user accounts
  • Profile management: Store and update user profile information
  • Webhook integration: Configure event notifications for real-time updates
Prelude Auth handles the session lifecycle for you, including token refresh and revocation, and gates sensitive operations behind step-up challenges.

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Why teams pick Prelude Auth

  • One platform, no data silos: Prelude handles verification and authentication together, so user data carries over. Fraud signals get stronger and false positives drop.
  • Flexible step-up authentication: Trigger scoped challenges only when needed, for sensitive operations like password changes or high-risk transactions, without disrupting the user journey.
  • Pay for what you use: Enable only the authentication methods you need, and pay for those.

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Get started

Follow the Integration Guide to set up your first authentication flow in minutes.