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

Benefits

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 WordPress.com.

Custom Settings

By default, if there isn’t already a local account linked to the WordPress.com account, Single Sign On will automatically link the verified WordPress.com 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 WordPress.com 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 WordPress.com 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 WordPress.com 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 WordPress.com 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) WordPress.com Connect (WPCC) module. To provide backward compatibility, it uses the same prefix on the override constants.