> ## Documentation Index
> Fetch the complete documentation index at: https://docs.dynamic.xyz/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Authentication screens

<Warning>
  **Step-up authentication** and **device registration** are required
  for all headless integrations. Without these, users will be blocked
  during login or sensitive actions. See the
  [2026\_04\_01 upgrade guide](/overview/migrations/api/2026_04_01).
</Warning>

Implement the screens below based on which authentication methods you've
enabled in your [dashboard](https://app.dynamic.xyz/dashboard). Email
is enabled by default for most projects.

## Screens

| Authentication method  | Description                                                              | Guide                                                      |
| ---------------------- | ------------------------------------------------------------------------ | ---------------------------------------------------------- |
| Email                  | Collect email, send OTP, verify code                                     | [Guide](/swift/authentication)                             |
| SMS                    | Collect phone number, send OTP, verify code                              | [Guide](/swift/authentication)                             |
| Social                 | Trigger OAuth redirect per provider                                      | [Guide](/swift/social-authentication)                      |
| External JWT           | Sign in with an externally issued JWT (enterprise)                       | [Guide](/swift/authentication#external-jwt-authentication) |
| Passkey                | Authenticate with a registered passkey — requires pre-registered passkey | [Guide](/swift/passkey-setup)                              |
| MFA                    | Prompt for TOTP code or passkey                                          | [Guide](/swift/mfa)                                        |
| Step-up authentication | Re-verify identity before sensitive actions                              | [Guide](/swift/step-up-auth)                               |
| Device registration    | Verify identity on unrecognized device login                             | [Guide](/swift/device-registration)                        |