Stack Exchange network consists of 176 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.
Stack Apps is a question and answer site for apps, scripts, and development with the Stack Exchange API. It only takes a minute to sign up.
As above, is there an api function to access a list of tags on super user?
Of course there is, have a look to /tags route documentation.
Summary Gets the tags on all questions, along with their usage counts.
Give it a try.