# CardboardPowered/cardboard

The Bukkit/Spigot/Paper API implementation for Fabric

Repository: https://github.com/CardboardPowered/cardboard
Canonical: https://ross.abutalabs.com/products/cardboardpowered-cardboard
Homepage: https://cardboardpowered.org
Language: Java
License: GPL-3.0
License Family: copyleft
Topics: bukkit, spigot, spigot-api, fabric, fabric-mod, paper-api, hacktoberfest, paper, hacktoberfest2021
Last push: 2026-08-25T21:38:57+00:00

## Health v2 (maintenance only)
Score: 77/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 99, release rhythm 35, longevity 100
- inputs: {"age_days": 2309, "days_push": 8, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1176, forks 87 (observed 2026-08-28T04:03:52.570974+00:00)

## What it is
Cardboard is a Fabric mod that implements the Bukkit/Spigot/Paper plugin API on FabricMC servers. It allows Minecraft server admins to run plugins written for Bukkit and its derivatives on a modded Fabric server.

## Use cases
- run bukkit plugins on a fabric server
- use spigot plugins with fabric mods
- paper api implementation for fabric
- mix fabric mods and bukkit plugins on one server
- migrate a paper server to fabric while keeping plugins
- host a modded minecraft server with plugin support

## When to choose
- you want to combine Fabric mods with existing Bukkit/Spigot/Paper plugins
- you need a plugin API on a Fabric modded server
- you're running a recent supported Minecraft/Fabric version

## When to avoid
- you need full compatibility with every Bukkit plugin (Cardboard does not support all plugins)
- you run Minecraft 1.20 or older (unsupported)
- you want a battle-tested production server where vanilla Paper or Spigot would suffice

## Facets
- artifact type: library
- maturity: active
- function: plugin-system, middleware
- domain: gaming-tools, developer-tools
- platform: jvm, self-hosted
- tags: bukkit-api, spigot, paper-api, fabric-mod, minecraft-server, plugin-compatibility-layer, minecraft

## Member repositories
- CardboardPowered/cardboard (main) score 77

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:03:52.570974+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T06:26:19.194281+00:00, confidence not recorded.
  - readme: https://github.com/CardboardPowered/cardboard (fetched 2026-08-28T04:03:52.570974+00:00, sha 2c09c835a75b)
  - homepage: https://cardboardpowered.org (fetched 2026-08-29T12:32:50.071357+00:00, sha 87f7536a232f)
- Data as of 2026-08-30T08:39:29.467469+00:00.