Install the FoundryMTR Launcher
Download, install, and sign in to the launcher so the modpack and updates are handled for you.
-
Download from the official host
Get the launcher from the Downloads page — official files come only from files.foundrymtr.com, each with a published checksum. Don’t install reuploads.
-
Allow it on first run
The launcher is open-source and currently unsigned: Windows SmartScreen may warn (More info → Run anyway) and macOS may need right-click → Open. Verify the checksum first if unsure.
-
Sign in with Microsoft
Authentication happens inside the launcher, directly with Microsoft. This website never handles your password.
-
Press Play
The launcher installs Java, Fabric, and the modpack, applies any updates, starts Minecraft, and connects you to FoundryMTR.