Find user using e-mail address

Question

I'm wondering if there is a simple way of using the API to find users given their e-mail address. So far, I've found the following:

• the search API only lets you search for questions
• the users API lets you filter by dates and by name, but not by e-mail address
• some apps, like StackUsers.com and Stack Users Lite seems promising, but both sites seem to be down (http://stackusers.com and http://stackauth.com/0.9/sites, respectively.)
• the answers to the questions here and here are quite complicated and require much more work than my little application requires.

Answer 1

This is not supported, intentionally. Email addresses are private information, only exposed to employees and moderators of Stack Exchange.

If you want to identify a user using your application, you should use the authentication flow.