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HarpyModLoaderMinecraft mod for 1.21.1

Library to load custom roles for The Last Voyage Of The Harpy Express.

client and servernewest supported release 1.21.1UtilityLibrary
Latest version
1.2.5-h1.4
Minecraft
1.21.1
Java
Java 21+
Loader
Fabric
Licence
GPL-3.0-only
Downloads
138.8k
Updated
2 mo ago
Available on
Modrinth
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One click and HarpyModLoader is installed with the right loader, on hardware built for it.

  • 1.21.1
  • Fabric
  • One click mod install
  • Loader matched for you
  • Ryzen CPUs
  • NVMe SSD
Deploy a serverFrom €0.90 per GB

Minecraft versions

Every version HarpyModLoader declares support for, newest first, with the Java runtime that version needs.

Other mods
MinecraftThroughJavaEvidenceReleased
1.21.1Fabric21+declared8 Aug 2024

Download

From HarpyModLoader’s own host. Nothing is re-hosted here.

Most recently published release

1.2.5-h1.4release8 Sept 2026

harpymodloader-1.2.5-h1.4.jar · 0.5 MB · for 1.21.1 · Fabric

Download this release
95a90fe46a6d…
Older versions22
  • 1.2.4-h1.39 Mar 20261.21.10.5 MB40.0k downloadsc0128a591fe1…Get
  • 1.2.3-h1.325 Dec 20251.21.10.5 MB38.7k downloads924c007cbde7…Get
  • 1.2.2-h1.324 Dec 20251.21.10.5 MB570 downloads9519400ca340…Get
  • 1.2.1-h1.323 Dec 20251.21.10.5 MB1.3k downloadsfe8bcdcde137…Get
  • 1.2-h1.323 Dec 20251.21.10.5 MB69 downloads162ea24fa370…Get
  • 1.1.3-h1.322 Dec 20251.21.10.5 MB3.5k downloadsba4ed65aa11a…Get
  • 1.1.2-h1.320 Dec 20251.21.10.5 MB6.4k downloadsce426e4a596e…Get
  • 1.1.1-h1.320 Dec 20251.21.10.5 MB775 downloads46fc5a5fe17d…Get
  • 1.1-h1.319 Dec 20251.21.10.5 MB318 downloads49cb27560ddb…Get
  • 1.0.12-h1.2.618 Dec 20251.21.10.5 MB1.0k downloads2a4369902f7e…Get
  • 1.0.11-h1.2.68 Dec 20251.21.10.5 MB3.4k downloads6d885bac3b4a…Get
  • 1.0.10-h1.2.65 Dec 20251.21.10.5 MB2.5k downloads8f3e72e61098…Get
  • 1.0.9-h1.2.65 Dec 20251.21.10.5 MB47 downloads3ab5c4e81e6f…Get
  • 1.0.8-h1.2.62 Dec 20251.21.10.5 MB17.4k downloads802208b953d9…Get
  • 1.0.7-h1.2.61 Dec 20251.21.10.5 MB326 downloads3f968f4dcfb9…Get
  • 1.0.6-h1.2.630 Nov 20251.21.10.5 MB1.3k downloadse3e7cc5b5405…Get
  • 1.0.5-h1.2.629 Nov 20251.21.10.5 MB955 downloads6ee000eb6136…Get
  • 1.0.4-h1.2.628 Nov 20251.21.10.5 MB404 downloads7047ed898f23…Get
  • 1.0.3-h1.2.627 Nov 20251.21.10.5 MB160 downloads880af1686c11…Get
  • 1.0.3-h1.2.127 Nov 20251.21.10.5 MB37 downloads889b5760a58a…Get
  • 1.0.2-h1.2.126 Nov 20251.21.10.5 MB151 downloadsd487c76a846d…Get
  • 1.0.1-h1.2.126 Nov 20251.21.10.5 MB65 downloads63da3afd1995…Get

Dependencies

What HarpyModLoaderdeclares it needs, from the author’s own release metadata. A required one has to be installed alongside it or it will not load.

YetAnotherConfigLib (YACL)Required. A builder-based configuration library for Minecraft!Wathe: Murder MysteryRequired. A murder mystery social game (core mod for the Last Voyage of the Harpy Express experience)

Frequently asked

Does HarpyModLoader work on Minecraft 1.21.1?

Yes. 1.21.1 is the newest Minecraft version HarpyModLoader declares support for, and the claim comes from the author's own release metadata rather than from a compatibility list somebody maintains by hand.

Do I need to install HarpyModLoader on the client or the server?

Both. Every player needs it installed and so does the server, so anyone joining without it will be refused.

Which platform or loader does HarpyModLoader support?

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

Which Java version do I need for HarpyModLoader?

Among the supported Minecraft releases above, the highest recorded requirement is Java 21 or newer. Use the requirement for the exact Minecraft version you run; previews and snapshots may differ.

What does HarpyModLoader need to run?

It declares YetAnotherConfigLib (YACL) and Wathe: Murder Mystery as required, so those have to be installed alongside it or it will not load. Each one is linked in the dependencies section above.

What licence is HarpyModLoader under?

GPL-3.0-only, 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 HarpyModLoader?

Install the matching loader first, then put the downloaded file in your mods folder and start the game. The loader, the mod 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 HarpyModLoader safely?

Start with the author's page on Modrinth, which is where the data here is synced from. MCReference does not host or repackage files. When available, recorded download links go to the source for that release; verify the publisher, filename and any available checksum before running it.

Works on the same versions

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

GeckoLibA 3D animation library for entities, blocks, items, armor, and more!BookshelfAn open source library for other mods!Cloth Config API (Fabric/Forge/NeoForge)Config Screen API for MinecraftJourneyMapReal-time map used for mapping in-game or your browser as you explore.Architectury APIAn intermediary api aimed to ease developing multiplatform mods.Enchantment DescriptionsAdds in-game descriptions for enchantments to tooltips.

Used by

4 projects list HarpyModLoader as a required dependency.

Noelle's Roles - WatheAdds more roles to doctor4t's The Last Voyage Of The Harpy Express modpack.Stupid Express - WatheMore roles for the Harpy Express modpack / Wathe mod that miiiiight be a little dumb but it's okay!Wathe: ExtendedAdd-on mod for Wathe: Murder Mystery (Core mod of "The Harpy Express: Extended" modpack)G'ExpressAn addon mod for WATHE: Murder Mystery made by Doctor4t. Custom roles, modifiers and map capabilities.

Details from Modrinth, where the author last updated it on 8 Sept 2026. We do not host files or republish descriptions. Available download links point to the author’s own release.

Is this information wrong or missing something? .