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

# Consumer authentication

> Use Stytch Consumer API & SDKs to build auth tailored for consumer-based apps.

<Columns cols={3}>
  <Card title="Build auth" icon="log-in" href="/consumer-auth/build-auth/login-or-signup">
    Quickstart to add login or signup to your application.
  </Card>

  <Card title="See examples" icon="github" href="https://github.com/stytchauth/stytch-all-examples">
    Sample apps showcasing how to authenticate users and manage sessions.
  </Card>

  <Card title="API & SDK reference" icon="code" href="/api-reference/consumer/api/overview">
    See reference documentation for the Stytch Consumer API and SDKs.
  </Card>
</Columns>

## Flexible, secure platform

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  <Card title="OAuth" href="/consumer-auth/authentication/oauth/overview">
    Add provider-based logins like Google, Apple, and Github.
  </Card>

  <Card title="One-time passcodes" href="/consumer-auth/authentication/otps/sdk">
    Send passcodes via SMS, email, or WhatsApp.
  </Card>

  <Card title="Magic links" href="/consumer-auth/authentication/magic-links/overview">
    One-click, passwordless login through a magic link.
  </Card>

  <Card title="Passkeys" href="/consumer-auth/authentication/passkeys/overview">
    Add passwordless login using biometrics or PINs.
  </Card>

  <Card title="Biometrics" href="/consumer-auth/authentication/mobile-biometrics">
    Native biometrics support for mobile apps.
  </Card>

  <Card title="Passwords" href="/consumer-auth/authentication/passwords/sdk">
    Add a traditional password-based login or signup.
  </Card>

  <Card title="MFA" href="/consumer-auth/authentication/mfa/overview">
    Add 2-factor authentication for more security.
  </Card>

  <Card title="Bot and fraud protection" href="/fraud-risk/overview">
    Prevent fraud and abuse with device intelligence.
  </Card>

  <Card title="New device notifications" href="/docs/fraud-risk/get-started/use-case/new-device-notifications">
    Alert users when a new device login is detected.
  </Card>
</Columns>

## AI agent authentication

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  <Card title="AI agents" href="/connected-apps/guides/integrate-with-ai-agents">
    Enable AI agents to securely connect to your application.
  </Card>

  <Card title="Connected Apps" href="/connected-apps/overview">
    Enable your application to become an OAuth and OIDC Authorization server.
  </Card>
</Columns>