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PaperMC

22 indexed repositories · View on GitHub

Paper
The most widely used, high performance Minecraft server that aims to fix gameplay and mechanics inconsistencies

Java · 12656 stars
Folia
Fork of Paper which adds regionised multithreading to the dedicated server.

Shell · 4364 stars
Velocity
The modern, next-generation Minecraft server proxy.

Java · 2257 stars
adventure
A user-interface library for Minecraft: Java Edition

Java · 887 stars
Waterfall
BungeeCord fork that aims to improve performance and stability.

Shell · 752 stars
paperweight
Gradle build system plugin for Paper and Paper forks

Kotlin · 317 stars
Paperclip
Bootstrap utility and launcher for the Paper Minecraft server

Java · 126 stars
adventure-platform-mod
An adapter for adventure to integrate with Fabric and NeoForge

Java · 81 stars
DataConverter
Rewrite of the dataconverter system for performance.

Java · 75 stars
docs
Documentation for all projects under the PaperMC umbrella.

MDX · 73 stars
website
The PaperMC website

MDX · 62 stars
mache
Compilable patches for the decompiled Minecraft server

59 stars
diff-viewer
Featureful and performant web-based diff viewer

TypeScript · 50 stars
tack
Paper server launcher with AOT cache management.

Rust · 24 stars
codebook
Library for handling jar remaping logic for PaperMC

Java · 22 stars
fill

Java · 10 stars
patch-roulette
Management tool for updating Paper

TypeScript · 7 stars
update-projects-action

TypeScript · 4 stars
adventurex
Additional libraries for Adventure, a user interface library for Minecraft: Java Edition.

Java · 3 stars
sculptor
Gradle plugin for Mâché

Kotlin · 3 stars
2 more repositories live on View on GitHub

Beginner friendly Everything

Open All

[26.3]PlayerArmSwingEvent incorrectly triggers deprecated warning for PlayerAnimationEvent Open

status: needs triage version: 26.3

Difficulty 3/5 1-2 days Newbie friendliness 68/100

PaperMC/Paper#14277 · Opened Sep 19, 2026
`Player#applyMending(amount)` does not apply mending to itemstacks whose material has no default `max_damage` Open

status: accepted version: 26.2

Difficulty 2/5 1-3 hours Newbie friendliness 88/100

PaperMC/Paper#14275 · Opened Sep 18, 2026
Add GitHub repository and commit links to version and build details Open

Difficulty 3/5 1-2 days Newbie friendliness 68/100

PaperMC/fill-ui#37 · Opened Sep 17, 2026
26.3 support? Open

status: needs triage type: feature

Difficulty 5/5 Over a week Newbie friendliness 35/100

PaperMC/Folia#507 · 1 comment · Opened Sep 16, 2026
No thread context classloader when invoking server main, breaks ServiceLoader lookups (javax.script on Purpur) Open

Difficulty 2/5 1-3 hours Newbie friendliness 88/100

PaperMC/tack#2 · Opened Sep 15, 2026
Document the release vs. SNAPSHOT policy since Velocity 4.x Open

Difficulty 4/5 3-5 days Newbie friendliness 48/100

PaperMC/Velocity#1884 · 1 reaction · Opened Sep 15, 2026
Map autosave regression after maps moved to server-global SavedDataStorage Open

status: needs triage type: bug

Difficulty 3/5 1-2 days Newbie friendliness 72/100

PaperMC/Folia#505 · 5 comments · Opened Sep 14, 2026
Seed randomization feature doesnt work Open

status: needs triage version: 26.2

Difficulty 4/5 3-5 days Newbie friendliness 52/100

PaperMC/Paper#14236 · 6 comments · Opened Sep 7, 2026
Entity is null in BlockReceiveGameEvent for chest interactions Open

status: accepted version: 26.2

Difficulty 3/5 1-2 days Newbie friendliness 56/100

PaperMC/Paper#14234 · Opened Sep 6, 2026
Very unintuitive error message for old configs with `ping-passthrough` Open

type: bug

Difficulty 3/5 1-2 days Newbie friendliness 55/100

PaperMC/Velocity#1876 · 6 comments · Opened Sep 3, 2026
Add support for grouped/list translations in translation stores Open

