Paper, Purpur, Spigot-compatible servers, Fabric, Quilt, Forge and NeoForge all install with one click from your server's Mods tab, for any Minecraft version they support.
- Sign in to the control panel at panel.chicagoservers.co and open your Minecraft server.
- Open the Mods tab. Under Change software, choose the server software: Paper runs Bukkit, Spigot and Paper plugins; Purpur is Paper with extra gameplay settings.
- Pick the Minecraft version and click Install. The panel sets up the right Java version too. Your worlds and settings stay.

Plugins are then added under Mods, plugins and data packs on the same tab: see How do I install plugins onto my Minecraft server? Spigot itself and CraftBukkit aren't offered, because Paper runs their plugins and is faster.
Some mod authors only allow their mods to be downloaded on CurseForge itself. When a CurseForge modpack has such mods, the Mods tab lists them under the pack; download them from CurseForge and upload them to the mods folder on the Files tab.
Want a server JAR that isn't listed? See Can I run a custom .JAR file on my Minecraft server?
Need help? Open a support ticket and we'll take a look.