There are 2 repositories under fortnite-cosmetics topic.
A Fortnite HTTP/XMPP bot coded in Python with party capabilities.
Async python library for interacting with Fortnite's API and XMPP services.
A Fortnite HTTP/XMPP bot coded in JavaScript with party capabilities.
Fortnite Autoleaker is an open source program created in python.
[Probably outdated] SchuhFN is a simple Fortnite lobby bot that works with Simple commands.
PolyCosmetic