DiscordMC is a plugin for Spigot which allows you to send messages from Minecraft to Discord and vice versa
https://www.spigotmc.org/resources/17067/
This plugins uses Discord4j to interact with Discord
Plugin releases can be found on the Spigot page
DiscordMC uses Maven to build
$ mvn clean install
You have an optimization or a new idea you want to implement? Don't hesitate to open a Pull Request against the dev branch