Support Home > Social > Single Sign On Single Sign On

Using the same log-in credentials you use for, you’ll now be able to register for and sign in to self-hosted sites quickly and securely.


  • Millions of users: By adding Single Sign On, you’ll become part of a large family that makes it easy for users to explore new sites.
  • Compatible with your existing sign-in system: Single Sign On is used as a complementary sign-in option to your existing registration system. Once a user connects, they’ll have a user account on your site.
  • Respects your Registration Settings: Single Sign On follow the directives in Settings → General, with respect to whether or not you enable new user registrations. If you don’t, existing users can still use it to log in.
  • Trusted relationship: Allow users to sign-in with the same credentials they use every day on This takes the pain out of having to remember and manage a new log-in for another service.

Setting things up

Once you’ve activated the module in Jetpack, you’re done! All the back-end authentication requests use your site’s already-established link to

Custom Settings

By default, if there isn’t already a local account linked to the account, Single Sign On will automatically link the verified account to a new local account with a matching email address, and log the user in. If you’d prefer to disable this functionality, and require your users to log in to their pre-existing local accounts to manually link the accounts, add this line to your wp-config.php file just before /* That's all, stop editing! Happy blogging. */

define( 'WPCC_MATCH_BY_EMAIL', false );

The Single Sign On module will also respect your default settings with regard to New User Registration. If you have registration disabled, then WPCC will not create a new user account if someone is trying to log in with an unrecognized email. If you have registration turned on, though, it will automatically create a new user for them, and log them in. If you would like to allow users to register for your site with a account, even though you disallow normal registrations, add this line to your wp-config.php file just before /* That's all, stop editing! Happy blogging. */

define( 'WPCC_NEW_USER_OVERRIDE', true );

If you’d like all registered users to log in via instead of the account they created on your site, you can add the following code to your theme’s functions.php file, or to a functionality plugin. It will forward all users to the SSO page, thus bypassing your local log in screen:

add_filter( 'jetpack_sso_bypass_login_forward_wpcom', '__return_true' );

Single Sign On is a replacement for the (now deprecated) Connect (WPCC) module. To provide backward compatibility, it uses the same prefix on the override constants.


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