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Minecraft Development MCP Server
What it is
Minecraft Development MCP Server gives AI assistants tools for working with Minecraft source code and mods. It can download, decompile, remap, and cache Minecraft versions, then search decompiled source and mod code through SQLite full-text indexes. Its 21 tools cover source code, mappings and registry data, analysis and validation, and mod analysis. Developers can inspect Fabric, Quilt, Forge, and NeoForge mod JARs, validate mixins and loader-specific access rules, and compare versions at class and AST levels to spot changes such as altered fields or method signatures. Mapping options include Yarn, Mojmap, Intermediary, and obfuscated names. Yarn covers Minecraft 1.14–1.21.11; versions 26.1 and later use Mojmap, with no Yarn support. Setup instructions cover Claude Desktop, Claude Code, and HTTP clients, and a standalone CLI can return JSON. It is free and MIT-licensed. Decompilation and remapping require Node.js 18 or newer and Java 17 or newer, and its cache uses about 400–500 MB per Minecraft version.
For and against
For
- Supports Fabric, Quilt, Forge, and NeoForge mod JARs
- Compares versions at class and AST levels
- Searches Minecraft and mod source with SQLite FTS5
- Provides a standalone CLI with JSON output
Against
- Requires Node.js 18+ and Java 17+ for decompilation
- Cache uses about 400–500 MB per Minecraft version
- Yarn is unavailable for versions 26.1 and later
The verdict
Minecraft Development MCP Server brings source search, mod inspection, validation, and version comparison into a developer-focused toolset. Its runtime requirements, local cache needs, and mapping coverage are useful to check against a project before setup.
Who it suits
It suits Minecraft mod developers who need to inspect source or mods, validate loader-specific code, or compare game versions. Users need Node.js 18 or newer and Java 17 or newer for decompilation and remapping.
Plans and prices
Open source
MIT-licensed software · Node.js 18+ and Java 17+ required
Read 8 Oct 2026 · github.com
On the record
- Features
- It can download, remap, and decompile Minecraft versions on first use, then cache the results.github.com · read 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.github.com · read 8 Oct 2026
- Installation
- The README recommends global npm installation and also documents running it with npx or building from source.github.com · read 8 Oct 2026
- Install options
- The README recommends global installation through npm and also documents running the package with npx or building from source.github.com · read 8 Oct 2026
- Integrations
- The README documents setup for Claude Desktop and Claude Code, and also describes an HTTP transport for clients or editors.github.com · read 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.github.com · read 8 Oct 2026
- License
- The repository identifies its license as MIT.github.com · read 8 Oct 2026
- Local CLI
- A standalone CLI can invoke the server's tools without an MCP client and returns JSON output.github.com · read 8 Oct 2026
- 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.github.com · read 8 Oct 2026
- Mappings
- It supports Yarn, Mojmap, Intermediary, and obfuscated mapping namespaces for symbol translation.github.com · read 8 Oct 2026
- Minecraft source
- It can retrieve and search decompiled Minecraft Java source, with on-demand downloads and cached results.github.com · read 8 Oct 2026
- Mod loaders
- Its mod JAR analysis supports Fabric, Quilt, Forge, and NeoForge.github.com · read 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.github.com · read 8 Oct 2026
- Purpose
- Minecraft Dev MCP gives AI assistants access to tools for decompiling, remapping, searching, and analyzing Minecraft source code.github.com · read 8 Oct 2026
- Requirements
- The project requires Node.js 18 or newer and Java 17 or newer for decompilation and remapping.github.com · read 8 Oct 2026
- Search
- It provides SQLite FTS5 indexes for full-text search across Minecraft and mod source.github.com · read 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.github.com · read 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.github.com · read 8 Oct 2026