Difficulty 4/5 3-5 days Newbie friendliness 55/100

PaperMC/adventure#1452 · 2 comments · 1 reaction · Opened Sep 3, 2026
Let plugins control the client-facing onlineMode flag (26.2+) when they rewrite the profile UUID Open

type: feature

Difficulty 5/5 Over a week Newbie friendliness 35/100

PaperMC/Velocity#1875 · Opened Sep 2, 2026
Add API method to retrieve a Block's associated Instrument Open

status: accepted

Difficulty 3/5 1-2 days Newbie friendliness 70/100

PaperMC/Paper#14228 · Opened Sep 1, 2026
Packet spam due to disagreement between client and server because of number clamping Open

status: needs triage version: 26.2

Difficulty 3/5 1-2 days Newbie friendliness 74/100

PaperMC/Paper#14222 · Opened Aug 30, 2026
PlayerProfile cache completions perform web requests Open

status: needs triage version: 26.2

Difficulty 4/5 3-5 days Newbie friendliness 42/100

PaperMC/Paper#14219 · 5 comments · Opened Aug 29, 2026
Packets immediately following JoinGame can be dropped during backend transition (26.2 clock desync) Open

type: bug

Difficulty 4/5 3-5 days Newbie friendliness 45/100

PaperMC/Velocity#1873 · 2 comments · Opened Aug 28, 2026
dialog action commands longer than the chat limit disconnects the player Open

status: needs triage

Difficulty 3/5 1-2 days Newbie friendliness 64/100

PaperMC/Paper#14212 · 2 comments · Opened Aug 24, 2026
invoking retrieveCookie(NamespacedKey) with the same namespace twice deletes the first retrive from the map, resulting in kicks Open

status: needs triage

Difficulty 3/5 1-2 days Newbie friendliness 72/100

PaperMC/Paper#14211 · 6 comments · Opened Aug 24, 2026
[ca.spottedleaf.moonrise.patches.chunk_system.level.entity.EntityLookup] Entity uuid already exists: Open

scope: performance status: needs triage version: 26.2

Difficulty 4/5 3-5 days Newbie friendliness 35/100

PaperMC/Paper#14208 · 1 comment · Opened Aug 23, 2026
AOTMode=create subprocess drops non "-XX:" JVM args, breaking --add-modules / --enable-preview Open

Difficulty 1/5 Under an hour Newbie friendliness 88/100

PaperMC/tack#1 · 1 comment · Opened Aug 22, 2026
I get insanely high amounts of ghost hits even when my ping and specs are good and stable. Open

status: needs triage

Difficulty 4/5 3-5 days Newbie friendliness 45/100

PaperMC/Paper#14202 · 6 comments · Opened Aug 21, 2026
Rejected Allay interaction leaves client inventory and equipment visually desynchronized Open

status: needs triage type: bug

Difficulty 4/5 3-5 days Newbie friendliness 45/100

PaperMC/Folia#502 · 2 comments · Opened Aug 17, 2026
Gradle Isolated Projects Incompatibility Open

Difficulty 2/5 1-3 hours Newbie friendliness 78/100

PaperMC/paperweight#397 · 1 reaction · Opened Aug 16, 2026
World.unloadChunk(x, z, false) cumulatively persists entities to disk Open

status: needs triage version: 26.2

Difficulty 4/5 3-5 days Newbie friendliness 48/100

PaperMC/Paper#14188 · Opened Aug 14, 2026
Intermittent "Unknown node type 3" decoding AvailableCommandsPacket for OP players — colliding argument-type ids resolved by non-deterministic identity-hash order Open

Difficulty 4/5 3-5 days Newbie friendliness 52/100

PaperMC/Velocity#1868 · 1 comment · Opened Aug 13, 2026
DragonBattle API Open

status: accepted version: 26.2

Difficulty 4/5 3-5 days Newbie friendliness 55/100

PaperMC/Paper#14183 · 2 comments · Opened Aug 13, 2026
26.2 : Vanilla bug (MC-310372) causing redstone to randomly stop working when tripwire string is activated. Open

upstream: vanilla version: 26.2

Difficulty 4/5 3-5 days Newbie friendliness 50/100

PaperMC/Paper#14180 · 1 comment · Opened Aug 12, 2026
Add getters for all Component Builder types Open

Difficulty 3/5 1-2 days Newbie friendliness 72/100

PaperMC/adventure#1445 · Opened Aug 12, 2026
Add missing API code for operator permission levels and bypassesPlayerLimit Open

status: needs triage

Difficulty 4/5 3-5 days Newbie friendliness 52/100

PaperMC/Paper#14177 · 5 comments · 1 reaction · Opened Aug 11, 2026
Parallel structure generation corrupts nether fortresses / strongholds Open

status: needs triage

Difficulty 4/5 3-5 days Newbie friendliness 30/100

PaperMC/Paper#14176 · Opened Aug 10, 2026
Inlined sounds are not possible to create using the API Open

