Regular Google Accounts (gmail)

https://www.google.com/accounts/o8/id is commonly used.

Its the url of the xrds file.

Google Accounts OpenId Federated Login

You actually have 3 options for the openid identifier:

• https://www.google.com/accounts/o8/site-xrds?hd=example.com

This is the url of the xrds file. Works out-of-the-box.

• https://www.google.com/a/example.com/o8/ud?be=o8

This is the actual openid2.provider url.

To enable using the openid_identifier as the openid2.provider, edit openid.properties:

openid.identifier_as_server = true

• http://www.example.com

With this approach, you are allowing your users to use your site as the openid identifier.

To enable, simply add this to your main page:

<link rel="openid2.provider" href="https://www.google.com/a/example.com/o8/ud?be=o8" />