Is it possible to check whether the email is already in a list or not via the new MailChimp API v3.0?
I know I can make a post request to the
The ID of the user is the MD5 hash of their email address. So make a call to
/3.0/lists/<list_id>/members/<email_md5> -- if that returns a 404, the user isn't on your list. If you get a 200, the resulting object has a
status field that will tell you whether the user is subscribed or not.