How to find people by email address?

Services lik开发者_如何学Pythone rapportive are able to link an email address with a twitter account and a name. I was wondering how they are doing this?

---

I believe you can use the user search function in the Twitter API to search for email addresses.

Runs a search for users similar to Find People button on Twitter.com. The results returned by people search on Twitter.com are the same as those returned by this API request.

---

Aha, after some searching, rapleaf seems to provide what I was looking for.