Passwordless Authentication

Passwordless authentication allows users to log in without needing to remember or enter a password. Instead, they receive a unique, one-time-use code (OTP) or a magic link via email.

Faable Auth provides a simple and secure way to implement this flow using our SDK or API.

[!IMPORTANT] Free Tier Limitation: If you are on the Community (Free) plan, Passwordless authentication is limited to a total of 100 emails (absolute lifetime limit). For unlimited passwordless sessions, consider upgrading to the Professional plan.

---

📸 Flow Overview

---

🛠️ Implementation with @faable/auth-js

The easiest way to implement passwordless login is by using our official JavaScript SDK.

Step 1: Request the Passwordless session

You can choose between receiving a 6-digit code (code) or a magic link (link). This call triggers a request to the /passwordless/start endpoint of the API.

import { createClient } from "@faable/auth-js";

const faableauth = createClient({
  domain: "your-domain.auth.faable.link",
  clientId: "<your_client_id>",
});

// To request a numeric code (OTP)
await faableauth.signInWithPasswordless({
  email: "[email protected]",
  type: "code",
});

// OR, to request a magic link
await faableauth.signInWithPasswordless({
  email: "[email protected]",
  type: "link",
  redirect_to: "https://your-app.com/dashboard",
});

Step 2: Verify the session

Using OTP (One-Time Password)

If the user requested a code, they will receive it in their inbox. You should provide a form for them to enter it and then call the following function to complete the login:

await faableauth.signInWithOtp({
  username: "[email protected]",
  otp: "123456", // The code from the email
});

Using Magic Link

If the user requested a link, the email will contain a link that directs to: https://your-domain.auth.faable.link/passwordless/verify_redirect

If the verification is successful, Faable will automatically redirect the user to the URL specified in the redirect_to parameter during the signInWithPasswordless initial call.

---

🌐 API Reference

If you are not using our SDK, you can interact directly with our API endpoints. Some of the key endpoints involved are:

• POST /passwordless/start: Initiates the passwordless process.

• GET /passwordless/verify_redirect: Verifies a magic link and redirects the user.

---

🔗 Related Sections

• Clients: Configure your application settings.

• Connections: Manage your authentication providers.

• Social Login: Enable login with Google, Facebook, or Apple.