Add F4nsix URL Shortener API to URL Shorteners

README.md

@@ -1719,6 +1719,7 @@ API | Description | Auth | HTTPS | CORS |
 | [Clico](https://cli.com/swagger-ui/index.html?configUrl=/v3/api-docs/swagger-config) | URL shortener service | `apiKey` | Yes | Unknown |
 | [Cutt.ly](https://cutt.ly/api-documentation/cuttly-links-api) | URL shortener service | `apiKey` | Yes | Unknown |
 | [Drivet URL Shortener](https://wiki.drivet.xyz/en/url-shortener/add-links) | Shorten a long URL easily and fast | No | Yes | Unknown |
+| [F4NSIX Free URL Shortener](https://www.f4nsix.xyz/api/docs) | Free URL Shortener with Tracker | `apiKey` | Yes | Yes |
 | [Free Url Shortener](https://ulvis.net/developer.html) | Free URL Shortener offers a powerful API to interact with other sites | No | Yes | Unknown |
 | [Git.io](https://github.blog/2011-11-10-git-io-github-url-shortener/) | Git.io URL shortener | No | Yes | Unknown |
 | [GoTiny](https://github.com/robvanbakel/gotiny-api) | A lightweight URL shortener, focused on ease-of-use for the developer and end-user | No | Yes | Yes |