Whomsy is a free whois lookup service. This means that users can search for who owns a given domain, when it was registered, etc. It will also tell users if the domain is unregistered so that they can register it themselves. Developers can access Whomsy's functions programmatically via REST API.
The following is a list of SDKs from our SDK directory that matched your search term. Though your definition of an SDK may differ, in our world, we define SDKs as platform- specific tools for consuming existing APIs of the sort we list in our API directory. For example, the Ruby SDK for consuming the Twitter Ads API. If you think an SDK, API, or other asset is missing from our directory, be sure to check our guidelines for making contributions to ProgrammableWeb.