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Mainstay SMP ModpackMinecraft modpack for 1.21.11

Modpack for those who want to use all server features

newest supported 1.21.11AdventureOptimizationLightweightMultiplayer
Latest version
5.0.2
Minecraft
1.21.1 to 1.21.11
Java
Java 21+
Loader
Fabric
Licence
LicenseRef-All-Rights-Reserved
Downloads
2.4k
Updated
4 mo ago
Available on
Modrinth
Space NodePartner

Host Mainstay SMP Modpack servers

One click and Mainstay SMP Modpack is installed with the right loader, on hardware built for it.

  • 1.21.11
  • Fabric
  • One click modpack install
  • Dependencies handled
  • Tuned startup flags
  • NVMe SSD
Deploy a serverFrom €0.90 per GB

Screenshots

Click a screenshot to open it. Screenshots are served from the author’s own host and belong to them.

Minecraft versions

Every version Mainstay SMP Modpack declares support for, newest first, with the Java runtime that version needs.

Other modpacks
MinecraftThroughJavaEvidenceReleased
1.21.11Fabric21+declared9 Dec 2025
1.21.10Fabric21+declared7 Oct 2025
1.21.8Fabric21+declared17 Jul 2025
1.21.7Fabric21+declared30 Jun 2025
1.21.4Fabric21+declared3 Dec 2024
1.21.1Fabric21+declared8 Aug 2024

Download

From Mainstay SMP Modpack’s own host. Nothing is re-hosted here.

All 26 releases
5.0.2release5 Apr 2026

Mainstay Minimal edition 1.21.11 5.0.2.mrpack · 0.3 MB · for 1.21.11

Download latest
b3ebd7f047a9…
Older versions24
  • 5.0.124 Feb 20261.21.110.2 MB20 downloadsfe25180ad275…Get
  • 5.0.05 Feb 20261.21.110.2 MB16 downloads90c974545fbf…Get
  • 4.0.317 Dec 20251.21.100.2 MB35 downloads514101a3f84f…Get
  • 4.0.230 Nov 20251.21.100.2 MB17 downloads986c598c72fb…Get
  • 4.0.122 Nov 20251.21.100.3 MB19 downloadsfb08220a1c70…Get
  • 4.0.022 Nov 20251.21.100.2 MB15 downloads9fe4e8cb3b53…Get
  • 3.1.118 Sept 20251.21.80.2 MB43 downloads9cf1caf12c07…Get
  • 3.1.03 Sept 20251.21.80.2 MB49 downloadsb9672eb9d2e7…Get
  • 3.0.030 Jul 20251.21.70.3 MB42 downloadsd0b0790d55bb…Get
  • 2.0.82 May 20251.21.40.7 MB66 downloads9d6faa5fda9b…Get
  • 2.0.71 May 20251.21.40.7 MB45 downloadsae746862bf54…Get
  • 2.0.623 Feb 20251.21.40.7 MB61 downloads35c40e8a48e6…Get
  • 2.0.58 Feb 20251.21.40.7 MB50 downloads250154ada1e0…Get
  • 2.0.426 Jan 20251.21.40.7 MB58 downloadsc7c30e4799b5…Get
  • 2.0.320 Jan 20251.21.40.5 MB51 downloadsf6d3b770279d…Get
  • 2.0.218 Jan 20251.21.40.5 MB71 downloadsa5ba0ff76193…Get
  • 2.0.118 Jan 20251.21.40.5 MB53 downloadsff1c1199263d…Get
  • 2.0.017 Jan 20251.21.40.0 MB56 downloads1280139a6afe…Get
  • 1.1.622 Dec 20241.21.112.8 MB108 downloadsc93d64416abd…Get
  • 1.1.53 Dec 20241.21.111.0 MB95 downloads8131d6151f15…Get
  • 1.1.41 Dec 20241.21.111.0 MB62 downloadse9948a4bd547…Get
  • 1.1.21 Dec 20241.21.111.0 MB56 downloads6510cc3d6697…Get
  • 1.1.110 Nov 20241.21.19.0 MB120 downloads7dbfc185df26…Get
  • 1.1.016 Oct 20241.21.18.6 MB179 downloads9baaad131185…Get

Frequently asked

Does Mainstay SMP Modpack work on Minecraft 1.21.11?

Yes. 1.21.11 is the newest Minecraft version Mainstay SMP Modpack declares support for, and the claim comes from the author's own release metadata rather than from a compatibility list somebody maintains by hand.

Which Minecraft versions does Mainstay SMP Modpack support?

Everything the author has declared, from 1.21.1 up to 1.21.11. The full list is in the table above, with the Java runtime each version needs next to it.

Which loader does Mainstay SMP Modpack need?

Fabric. A build for one loader will not load on another, so this is the first thing to check before the Minecraft version.

Which Java version do I need for Mainstay SMP Modpack?

Java 21 or newer, because that is what the newest Minecraft release it supports requires. The requirement comes from the game rather than from the modpack itself.

What licence is Mainstay SMP Modpack under?

LicenseRef-All-Rights-Reserved, as stated by the author on the platform we synced it from. Check the project's own page before redistributing or bundling it.

How do I install Mainstay SMP Modpack?

Install the matching loader first, then put the downloaded file in your mods folder and start the game. The loader, the modpack and Minecraft all have to be on the same version, which is the usual reason a mod does not appear in game.

Where do I download Mainstay SMP Modpack safely?

From the author's own page on Modrinth, which is where the data here is synced from. MCReference never mirrors, re-hosts or repackages a file: every download button points at the original source, so you get exactly what the author published.

Works on the same versions

Ordered by how much of the recent Minecraft version coverage overlaps, not by popularity.

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Last checked 6 d ago against Modrinth. We do not host files and we do not republish descriptions; every download link points at the author’s own release.

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