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GTBC's SpellLib/APIMinecraft mod for 1.21.1

A library mod and common code storage for all of my mods containing helpful tools to make my life easier with ISS add-on making!

newest supported release 1.21.1Library ApiMc Addons
Latest version
gtbcs_spell_lib-2.2.0-1.20.1
Loaders
Forge, NeoForge
Licence
not stated
Downloads
8.8M
Updated
2 mo ago
Available on
CurseForge

Minecraft versions

Every version GTBC's SpellLib/API declares support for, newest first, with the Java runtime that version needs.

Other mods
MinecraftThroughJavaEvidenceReleased
1.21.1Forge, NeoForge21+declared8 Aug 2024
1.21Forge, NeoForge21+declared13 Jun 2024
1.20.1Forge, NeoForge17+declared12 Jun 2023

Download

From GTBC's SpellLib/API’s own host. Nothing is re-hosted here.

For Minecraft 1.21.1

Choose the loader you use before downloading.

  • NeoForge

    gtbcs_spell_lib-2.2.0-1.21.1 · 6 Sept 2026 · gtbcs_spell_lib-2.2.0-1.21.1.jar

    Get NeoForge

Most recently published release

gtbcs_spell_lib-2.2.0-1.20.1release6 Sept 2026

gtbcs_spell_lib-2.2.0-1.20.1.jar · 0.3 MB · for 1.20.1 · Forge

Download this release
753917963574…
Older versions17
  • gtbcs_spell_lib-2.2.0-1.21.16 Sept 20261.21.10.3 MB36cce8ab3117…Get
  • gtbcs_spell_lib-2.1.0-1.20.129 Aug 20261.20.10.3 MB8142ad546a27…Get
  • gtbcs_spell_lib-2.1.0-1.21.129 Aug 20261.21.10.3 MBdb50c17c8e6c…Get
  • gtbcs_spell_lib-2.0.0-1.21.113 Aug 20261.21.10.3 MBa82719cc0a1d…Get
  • gtbcs_spell_lib-2.0.0-1.20.113 Aug 20261.20.10.3 MB3e10a8ae7a4b…Get
  • gtbcs_spell_lib-1.6.0-1.20.14 Aug 20261.20.10.1 MB2.5k downloadscd442edcaf60…Get
  • gtbcs_spell_lib-1.6.0-1.21.14 Aug 20261.21.10.1 MBcb6fba10a953…Get
  • gtbcs_spell_lib-1.5.0-1.20.16 Feb 20261.20.10.1 MB5.0k downloads56e3e339077c…Get
  • gtbcs_spell_lib-1.5.0-1.21.16 Feb 20261.21.10.1 MB1 download6cd001c4142d…Get
  • gtbcs_spell_lib-1.4.0-1.20.127 Dec 20251.20.10.1 MB2.7k downloads4a47a2d18b72…Get
  • gtbcs_spell_lib-1.4.0-1.21.127 Dec 20251.21.10.1 MBbd88af0f5329…Get
  • gtbcs_spell_lib-1.3.1-1.21.128 Sept 20251.21.10.1 MB225.9k downloadsb2fcea7e86dd…Get
  • gtbcs_spell_lib-1.3.0-1.20.17 Sept 20251.20.189 KB5ed55110782f…Get
  • gtbcs_spell_lib-1.3.0-1.21.17 Sept 20251.21.10.1 MBb6f90e2f64e3…Get
  • spell_lib-1.2.0-1.21.13 Sept 20251.21.199 KB5671b82881a5…Get
  • spell_lib-1.0.1-1.21.16 Feb 20251.21.1, 1.2159 KB265.7k downloads98bc234f1f9e…Get
  • spell_lib-1.0.0-1.21.16 Feb 20251.21.1, 1.2159 KB53 downloads9ab90a4f3a7b…Get

Frequently asked

Does GTBC's SpellLib/API work on Minecraft 1.21.1?

Yes. 1.21.1 is the newest Minecraft version GTBC's SpellLib/API 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 GTBC's SpellLib/API support?

Everything the author has declared, from 1.20.1 up to 1.21.1. The full list is in the table above, with the Java runtime each version needs next to it.

Which platform or loader does GTBC's SpellLib/API support?

Forge, NeoForge. 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 GTBC's SpellLib/API?

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.

How do I install GTBC's SpellLib/API?

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 GTBC's SpellLib/API safely?

Start with the author's page on CurseForge, 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.

Details from CurseForge, where the author last updated it on 6 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? .