WordPress.org

What is site id?

Go to your site's dashboard and look at the URL. You should see a "site_id=123" (example) on the end. In this case, 123 would be your site ID.

What is site key?

The sitekey is a 12-16 character string of random letters and numbers that is unique for every web site and is assigned when you first register your web site with Clicky. Because you don't "login" to the API like you would to a normal web site, every request must be authenticated by your sitekey. Available from site preferences page.