A simple Sciter wrapper for the https://r6.apitab.com/namecheck/ API.
Inspired by this Reddit thread.
Download whichever "scapp.exe" corresponds to your machine from here.
For example, if you're on Windows 64bit:
https://github.com/c-smile/sciter-sdk/tree/master/bin.win/x64/scapp.exe
Put it in the same folder as "main.html" and "main.tis" and run it.