# Email OTP

Managed Better Auth is built on [Better Auth](https://www.better-auth.com/) and provides full support for Email OTP plugin APIs through the Neon SDK. You do not need to manually install or configure the Better Auth Email OTP plugin.

Email OTP lets users receive a one-time password (OTP) by email and use it to:

- Sign in without a password
- Perform password resets
- Verify their email address (verification codes)

Managed Better Auth UI and Neon SDK are client-side SDKs, so you only invoke their methods. OTP generation and delivery are handled automatically - you do not have direct control over the codes sent to users.

## Prerequisites

- A Neon project with **Auth enabled**

- **Sign-up and Sign-in with Email** enabled in your project's **Settings** → **Auth**.

  :::callout{intent="note" title="Email verification during sign-up"}
  To use Email OTP for sign-up verification, enable **Verify at Sign-up** and select **Verification code** under **Verification method**. <img src="/current/media/t/75c5dc71-055f-4496-bcaf-6966eeb0b645/p/af70e81f-ccf2-4beb-9df8-efafa018b2a1/90a8233ebce63d14bc483333772fb47469f44a14c803bc93522d3e886a59521d.png/raw" alt="Email OTP verification code setting">
  :::

## Use Email OTP with UI components

If you're using Managed Better Auth UI components, enable Email OTP by passing the `emailOTP` prop to `NeonAuthUIProvider`. This enables OTP flows in the pre-built auth UI.

```tsx title="app/layout.tsx"
import { authClient } from '@/lib/auth/client';
import { NeonAuthUIProvider } from '@neondatabase/auth-ui';
import './globals.css';

export default function RootLayout({ children }: Readonly<{ children: React.ReactNode }>) {
  return (
    <html lang="en">
      <body className={'antialiased'}>
        <NeonAuthUIProvider
          authClient={authClient}
          emailOTP
        >
          {children}
        </NeonAuthUIProvider>
      </body>
    </html>
  );
}
```

Users can now sign in with Email OTP by selecting the option on the sign-in screen and entering the one-time code sent to their email.

<img src="/current/media/t/75c5dc71-055f-4496-bcaf-6966eeb0b645/p/af70e81f-ccf2-4beb-9df8-efafa018b2a1/23d11a99336c7a8cf03728832d314143529dfa62b2455f2c766ddc7b7c310842.png/raw" alt="Email OTP verification">

> If you haven't set up Managed Better Auth UI components yet, see the [UI components reference](/guides/auth-reference-ui-components) and the [Next.js](/guides/auth-quick-start-nextjs-api-only) or [React](/guides/auth-quick-start-react) quick start.

## Use Email OTP with SDK methods

You can also implement OTP flows directly using the [Neon SDK](/guides/postgres-reference-javascript-sdk).

### Send an OTP

To send an OTP, call `emailOtp.sendVerificationOtp()` and specify a `type`:

- `sign-in` - passwordless sign-in
- `email-verification` - verify an email address

```typescript title="src/send-otp.ts"
import { authClient } from './auth';

export async function sendSignInOtp(email: string) {
  const { error } = await authClient.emailOtp.sendVerificationOtp({ email, type: 'sign-in' });

  if (error) throw error;
}
```

> For more details, see the [Send verification OTP code](/guides/postgres-reference-javascript-sdk#send-verification-otp-code) in Neon SDK.

### Sign in with OTP

After the user receives the code, sign them in using `signIn.emailOtp()`:

```typescript title="src/sign-in-with-otp.ts"
import { authClient } from './auth';

export async function signInWithOtp(email: string, otp: string) {
  const { data, error } = await authClient.signIn.emailOtp({ email, otp });

  if (error) throw error;
  return data;
}
```

> For more details, see the [Sign in with OTP code](/guides/postgres-reference-javascript-sdk#auth-signinwithemailotp) in Neon SDK.

### Verify email with OTP

If your project has email verification enabled with **verification codes**, Managed Better Auth sends an OTP during sign-up.

Once the user enters the code, verify the email address using `emailOtp.verifyEmail()`:

```typescript title="src/verify-email.ts"
import { authClient } from './auth';

export async function verifyEmail(email: string, otp: string) {
  const { data, error } = await authClient.emailOtp.verifyEmail({ email, otp });

  if (error) throw error;
  return data;
}
```

> For more details, see the [Verify email with OTP code](/guides/postgres-reference-javascript-sdk#verify-email-address) in Neon SDK.

Check out our [Email verification guide](/guides/auth-guides-email-verification) for a complete walkthrough.

### Check an OTP (optional)

If you want to validate an OTP without completing the flow (for example, to check the code before enabling a sensitive UI), you can use `emailOtp.checkVerificationOtp()`:

```typescript title="src/otp.ts"
import { authClient } from './auth';

export async function isOtpValid(email: string, otp: string) {
  const { data, error } = await authClient.emailOtp.checkVerificationOtp({
    email,
    otp,
    type: 'sign-in',
  });

  if (error) throw error;
  return Boolean(data?.success);
}
```

> For more details, see the [Check verification OTP code](/guides/postgres-reference-javascript-sdk#check-verification-otp-code) in Neon SDK.

## Reset Password with OTP

You can also use Email OTP to implement password reset flows. To do this use the `authClient.forgetPassword.emailOtp` method to send a password reset OTP to the user's email address.

```typescript title="src/send-reset-otp.ts"
import { authClient } from './auth';

export async function sendPasswordResetOtp(email: string) {
  const { error } = await authClient.forgetPassword.emailOtp({ email });
  if (error) throw error;
}
```

Once the user receives the OTP, verify it using `authClient.emailOtp.checkVerificationOtp()` with the `type` set to `forget-password`.

```typescript title="src/verify-reset-otp.ts"
import { authClient } from './auth';

export async function verifyPasswordResetOtp(email: string, otp: string) {
  const { data, error } = await authClient.emailOtp.checkVerificationOtp({
    email,
    otp,
    type: 'forget-password',
  });

  if (error) throw error;
  return Boolean(data?.success);
}
```

Finally, reset the user's password using `authClient.emailOtp.resetPassword()`:

```typescript title="src/reset-password.ts"
import { authClient } from './auth';

export async function resetPasswordUsingOtp(email: string, otp: string, newPassword: string) {
  const { data, error } = await authClient.emailOtp.resetPassword({
    email,
    otp,
    password: newPassword,
  });
}
```

## Limitations

Email OTP codes are time-limited and rate-limited.

If users exceed the allowed verification attempts, the API returns an error code like `TOO_MANY_ATTEMPTS` and the user must request a new code.

## Email provider configuration

For production environments, we strongly recommend using a dedicated email provider. The default shared SMTP should be used only during development. Refer to the [Email provider configuration guide](/guides/auth-production-checklist#email-provider) for setup instructions.

A custom SMTP provider changes the sender address but still sends Neon's default templates. For full branding control, use webhooks. See [Customize emails](/guides/auth-guides-customize-emails).

## Need help?

Join our [Discord Server](https://neon.com/discord) to ask questions or see what others are doing with Neon. For paid plan support options, see [Support](/guides/postgres-introduction-support).

## Related pages

- [Admin](./auth-guides-plugins-admin.md)
- [JWT](./auth-guides-plugins-jwt.md)
- [Magic Link](./auth-guides-plugins-magic-link.md)
- [Open API](./auth-guides-plugins-openapi.md)
- [Organization](./auth-guides-plugins-organization.md)
- [Phone Number](./auth-guides-plugins-phone-number.md)

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