Looking for logging into the Tumblr Api site and are not getting the correct working link for it? In such a case, you can use the links given here by searching your desired login page in the search box. If the page is present on our website then you will get all the links related to the Tumblr Api site. After that you can login as usual with your login credentials.
https://www.tumblr.com/docs/en/api/v2
https://stackoverflow.com/questions/16327727/how-to-login-to-tumblr-with-api-v2
https://groups.google.com/d/topic/tumblr-api/_jL3BjI4m5U
https://www.atauthentication.com/docs/tumblr.html
https://github.com/tumblr/tumblr.php/wiki/Authentication
https://github.com/tumblr/tumblr.php
https://www.developerdrive.com/2014/05/how-to-get-started-with-the-tumblr-api-part-1/
https://www.programmableweb.com/api/tumblr
http://myobapi.tumblr.com/post/160027299999/introducing-2-factor-authentication
https://pypi.org/project/tumblr-noauth/
https://community.alteryx.com/t5/Alteryx-Designer-Discussions/Tumblr-OAuth/td-p/33829
https://educationcenter.janrain.com/home/tumblr-social-login-configuration-guide
https://support.appreciationengine.com/article/f4AzjfZFo9-creating-a-tumblr-application