SCULK
Launcher for Minecraft: Java Edition

Sculk

Profiles with their own look, modpacks and mods straight from Modrinth and CurseForge, and one button to play.

Just for me & my friends Non-commercial Modrinth CurseForge Fabric · Quilt · Forge · NeoForge
Sculk library with profile cards and a large play button
Features

Everything a modded Minecraft setup needs

Each profile is its own game folder with its own version, mod loader, mods, worlds and settings.

Profiles

Vanilla, Fabric, Quilt, Forge or NeoForge on any Minecraft version. Every profile gets an icon and a cover image.

Mods in one click

Search Modrinth and CurseForge, see only versions that fit the profile, and get required dependencies automatically.

Modpacks

Install modpacks from Modrinth and CurseForge, import .mrpack and CurseForge .zip files, export any profile as .mrpack.

Updates & control

Check installed mods for updates, switch them on and off, drag files in. Unknown .jar files are recognized with name and icon.

Java handled

The right Java runtime for each Minecraft version is downloaded from Mojang automatically. Memory per profile or globally.

Logs, worlds, screenshots

A live game log, the worlds and screenshots of each profile, plus playtime and “last played”.

Profile page with installed mods
A profile with its mods, resource packs, shaders, worlds and live log.
Mod search on Modrinth
Search Modrinth or CurseForge. Results are filtered to the selected profile.
Modpack browser
Modpacks become a new profile, including the pack’s icon and artwork.
Profile images

Every profile gets its own look

Pick one of the built-in pixel landscapes – drawn by the launcher itself – or use any image of your own.

Sculk
Meadow
Starry night
Nether
The End
Cherry grove
Sign-in & privacy

How Sculk uses your Microsoft account

Sculk only signs in to start the official game with the account that owns it. Nothing else is done with the account.

1Microsoftdevice code flow
2Xbox Liveuser.auth.xboxlive.com
3XSTSxsts.auth.xboxlive.com
4Minecraftapi.minecraftservices.com
5Playofficial game client

What Sculk does

  • Signs in with the device code flow (scopes XboxLive.signin offline_access): you enter a short code on microsoft.com/link, Sculk never sees your password.
  • Gets an XSTS token for rp://api.minecraftservices.com/, then calls login_with_xbox and /minecraft/profile to launch the game with your name and UUID and to join online-mode servers.
  • Downloads game files, libraries and Java only from Mojang’s official servers.

What Sculk does not do

  • No own servers, no telemetry, no analytics. Tokens stay in a file on the local computer that only the user can read.
  • Tokens are never sent to anyone except Microsoft, Xbox Live and Minecraft Services.
  • Does not modify, share or bypass authentication, and does not change the game itself.
About

Just for me and my friends

Sculk is a launcher I built for myself and share with a few friends. It is free, not sold and not publicly distributed – there is no public download.

Status
Private, non-commercial project for me and a small circle of friends
Download
None – shared privately, not publicly distributed
Platform
Linux desktop
Built with
Python, Qt (PySide6), minecraft-launcher-lib
Content sources
Modrinth API, CurseForge API
Game files
Mojang (piston-meta.mojang.com, resources.download.minecraft.net)
Part of
play-mango.eu