ModsFinder

SpiritAPI

by jship

SpiritAPI is a library for Fabric and NeoForge that gives other mods one shared interface for energy, fluid and item handling across both loaders.

FabricNeoForgeServer-side onlyMIT LicenseOpen source1.21.1 – 1.21.5

What it does

Mods written against SpiritAPI can use its cross-loader interfaces for energy, fluid and item transfer instead of writing separate code for each loader. The library is built on Architectury API, which must be installed alongside it. SpiritAPI is server-side only, so players join a server without installing it, and it is open source under the MIT License. Two release versions cover 1.21.1 – 1.21.5, with the latest file for 1.21.5.

Key features

  1. Cross-loader interfaces

    Energy, fluid and item handling are exposed through one API that works on both Fabric and NeoForge.

  2. Architectury base

    The library is built on Architectury API, which supplies the cross-platform layer under its interfaces.

  3. Library for other mods

    It is meant for mod authors who want shared API calls rather than end-user features.

Compatibility

Latest build for each game version and loader.

1.21.51.0.0-1.21.51.0.0-1.21.5
1.21.11.0.0-1.21.11.0.0-1.21.1
ReleaseBetaAlphaNot available

Only full game releases are shown. This mod publishes no snapshot builds.

Requirements

Dependencies declared by the latest file for each loader.

Required 1

Architectury APIAn intermediary api aimed to ease developing multiplatform mods.
Required

How it compares

Full comparison

Binding Agent is a Fabric and NeoForge option under the MIT License, currently for 1.21.11, with the client and server both needing it. Platform is an open source library under the GNU Lesser General Public License v3.0 only, covering 1.16.5 – 1.21.1 across four loaders, and it is optional on the client or the server.

ModLoadersGame versionsEnvironmentUpdated
SpiritAPIFabric and NeoForge1.21.1 – 1.21.5Server-side only2025-05-08
Binding AgentFabric and NeoForge1.21.11Client and server2026-04-13
PlatformFabric, Forge, NeoForge and Quilt1.16.5 – 1.21.1Client or server, optional2026-06-08

Questions

Does SpiritAPI need Architectury API?

Yes. Architectury API is a required dependency and must be installed next to SpiritAPI on Fabric or NeoForge.

Do players need SpiritAPI installed?

No. Players join without it, since only the server has to run the mod.

In the catalog

SpiritAPI is one of 3,514 Library mods on ModsFinder, and one of 2,348 Library mods for Fabric. 15,307 mods support Minecraft 1.21.5.

Library mods3,514Fabric modsMods for 1.21.515,307

More from jship

All projects
Haunt Furnace1.19 – 1.21.5Blazing Bamboo Continued1.21 – 1.21.5Basic Fluid Hopper1.19.2 – 1.21.5Bushcraft1.21.1Compostable Recipes1.21.1 – 1.21.5

Similar mods

Fabric API1.14 – 26.3Cloth Config API1.14 – 26.3YetAnotherConfigLib (YACL)1.19 – 26.3Architectury API1.16.5 – 26.3Just Enough Items (JEI)1.8 – 26.3Geckolib1.12.2 – 26.3

What the author says

Spirit API is a cross-loader API I use for my mods that abstracts the Neoforge and Fabric energy, fluid, and item APIs and adds a new similar Soul API. Like many small mod libraries, this one is mostly designed to support my own mods and is not trying to be flexible, comprehensive, or stable.
jship, on the Modrinth page

Official listing

Owner
jship
Published
2025-05-08
Updated on Modrinth
2025-05-08
Facts verified
2026-10-15

Tags

LibraryMagicTechnology
Open on ModrinthCompare