Kingdoms

Kingdoms is a Paper server plugin suite for Minecraft 1.21.11. It adds a full kingdoms-style gameplay layer with protected land, cities, nations, diplomacy, wars, production, trading, travel, and admin tools.

The project is intended for multiplayer survival servers that want long-term political gameplay without requiring a client mod.

Features

• Cities with members, treasury, upgrades, claims, travel points, and factories
• Nations with kings, member cities, diplomacy, duchies, war permissions, and conquered cities
• Duchies with assigned cities, duke management, administration requirements, and rebellion gameplay
• Claims with land protection, borders, ownership checks, and resource potential
• Wars with preparation time, attack events, banner objectives, death-drop rules, and block restoration
• Factories for Mine, Farm, Fishery, and Woodworker production
• Jobs with progress, rewards, and cooldowns
• Market and auction systems with search menus
• Mercenary and bounty-style systems
• Road and travel system with city travel points and free travel tickets
• Sidebar scoreboard for important player status
• Optional BlueMap integration for claim, city, nation, market, and factory markers
• Admin menu for testing, setup, balancing, claims, cities, nations, wars, economy, travel, and debug tools
• Starter guide book for new players

Commands

Installation

1. Install Paper for Minecraft 1.21.11.
2. Use Java 21 or newer.
3. Put the Kingdoms plugin JAR into the server plugins folder.
4. Restart the server.
5. Optional: install BlueMap if you want web map markers and claim overlays.

Do not place internal library JARs such as kingdoms-common into the plugins folder by themselves. Use the bundled release JAR provided on this project page.

Requirements

• Minecraft server: Paper 1.21.11
• Java: 21 or newer
• Client mod: not required
• Optional dependency: BlueMap

Optional Resource Pack

Kingdoms has an optional comfort resource pack for custom item textures. The plugin remains playable without it. The resource pack is not required for server gameplay.

If the optional resource pack is distributed on Modrinth, it should be uploaded as a separate resource pack project or handled according to Modrinth's additional file rules.

AI Disclosure

This project was developed with AI assistance. AI assisted with portions of code, documentation, project text, and optional resource pack textures. The project does not use generative AI at runtime and does not connect to an AI service while running.

Because Modrinth does not allow AI-generated images on project pages, do not use AI-generated icons, gallery images, banners, or screenshots for this project page. Use real in-game screenshots or a human-made icon instead.

Data and Privacy

Kingdoms stores gameplay data locally on the server, such as cities, claims, nations, factories, markets, wars, and player-related gameplay state. It does not send telemetry or analytics to external services.

BlueMap, if installed separately, has its own behavior and configuration.

Beta Status

This is a beta release. The main systems are playable, but balancing and edge-case testing are still expected. Please test on a backup world before using it on an important live server.