status: accepted version: 26.2

Difficulty 3/5 1-2 days Newbie friendliness 55/100

PaperMC/Paper#14171 · Opened Aug 9, 2026
Redstone dust/torches on a Lever's attached block don't update when the lever is toggled programmatically via the Bukkit API Open

status: needs triage version: 1.21.11

Difficulty 4/5 3-5 days Newbie friendliness 45/100

PaperMC/Paper#14170 · 1 comment · Opened Aug 9, 2026
BlockRedstoneEvent not reliably fired for Repeater blocks when redstone-implementation is VANILLA Open

status: needs triage version: 1.21.11

Difficulty 4/5 3-5 days Newbie friendliness 45/100

PaperMC/Paper#14169 · Opened Aug 9, 2026
PlayerTeleportEvent does not fire for most teleports Open

status: needs triage type: bug

Difficulty 4/5 3-5 days Newbie friendliness 48/100

PaperMC/Folia#490 · 6 comments · Opened Aug 9, 2026
Guard more event calls in hot code Open

for: future scope: performance

PaperMC/Paper#14153 · 2 comments · 1 reaction · 1 assignee · Opened Aug 7, 2026
sulfur_cube_bucket does not trigger PlayerBucketEmptyEvent Open

status: accepted version: 26.2

Difficulty 3/5 1-2 days Newbie friendliness 55/100

PaperMC/Paper#14149 · 2 comments · Opened Aug 6, 2026
Per-player projectile limit Open

status: needs triage

Difficulty 5/5 Over a week Newbie friendliness 38/100

PaperMC/Paper#14142 · Opened Aug 4, 2026
EntityPreDamageEvent Open

status: needs triage

Difficulty 5/5 Over a week Newbie friendliness 35/100

PaperMC/Paper#14138 · 2 comments · Opened Aug 4, 2026
The "minecraft.commandblock" permission is broken. Open

status: needs triage version: 26.2

Difficulty 3/5 1-2 days Newbie friendliness 63/100

PaperMC/Paper#14136 · 3 comments · 2 reactions · Opened Aug 3, 2026
BookMeta#asBook yields not full book Open

status: needs triage version: 26.2

Difficulty 3/5 1-2 days Newbie friendliness 50/100

PaperMC/Paper#14135 · Opened Aug 2, 2026
kickPlayer does not take effect immediately Open

status: needs triage version: 26.2

Difficulty 3/5 1-2 days Newbie friendliness 52/100

PaperMC/Paper#14133 · 2 comments · Opened Aug 2, 2026
`reenterConfiguration` can send `block_changed_ack` in the configuration protocol and crash the server Open

status: needs triage version: 26.2

Difficulty 4/5 3-5 days Newbie friendliness 48/100

PaperMC/Paper#14119 · 7 comments · Opened Jul 28, 2026
Mention that catchupTicks set to 1 are equivalent to set to 0 (disabled) Open

Difficulty 2/5 1-3 hours Newbie friendliness 68/100

PaperMC/docs#784 · Opened Jul 28, 2026
Server.properties bug - non-admin players get kicked for spam when sending a single message Open

status: accepted version: 26.2

Difficulty 3/5 1-2 days Newbie friendliness 62/100

PaperMC/Paper#14114 · Opened Jul 27, 2026
Sulfur Cube bucketing ignores cancellation PlayerInteractAtEntityEvent Open

scope: api status: accepted version: 26.2

Difficulty 3/5 1-2 days Newbie friendliness 55/100

PaperMC/Paper#14113 · Opened Jul 27, 2026
Expose CraftServer#ignoreVanillaPermissions to the API Open

status: needs triage

Difficulty 3/5 1-2 days Newbie friendliness 68/100

PaperMC/Paper#14108 · Opened Jul 26, 2026
Repeating `ScheduledTask` stays `CANCELLED_RUNNING` after its callback finishes Open

status: needs triage version: 26.2

Difficulty 3/5 1-2 days Newbie friendliness 65/100

PaperMC/Paper#14107 · Opened Jul 26, 2026
Revivify commands.yml Open

scope: configuration status: accepted

Difficulty 5/5 Over a week Newbie friendliness 35/100

PaperMC/Paper#14102 · 1 comment · Opened Jul 26, 2026
Add .getIgniter() to ExplosiveMinecart Open

status: needs triage

Difficulty 2/5 1-3 hours Newbie friendliness 68/100

PaperMC/Paper#14097 · 1 comment · Opened Jul 23, 2026
MapItemSavedData.carriedByPlayers retains disconnected ServerPlayer references indefinitely Open

scope: performance status: accepted version: 26.2

Difficulty 4/5 3-5 days Newbie friendliness 45/100

PaperMC/Paper#14088 · 4 comments · 1 reaction · Opened Jul 20, 2026

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