Add realip.cc

README.md

@@ -558,6 +558,7 @@ API | Description | Auth | HTTPS | CORS |
 | [IP2WHOIS Information Lookup](https://www.ip2whois.com/) | WHOIS domain name lookup | `apiKey` | Yes | Unknown |
 | [ipfind.io](https://ipfind.io) | Geographic location of an IP address or any domain name along with some other useful information | `apiKey` | Yes | Yes |
 | [IPify](https://www.ipify.org/) | A simple IP Address API | No | Yes | Unknown |
+| [RealIp](https://realip.cc/) | A very simple IP Address API | No | Yes | Unknown |
 | [IPinfo](https://ipinfo.io/developers) | Another simple IP Address API | No | Yes | Unknown |
 | [jsDelivr](https://github.com/jsdelivr/data.jsdelivr.com) | Package info and download stats on jsDelivr CDN | No | Yes | Yes |
 | [JSON 2 JSONP](https://json2jsonp.com/) | Convert JSON to JSONP (on-the-fly) for easy cross-domain data requests using client-side JavaScript | No | Yes | Unknown |