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Minecraft Development MCP Server

Minecraft Development MCP Server gives AI assistants tools to decompile, remap, search, and analyze Minecraft source code and mods.

Place
#5 of 35
Score
6.6
Minecraft Development MCP Server's website

What Minecraft Development MCP Server is

Minecraft Development MCP Server gives AI assistants tools to decompile, remap, search, and analyze Minecraft source code and mods. On first use, it can download, remap, and decompile Minecraft versions, then cache the results. Its 21 tools cover source code, mappings and registry data, analysis and validation, and mod analysis. Developers can validate Mixin code, Fabric access wideners, and Forge or NeoForge access transformers against source or bytecode. Class-level and AST-level comparisons can reveal changes between versions, while SQLite FTS5 indexes enable full-text searches across Minecraft and mod source. The server can analyze mod JARs for Fabric, Quilt, Forge, and NeoForge, including metadata, dependencies, entry points, and mixin configurations. Mapping namespaces include Yarn, Mojmap, Intermediary, and obfuscated; Yarn is supported for versions 1.14–1.21.11, while versions 26.1 and later support Mojmap but not Yarn. Setup is documented for Claude Desktop and Claude Code, with HTTP transport and a standalone CLI also available. Installation options include global npm, npx, or building from source. The MIT-licensed project is free, but decompilation and remapping require Node.js 18 or newer and Java 17 or newer. Its local cache uses about 400–500 MB per Minecraft version.

Good

  • Analyzes Fabric, Quilt, Forge, and NeoForge mods
  • Compares Minecraft versions at class and AST levels
  • Offers full-text search across source
  • Supports Claude clients, HTTP transport, and a CLI

Watch out

  • Requires Node.js 18 or newer
  • Decompilation and remapping require Java 17 or newer
  • Cache uses about 400–500 MB per Minecraft version
  • Yarn is unavailable for versions 26.1 and later

Who it suits

This server suits Minecraft mod developers who want tools for inspecting source, analyzing mod JARs, validating code, or checking version changes. It is aimed at development workflows rather than general game use.

Verdict

Minecraft Development MCP Server brings source, mod, validation, and comparison tools into development workflows. Check its runtime requirements, disk use, and mapping support for the Minecraft versions you use.

Plans and prices

From Minecraft Development MCP Server's own pricing page, checked 8 Oct 2026.

All about pricing
PlanPriceWhat it gives you
Open sourceFreeMIT-licensed software · Node.js 18+ and Java 17+ required

The facts

Each one read from Minecraft Development MCP Server's own pages, with the date it was checked.

What it does

Features
It can download, remap, and decompile Minecraft versions on first use, then cache the results.checked 8 Oct 2026
HTTP security
The README says loopback binding enables DNS-rebinding protection automatically and warns that binding to a non-loopback host disables that protection.checked 8 Oct 2026
Installation
The README recommends global npm installation and also documents running it with npx or building from source.checked 8 Oct 2026
Install options
The README recommends global installation through npm and also documents running the package with npx or building from source.checked 8 Oct 2026
Integrations
The README documents setup for Claude Desktop and Claude Code, and also describes an HTTP transport for clients or editors.checked 8 Oct 2026
Intended users
The README describes the tools as supporting Minecraft mod development workflows, including analyzing third-party mods, validating mixins, and checking version changes.checked 8 Oct 2026
License
The repository identifies its license as MIT.checked 8 Oct 2026
Local CLI
A standalone CLI can invoke the server's tools without an MCP client and returns JSON output.checked 8 Oct 2026
Minecraft source
It can retrieve and search decompiled Minecraft Java source, with on-demand downloads and cached results.checked 8 Oct 2026
Mod loaders
Its mod JAR analysis supports Fabric, Quilt, Forge, and NeoForge.checked 8 Oct 2026
Mod support
It can analyze and decompile Fabric, Quilt, Forge, and NeoForge mod JARs, including metadata, dependencies, entry points, and mixin configurations.checked 8 Oct 2026
Purpose
Minecraft Dev MCP gives AI assistants access to tools for decompiling, remapping, searching, and analyzing Minecraft source code.checked 8 Oct 2026
Requirements
The project requires Node.js 18 or newer and Java 17 or newer for decompilation and remapping.checked 8 Oct 2026
Search
It provides SQLite FTS5 indexes for full-text search across Minecraft and mod source.checked 8 Oct 2026
Security
The README says loopback binding at 127.0.0.1 enables DNS-rebinding protection; binding to a non-loopback host disables that protection and should be limited to a trusted network, ideally behind a reverse proxy or authentication.checked 8 Oct 2026
Storage
The README says its platform-specific cache uses about 400–500 MB per Minecraft version and can be relocated with CACHE_DIR.checked 8 Oct 2026
Storage and disk use
Downloaded JARs, mappings, decompiled source, and search databases are stored in a local cache that uses about 400–500 MB per Minecraft version.checked 8 Oct 2026
Support
The package metadata links bug reports to the project’s GitHub Issues page.checked 8 Oct 2026
Toolset
The project documents 21 tools in four categories for source code, mappings and registry data, analysis and validation, and mod analysis.checked 8 Oct 2026
Validation
It can validate Mixin code, Fabric access wideners, and Forge or NeoForge access transformers against Minecraft source or bytecode.checked 8 Oct 2026
Version comparison
It offers class-level and AST-level comparisons between Minecraft versions to show changes and potential breaking changes.checked 8 Oct 2026
Version comparisons
It compares Minecraft versions at class and AST levels to identify changes such as modified method signatures and fields.checked 8 Oct 2026

Where it runs

Mapping coverage
Yarn and Mojmap are supported for versions 1.14 through 1.21.11; versions 26.1 and later support Mojmap, while Yarn is unavailable.checked 8 Oct 2026
Mappings
It supports Yarn, Mojmap, Intermediary, and obfuscated mapping namespaces for symbol translation.checked 8 Oct 2026

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