In May 2016, we released the newest version of Google Identity Toolkit as Firebase Authentication, and in April 2019, we released Google Cloud's Identity Platform. These products include upgraded client SDKs, open source UI libraries, session management and integrated email sending service for forgotten password flows.

On May 30, 2020, the SDKs documented on this page will stop functioning. (The https://identitytoolkit.googleapis.com/... and https://securetoken.googleapis.com/... endpoints, used by Identity Platform and Firebase Authentication, will continue to function.)

To migrate an existing project from Identity Toolkit, see the Identity Platform migration guide or Firebase Authentication migration guide.

Release Notes

Release notes and minor bug fixes will be posted here.

Version 2

Version 2 includes the following differences:

GITKit v2 integrates with accountchooser.com instead of having a native account chooser.
GITKit v2 uses OAuth2 instead of OpenID2 with the Google IDP.
GITKit v1 includes client libraries and plugins for popular platforms.
GITKit v1 developers should not use the Google API Console to generate the GITKit JavaScript to be included on their site. Instead, they should modify the sample code to fit their site's configuration.

Version 1

The initial version of the API. There are no special notes.