// SCAN REPORT

Minecraft Dev MCP

20 tools. 5 can modify or destroy data without limits.

5 write tools that can modify data. Rate limits recommended.

Last updated: 11 Jun 2026

5 can modify or destroy data

15 read-only

20 tools total

Community server · catalogue entry verified 11/06/2026

How to control Minecraft Dev MCP ↓

TOOL MAP

What Minecraft Dev MCP exposes to your agents

Read (15) Write / Execute (5) Destructive / Financial (0)

Running more than one server? Check your whole stack →

MOST DANGEROUS TOOLS

High Risk

The most dangerous Minecraft Dev MCP tools

Execute · High decompile_minecraft_version This tool performs multiple external operations: downloading a JAR from a remote server, executing a remapping pipeline, and running a decompiler (VineFlower) across all classes. Execute · Medium decompile_mod_jar This tool executes a decompilation process on an arbitrary JAR file path provided by the user, running external decompiler tooling and writing output to the filesystem. Execute · Medium remap_mod_jar This tool processes a JAR file and transforms its bytecode/mappings, which constitutes executing a transformation operation on a file. Write · Low index_minecraft_version Creating a search index is a Write operation: it generates and stores searchable data structures without deleting or overwriting existing Minecraft source code.

5 of Minecraft Dev MCP's 20 tools can modify, destroy, or commit something on every call — and an agent calls them with no built-in limits.

POLICY

How to control Minecraft Dev MCP

PolicyLayer is an MCP gateway — it sits between your AI agents and Minecraft Dev MCP, and nothing reaches the server without passing your rules. These are the rules we recommend:

Rate limit write operations

{
  "index_minecraft_version": {
    "limits": [
      {
        "counter": "index_minecraft_version_per_hour",
        "window": "hour",
        "max": 30,
        "scope": "grant"
      }
    ]
  }
}

Prevents bulk unintended modifications from agents caught in loops.

Cap read operations

{
  "analyze_mixin": {
    "limits": [
      {
        "counter": "analyze_mixin_per_minute",
        "window": "minute",
        "max": 60,
        "scope": "grant"
      }
    ]
  }
}

Controls API costs and prevents retry loops from exhausting upstream rate limits.

Create a free account and register Minecraft Dev MCP — nothing to install.
Add these rules — paste them, or build them visually. Tune the limits to your setup.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

ENFORCE POLICY ON MINECRAFT DEV →

Free to start. No card required.

FULL CATALOGUE

All 20 Minecraft Dev MCP tools

EXECUTE 3 tools

Execute decompile_minecraft_version Decompile an entire Minecraft version. By default downloads the client JAR from Mojang, remaps it to the chose Execute decompile_mod_jar Decompile a mod JAR file to readable Java source code. The JAR can be either the original mod JAR (with interm Execute remap_mod_jar Remap a Fabric mod JAR from intermediary mappings to human-readable mappings. Useful for reading mod source co

WRITE 2 tools

Write index_minecraft_version Create a full-text search index for decompiled Minecraft source. Enables fast searching with search_indexed to Write index_mod Create a full-text search index for decompiled mod source code. Enables fast searching with search_mod_indexed

READ 15 tools

Read analyze_mixin Analyze and validate Mixin code against Minecraft source. Parses @Mixin annotations, validates injection targe Read analyze_mod_jar Analyze a third-party mod JAR file to extract metadata, dependencies, entry points, mixins, and class informat Read compare_versions Compare two Minecraft versions to find differences in classes or registry data. Useful for tracking breaking c Read compare_versions_detailed Compare two Minecraft versions with detailed AST-level analysis. Shows method signature changes, field changes Read find_mapping Look up a symbol (class, method, or field) mapping between different mapping systems. Translates between offic Read get_documentation Get documentation for a Minecraft class or concept. Links to Fabric Wiki, Minecraft Wiki, and provides usage h Read get_minecraft_source Get decompiled source code for a specific Minecraft class. This will automatically download, remap, and decomp Read get_registry_data Get Minecraft registry data (blocks, items, entities, etc.). This runs the data generator if not cached. Read list_minecraft_versions List available and cached Minecraft versions. Shows which versions are available for download and which are al Read search_documentation Search for documentation across all known Minecraft/Fabric topics. Read search_indexed Fast full-text search using pre-built index. Much faster than search_minecraft_code for large queries. Require Read search_minecraft_code Search for classes, methods, fields, or content in decompiled Minecraft source code. Supports regex patterns. Read search_mod_code Search for classes, methods, fields, or content in decompiled mod source code. Supports regex patterns. Use af Read search_mod_indexed Fast full-text search using pre-built mod index. Much faster than search_mod_code for large queries. Requires Read validate_access_widener Parse and validate Fabric Access Widener files against Minecraft source. Checks that targets exist and suggest

EXPLORE

Related servers

Other MCP servers with similar tools — same risk classification, starter policies for each.

FAQ

Questions about Minecraft Dev MCP

How do I prevent bulk modifications through Minecraft Dev MCP? +

The Minecraft Dev MCP server has 2 write tools including index_minecraft_version, index_mod. Set a rate limit in your policy -- for example, 10 calls per hour prevents an agent from making more than 10 modifications per hour. PolicyLayer enforces this at the gateway, before calls reach Minecraft Dev MCP.

How many tools does the Minecraft Dev MCP server expose? +

20 tools across 3 categories: Destructive, Read, Write. 15 are read-only. 5 can modify, create, or delete data.

How do I enforce a policy on Minecraft Dev MCP? +

Register the Minecraft Dev MCP server in PolicyLayer, apply the suggested rules above (adjust the limits to your use case), and point your AI client at the PolicyLayer proxy URL instead of the server directly. Your agents keep the same tools; PolicyLayer evaluates every call against policy before it executes. Nothing to install, live in minutes.

Enforce policy on every Minecraft Dev MCP tool call.

Deterministic rules across all 20 Minecraft Dev MCP tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.

ENFORCE POLICY ON MINECRAFT DEV →

Free to start. No card required.

20 Minecraft Dev MCP tools catalogued and risk-classified — across an index of 43,000+ MCP servers.