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Authentication Tutorials

How-to guides for using two-factor authentication, backup codes, and single sign-on to authenticate.



Two-Factor Authentication

Two-Factor Authentication (2FA) enhances security by requiring both a password and a second step like a login code from a mobile device.

Duo® Security

Duo® Security is a two-factor authentication (2FA) option that combines traditional account credentials with device-based verification.

API Credentials

API authentication credentials allow your API-connected devices and systems to authenticate with WHMCS using API roles that you create.

Single Sign-On

Single Sign-On allows users to log in to a cPanel & WHM or Plesk hosting account directly from a link in WHMCS without reauthenticating.

Application Links

Application Links use WHMCS Single Sign-On to allow users to seamlessly access WHMCS from the cPanel & WHM control panel.

Sign-In Integrations

Sign-in integrations allow customers to connect with our supported platforms — Facebook®, Google®, or X™ (formerly Twitter™) — to quickly sign up or log in to WHMCS.

OpenID Connect

OpenID Connect is the online standard for Single Sign-On and identity provisioning. It uses JSON-based identity tokens (JWT) and OAuth 2.0.

OpenID Connect Development

OpenID Connect uses JSON-based identity tokens (JWT) and OAuth 2.0 to allow third-party applications to access WHMCS with Single Sign-On.