Atlas / MCP servers / amenti-labs / VibeCraft

VibeCraftBLOCK

mcp/amenti-labs/vibecraft

AI-driven vibe based Minecraft building via MCP. Describe a build, watch your agent construct it in Minecraft.

Verdict
BLOCK
Grade
F
Trust score
57 /100
Exposed tools
45 45r · 0w · 0d
Transport
stdio
License
MIT
Stars
101
01

Overview

From the repository's own README, as read at the audited commit. Badges and raw HTML are left out.

AI-Powered Minecraft Building — Build structures through natural-language conversations with Claude.

[](LICENSE) [](https://www.python.org/downloads/) [](https://www.minecraft.net/) [](https://discord.gg/uJ8DQBgcHF)

How It Works

┌─────────────┐     MCP      ┌─────────────┐   WebSocket   ┌─────────────┐
│   Claude    │◄────────────►│  VibeCraft  │◄─────────────►│  Minecraft  │
│  (AI Chat)  │   Protocol   │ MCP Server  │    Bridge     │ Client Mod  │
└─────────────┘              └─────────────┘               └─────────────┘
│
▼
┌─────────────┐
│  Minecraft  │
│   Server    │
└─────────────┘
  1. You chat with Claude asking it to build something
  2. Claude sends commands to the VibeCraft MCP server
  3. The server forwards commands to the Fabric client mod via WebSocket
  4. The client mod executes commands in Minecraft as your player

Works with any Minecraft server — vanilla, Paper, Spigot, or modded. WorldEdit optional.

Quick Start

Prerequisites

  • Python 3.10+ with uv package manager
  • Java 21 (for Minecraft 1.21.x) or Java 17 (for 1.20.x)
  • jq for build script: brew install jq
  • Minecraft Java Edition with a launcher like [Prism](h
Read from source at commit c397d9245345OBSERVED · 2026-10-07
02

Connect

Built from this server's own package name, version and transport as found in its source — not copied from anyone's documentation, so it cannot drift against a page we do not control. Replace the environment placeholders with a token scoped to the least it needs.

claude-code
claude mcp add vibecraft-mcp --env RCON_PASSWORD=${RCON_PASSWORD} -- uvx vibecraft-mcp
claude-desktop
{
  "mcpServers": {
    "vibecraft-mcp": {
      "command": "uvx",
      "args": [
        "vibecraft-mcp"
      ],
      "env": {
        "RCON_PASSWORD": "${RCON_PASSWORD}"
      }
    }
  }
}
03

Exposed tools (45)

45 read · 0 write · 0 destructive.

ToolRiskDescription
analyze_paletteread
analyze_palette_regionread
buildread
build_schematicread
building_pattern_lookupread
building_templateread
calculate_shaperead
capture_screenshotread
furniture_lookupread
generate_terrainread
get_heightmapread
get_nearby_entitiesread
get_player_contextread
get_player_positionread
get_server_inforead
get_surface_levelread
place_building_patternread
place_furnitureread
scan_regionread
search_minecraft_itemread
smooth_terrainread
spatial_awareness_scanread
terrain_pattern_lookupread
texture_terrainread
validate_maskread
worldedit_analysisread
worldedit_biomeread
worldedit_brushread
worldedit_chunkread
worldedit_clipboardread
worldedit_deformread
worldedit_generalread
worldedit_generationread
worldedit_historyread
worldedit_navigationread
worldedit_referenceread
worldedit_regionread
worldedit_schematicread
worldedit_scriptingread
worldedit_selectionread
worldedit_snapshotread
worldedit_terrain_advancedread
worldedit_toolsread
worldedit_utilityread
worldedit_vegetationread
04

Trust audit

BLOCKgrade F · trust 57/100 Do not install this without reading the findings. The audit found something that could harm you or your machine.

LayerWhat it checksResult
L0Provenance & inventoryWARN
L1Static analysis of the codeFAIL
L2Instruction surface (what it tells the agent)PASS
L3Class-specific surfacePASS
L4Behavioural (sandbox)SKIPPED

What the source does

Filesystem
declared (1 observation(s))
Network
declared (6 observation(s))
Shell
declared (5 observation(s))
Dependencies
pinned
Secrets in source
none-found

Findings (15)

