Finding if domain name is already registered?

Question

Hi, Is there any API to lookup if a given domain name is already registerd by somebody and get alternative (auto suggested available domain names)?

EDIT:- I think the thing I need is called domain-search not the lookup :)

Answer 1

thanks for your support. I've found a service by domaintools.com called whoisapi. You can query available domain names and other information by sending an xml request to their servers.