title: How can I use reCAPTCHA v2 on a large number of domains?
body: <p>The previous version of reCAPTCHA provided the option to make a global key which would work on any domain. Now, in version 2, that option is gone, and the reCAPTCHA site claims that "Global Keys are not supported in the V2 API."</p>
  
  <p>I'm working with a large number of domain names that can change frequently without my intervention, and I don't want to have to add each new domain to the key.</p>
  
  <p>Is there a way to get reCAPTCHA to work on any domain without specifically authorizing each one?</p>