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Best Minecraft library and API plugins for 1.21

40 library and API plugins for Minecraft servers, ranked by how many people use them and how they are rated. The most downloaded is ProtocolLib, with 3.5M downloads.

BlueSlimeCore

by SirBlobmanon Hangar

A useful library plugin that includes lots of helpful code and API features.

Plugins1.8 – 26.xPaper · SpigotLibraries & APIs
Free3,732 downloadsUpdated Jul 21, 2026

QUIPT

by QuickScythe1on Modrinth

QUIPT (Quick's Univeral Integrated Plugin Toolkit) is an ambitious project that aims to provide a handful of tools to both server owners and developers.

Plugins1.8 – 26.xPaper · SpigotAdmin & permissionsLibraries & APIs
Free3,668 downloadsUpdated 3 days ago

Avoid

by Olafcio1on Modrinth

Mod framework that wraps whole Minecraft. Kinda like Bukkit. [#killaislop]

Plugins1.21 – 26.xPaper · SpigotLibraries & APIs
Free3,091 downloadsUpdated 1 day ago

AuraEssentials

by RochaProjectson Modrinth

The best all-in-one plugin: clans, economy, NPCs, TPA, homes, ranks, Bedrock GUI, Discord, extensions API and much more.

Plugins1.21 – 26.xPaper · SpigotAdmin & permissionsEconomy & shops
Free932 downloadsUpdated 7 days ago

Advanced Mining

by CodingBoulderon Modrinth

A plugin that adds a powerful and customizable Mining System. Similar to the one on Hypixel Skyblock.

Plugins1.21 – 26.xPaper · SpigotGameplayLibraries & APIs
Free580 downloadsUpdated 6 days ago

FurnitureLibary

by Ste3et_C0ston Hangar

FurnitureLib Free, FurnitureLib, Protocollib

Plugins1.13 – 26.xPaper · SpigotLibraries & APIs
Free506 downloadsUpdated 9 days ago

YueMi Libs

by NekoMoncion Modrinth

Library Plugin For Minecraft Java Plugins Used By YueMi

Plugins1.21Paper · SpigotLibraries & APIs
Free183 downloadsUpdated 5 days ago

Armo

by Niweron Modrinth

Brings custom 3D armor to your server with pure vanilla compatibility. It also includes JEM (Optifine/CEM/ETF) support for those who are playing with Iris/Opti

Plugins1.21 – 26.xPaper · SpigotLibraries & APIsUtilities
Free75 downloadsUpdated 6 days ago

DialogEngine

by ResourcePackAIon Hangar

Minecraft's own dialog screens, written in YAML: text boxes, dropdowns, sliders, buttons and an API.

Plugins1.21 – 26.xPaper · SpigotLibraries & APIs
Free39 downloadsUpdated 3 days ago

AnnoyingAPI

by srnyxon Hangar

General purpose API for my plugins. Just contains some utility classes and methods.

Plugins1.8 – 26.xPaper · SpigotLibraries & APIs
Free27 downloadsUpdated 11 days ago

MobVitals

by lHawkon SpigotMC

Packet-based health indicators, floating damage & heal popups, and cinematic death animation

Plugins1.16 – 26.xPaper · SpigotLibraries & APIs
Free27 downloadsUpdated 4 days ago

ServerShield

by datamineron Hangar

Packet-level shield for Paper and Folia. Blocks crashers, floods and item bombs in real time.

Plugins1.21 – 26.xPaper · SpigotAdmin & permissionsLibraries & APIs
Free1 downloadsUpdated 14 days ago

How this list is made: plugins are ordered by their downloads here and on the site they come from, with a small boost for good ratings. The numbers update every day.

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