HIGHCode injection · code.eval_exec · CWE-78, CWE-94, CWE-95
mcp-server/src/vibecraft/code_sandbox.py:228
"eval(",
Why it matters. evaluates text as code
Fix. remove; use a parser or a dispatch table
HIGHCode injection · code.eval_exec · CWE-78, CWE-94, CWE-95
mcp-server/src/vibecraft/code_sandbox.py:229
"exec(",
Why it matters. evaluates text as code
Fix. remove; use a parser or a dispatch table
HIGHCode injection · code.eval_exec · CWE-78, CWE-94, CWE-95
mcp-server/src/vibecraft/code_sandbox.py:499
exec(code, safe_namespace)
Why it matters. evaluates text as code
Fix. remove; use a parser or a dispatch table
HIGHCode injection · code.eval_exec · CWE-78, CWE-94, CWE-95
mcp-server/src/vibecraft/code_sandbox.py:617
("eval() call", "commands = []\neval('1+1')"),
Why it matters. evaluates text as code
Fix. remove; use a parser or a dispatch table
HIGHCode injection · code.eval_exec · CWE-78, CWE-94, CWE-95
mcp-server/src/vibecraft/code_sandbox.py:618
("exec() call", "commands = []\nexec('pass')"),
Why it matters. evaluates text as code
Fix. remove; use a parser or a dispatch table
MEDIUMInventory / provenance · inv.binary · CWE-1104
client-mod/gradle/wrapper/gradle-wrapper.jar
gradle-wrapper.jar
Why it matters. a compiled or binary member cannot be reviewed from source
Fix. ship source, or explain the binary in the README
MEDIUMInventory / provenance · inv.binary · CWE-1104
minecraft-server/plugins/WorldEdit/schematics/modern_villa_1.schem
modern_villa_1.schem
Why it matters. a compiled or binary member cannot be reviewed from source
Fix. ship source, or explain the binary in the README
MEDIUMInventory / provenance · inv.binary · CWE-1104
minecraft-server/plugins/WorldEdit/schematics/modern_villa_2.schem
modern_villa_2.schem
Why it matters. a compiled or binary member cannot be reviewed from source
Fix. ship source, or explain the binary in the README
MEDIUMFilesystem / path · fs.system_paths · CWE-22, CWE-59
mcp-server/src/vibecraft/code_sandbox.py:619
("open() call", "commands = []\nopen('/etc/passwd')"),
MEDIUMNetwork egress · net.beacon_words · CWE-200, CWE-319
mcp-server/src/vibecraft/constants.py:368
"beacon",
LOWNetwork egress · net.raw_ip · CWE-200, CWE-319
README.md:105
"url": "http://127.0.0.1:8765/sse"
LOWNetwork egress · net.raw_ip · CWE-200, CWE-319
docs/SETUP_GUIDE.md:146
"url": "http://127.0.0.1:8765/sse"
LOWNetwork egress · net.raw_ip · CWE-200, CWE-319
mcp-server/README.md:28
Configure your AI client to connect to `http://127.0.0.1:8765/sse`
LOWNetwork egress · net.raw_ip · CWE-200, CWE-319
mcp-server/scripts/test_sse_tools.py:13
url = "http://127.0.0.1:8765/sse"
LOWNetwork egress · net.raw_ip · CWE-200, CWE-319
mcp-server/scripts/test_sse_tools.py:42
post_url = f"http://127.0.0.1:8765/messages/?session_id={session_id}"

Gates applied: no_behavioural_pass.

Audited 2026-10-07 · audit v0.4.1 · source sha c397d9245345full audit observations/trust-audit/mcp-server/amenti-labs__vibecraft.json · Report an issue / request a re-scan
05

Audit history

Every audit this server has had. A grade with a past is a grade somebody is still checking.

DateSourceVerdictGradeScoreChange
2026-10-07c397d9245345BLOCKF57first audit
06

Questions

What is the VibeCraft MCP server?

AI-driven vibe based Minecraft building via MCP. Describe a build, watch your agent construct it in Minecraft.

What tools does VibeCraft expose?

45 in total: 45 read-only, 0 that write, and 0 that can delete or overwrite. Every one is listed on this page with its risk.

Is VibeCraft safe to connect to an agent?

No — not without reading the findings first. The audit graded it F (57/100) and found 5 critical or high issues in the source. Each one is listed on this page with the file and line it is on.

What credentials does VibeCraft need?

It reads RCON_PASSWORD from the environment. Give it a token scoped to the least it needs — an agent that can be talked into calling a tool can be talked into calling it with your credentials.

How does VibeCraft run?

It speaks stdio, so it runs as a local process your client starts. It is published on PyPI as vibecraft-mcp.

How current is this page?

The grade is for one exact copy of the source (c397d9245345), read on 2026-10-07. The repository is watched and re-audited when it changes.

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