Webservice for Webmaster
These pages are intended for webmasters looking for tools and services for their websites.
If you want to suit your website with a Whois Search you can find here a description with examples of HTML-code how to include such a Whois Query Form.
You want to program your own Whois Service? Then you need a serverlist.
Domaininformation.de uses a huge serverlist which you can also use for free.
The serverlist is offered as a XML file.