There have been many updates to Horizon since HacVersionListBot, it is now outdated deeply in most all respects. It makes little attempt to be accurate to Horizons original behaviour. Its use constitutes a significant risk of the certificate being banned.
Versionlist update tracker for the Nintendo Switch.
To use: Dump your Nintendo switch's client certificate, and convert it to .p12 format with the password "switch", and replace resources/ConsoleCert.p12 with it.
For Discord integration, replace the discord webhook url string resource with a webhook for your channel.
Licensing:
This software is licensed under the terms of the GPLv3.
You can find a copy of the license in the LICENSE file.