Skills/PyPI/mcp-for-blender

mcp-for-blender@2.2.7

VERIFIED· not started

Publisher claims: "Open source Blender integration through the Model Context Protocol (not affiliated with Blender Foundation)" Observed in sandbox: no network, touches nothing outside the project, writes no memory.

Registry PyPI (MCP server)Publisher ahujasid · publishing for 616 daysInstalls 1.3MLast detonated 6d ago
$claude mcp add mcp-for-blender -- uvx mcp-for-blender
WatchReport an issue

Coverage

Not started: dependency install failed; the server itself was not observed.
Tested
the dependency install step · every file read, file written and host contacted by what ran
Not tested
server startup · the tool list · tool behavior

What this means for the label: Verified here covers what ran. The server's tools were not exercised with a real credential, so nothing about their behavior is asserted; the credential summary below says what to do with that.

Before you give it your token

It will ask for
BLENDERMCP_PREMIUM_LICENSE_KEYConfiguration, not credentials: BLENDER_HOST, BLENDER_PORT, BLENDER_USER_ADDONS, BLENDERMCP_ADDONS_DIR, BLENDERMCP_PREMIUM_API_URL
Where it talks to
mcp-for-blender.com (its own)Also polyhaven.com, supabase.co, discord.gg, meshy.ai, poly.pizza, developers.tripo, openapi.tripo, deemos.com, fal.run, sketchfab.com, hyper3d.ai, fal.ai, tencent.com, githubusercontent.com, opencode.ai, astral.sh — not the publisher's domain; check what for before connecting.
What the honeypot saw
no credential files read · no network
What we could not test
server startup · the tool list · tool behavior

Connect it with a scoped credential, under the guard, and read the third-party hosts first. The code names polyhaven.com, supabase.co, discord.gg, meshy.ai, poly.pizza, developers.tripo, openapi.tripo, deemos.com, fal.run, sketchfab.com, hyper3d.ai, fal.ai, tencent.com, githubusercontent.com, opencode.ai, astral.sh as well as its own vendor. The guard injects BLENDERMCP_PREMIUM_LICENSE_KEY only into requests to mcp-for-blender.com (and its subdomains) and refuses the rest.

$vet-skills run --secrets BLENDERMCP_PREMIUM_LICENSE_KEY=mcp-for-blender.com -- uvx mcp-for-blender

Never paste a credential into a chat, a ticket or a report, including ours. How the guard holds it.

Is [email protected] safe to install?

KillerSkills ran it in the KillerSkills honeypot sandbox (2 scenarios; not started: dependency install failed; the server itself was not observed) on 2026-11-08 and scored it 83/100 (Verified). In what ran, nothing we could detect went wrong: no undeclared network egress, no credential reads, no persistent instruction writes. What it does with a real credential was not observed; the static findings and the publisher carry the rest of the score. Summary: no network, touches nothing outside the project, writes no memory.

Behavior trace

Honeypot run · 0 s · 2 scenarios · 0 deviations
t+CategoryObserved action
0.0sprocessno install scripts in bundle
0.2sprocessdependency install exit 1 ·
0.2sclaimednot started: dependency install failed (exit 1); the server itself was not observed
0.2sprocessscript backend runs setup only
0.2sprocessno install scripts to re-run

