> ## Documentation Index
> Fetch the complete documentation index at: https://docs-dev-fix-docs-5546-update-db-search.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

> Describes developer resources such as the Auth0 MFA API and the Guardian SDKs for multi-factor authentication (MFA).

# Multi-Factor Authentication Developer Resources

Using Auth0 SDKs, you can customize your users' <Tooltip tip="Multi-factor authentication (MFA): User authentication process that uses a factor in addition to username and password such as a code via SMS." cta="View Glossary" href="/docs/glossary?term=multi-factor+authentication">multi-factor authentication</Tooltip> (MFA) experience and even build applications on top of our multi-factor capabilities.

## MFA API

[MFA API](/docs/secure/multi-factor-authentication/multi-factor-authentication-developer-resources/mfa-api) endpoints allow you to enforce MFA when users interact with the [Token endpoints](https://auth0.com/docs/api/authentication#get-token), as well as enroll and manage MFA factors.

## Create custom MFA pages

Use the following client libraries to customize the look-and-feel of the MFA page so it matches your organization.

* [Auth0 MFA Client library](https://github.com/auth0/auth0-guardian.js)
* [Create Custom MFA Widget](https://github.com/auth0/auth0-guardian.js/tree/master/example)

## Create custom enrollments

You can [customize the enrollment](/docs/secure/multi-factor-authentication/multi-factor-authentication-developer-resources/create-custom-enrollment-tickets) process for your users by creating custom enrollment tickets.

## Build custom mobile applications

Build custom Guardian-like applications or add multi-factor functionality into your applications using our SDKs.

* [Guardian for Android](/docs/secure/multi-factor-authentication/auth0-guardian/guardian-for-android-sdk)
* [Guardian for iOS](/docs/secure/multi-factor-authentication/auth0-guardian/guardian-for-ios-sdk)

## Learn more

* [Auth0 Guardian](/docs/secure/multi-factor-authentication/auth0-guardian)
* [Guardian for Android SDK](/docs/secure/multi-factor-authentication/auth0-guardian/guardian-for-android-sdk)
* [Guardian.swift iOS SDK](/docs/secure/multi-factor-authentication/auth0-guardian/guardian-for-ios-sdk)
* [Auth0 MFA API](/docs/secure/multi-factor-authentication/multi-factor-authentication-developer-resources/mfa-api)