One bot, many servers
Every invite adds its own server. Prefix settings are not shared.
Discord bot
Iris.
Her name comes from this character. Iris can join many servers at once. Commands are plain text, and the default is !iris. Each server's admin changes the prefix from the dashboard, and other servers stay as they are.
Default prefix!iris
StatusOnline
Servers1
Prefix commands
With the default, type !iris help. A prefix that ends in a symbol can sit against the command, such as !help.
Changed on the web
Sign in with Discord. A server manager can change the prefix, the YouTube list, and which commands are on.
Music in voice
A song title is searched on YouTube, then Iris continues to the next song. Several links or a playlist link become a queue.