title: Google Custom Search and a multi tenant multi domain web application
body: <p>I'm developing an application that runs on several domains. </p>
  
  <p>I want to use Google Custom Search on all of them. But GCS requires to provide the domain(s) of websites to search.</p>
  
  <p>Is there any way to specify domains dynamically? In theory I can have thousands of domains, and I don't like the idea of adding all of them manually.</p>