Update README.md

README.md

@@ -295,6 +295,7 @@ API | Description | Auth | HTTPS | CORS |
 | [StackExchange](https://api.stackexchange.com/) | Q&A forum for developers | `OAuth` | Yes | Unknown |
 | [Verse](https://verse.pawelad.xyz/) | Check what's the latest version of your favorite open-source project | No | Yes | Unknown |
 | [XML to JSON](https://developers.wso2apistore.com/) | Integration developer utility APIs | No | Yes | Unknown |
+| [IP2WHOIS Information Lookup](https://www.ip2whois.com/) | WHOIS domain name lookup | `apiKey` | Yes | Unknown |
 
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 ### Dictionaries