Static findings

HIGH
Direct script execution from GitHub raw URLaddon.py:6827 · Direct script execution from GitHub raw URL — unverified code sourceADDON_UPDATE_URL = "https://raw.githubusercontent.com/ahujasid/blender-mcp/main/addon.py"Fix: Pin versions and sources; vendor anything fetched at install time.
AST06
MEDIUM
Python subprocess execution detectedsrc/blender_mcp/update_cli.py:71 · Python subprocess execution detectedproc = subprocess.run([uv, "tool", "list"], capture_output=True, text=True, errors="replace", timeout=30)Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
MEDIUM
Python subprocess execution detectedsrc/blender_mcp/setup_cli.py:671 · Python subprocess execution detectedproc = subprocess.run(["pgrep", "-xi", "blender"], capture_output=True, text=True, timeout=15)Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
MEDIUM
Python subprocess execution detectedsrc/blender_mcp/setup_cli.py:647 · Python subprocess execution detectedproc = subprocess.run([executable, "--version"], capture_output=True, text=True, errors="replace", timeout=60)Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
MEDIUM
Python subprocess execution detectedsrc/blender_mcp/setup_cli.py:668 · Python subprocess execution detectedproc = subprocess.run(["tasklist", "/FI", "IMAGENAME eq blender.exe", "/NH"],Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
LOW
Collapsed <details> block carrying instructionsREADME.md:238 · Collapsed <details> block carrying instructions · informational: not an instruction file<summary><b>Installing uv, per platform</b></summary> **macOS** ```bash brew install uv ``` **Windows** ```powershell winget install --id=astral-sh.uv -e ``` ThFix: Remove the text that addresses the agent rather than the reader; describe behavior, do not instruct.
AST01
HIGH
Direct script execution from GitHub raw URLsrc/blender_mcp/bundled/addon.py:6827 · Direct script execution from GitHub raw URL — unverified code sourceADDON_UPDATE_URL = "https://raw.githubusercontent.com/ahujasid/blender-mcp/main/addon.py"Fix: Pin versions and sources; vendor anything fetched at install time.
AST06
MEDIUM
Python subprocess execution detectedsrc/blender_mcp/update_cli.py:84 · Python subprocess execution detectedproc = subprocess.run([uv, "tool", "upgrade", PACKAGE])Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
MEDIUM
Python subprocess execution detectedsrc/blender_mcp/setup_cli.py:702 · Python subprocess execution detectedproc = subprocess.run(Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
LOW
Collapsed <details> block carrying instructionsREADME.md:71 · Collapsed <details> block carrying instructions · informational: not an instruction file<summary><b>Manual setup, in case the automatic setup doesn't work</b></summary> Three steps: install `uv`, point your MCP client at the server, install the BleFix: Remove the text that addresses the agent rather than the reader; describe behavior, do not instruct.
AST01
MEDIUM
Python subprocess execution detectedsrc/blender_mcp/setup_cli.py:497 · Python subprocess execution detectedproc = subprocess.run(args, capture_output=True, text=True, errors="replace", timeout=60)Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
MEDIUM
Python subprocess execution detectedtests/test_compat_matrix.py:60 · Python subprocess execution detectedreturn subprocess.run(["git", "show", f"{ref}:addon.py"], cwd=ROOT, capture_output=True,Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
MEDIUM
Access to sensitive file pathstests/test_safe_mode.py:157 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system files"open_builtin": "data = open('/etc/passwd').read()\nprint(data)",Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
MEDIUM
MCP server using network transport (SSE/HTTP)tests/test_tripo.py:382 · MCP server using network transport (SSE/HTTP) — data sent over networkresult = addon.BlenderMCPServer().import_generated_asset_tripo(name="Teapot", model_url="/tmp/model.glb")Fix: Namespace tool names and keep tool descriptions literal; no instructions to the agent inside them.
AST04
MEDIUM
Python subprocess execution detectedsrc/blender_mcp/update_cli.py:94 · Python subprocess execution detectedproc = subprocess.run(command, env={**os.environ, REEXEC_ENV: current})Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
MEDIUM
MCP server using network transport (SSE/HTTP)tests/test_tripo.py:220 · MCP server using network transport (SSE/HTTP) — data sent over networkresult = addon.BlenderMCPServer().create_tripo_job(image="https://example.com/teapot.png")Fix: Namespace tool names and keep tool descriptions literal; no instructions to the agent inside them.
AST04
MEDIUM
Access to sensitive file pathstests/test_polyhaven.py:1707 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system filesresult = srv.get_polyhaven_asset_preview("../../etc/passwd")Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
MEDIUM
MCP server using network transport (SSE/HTTP)tests/test_meshy.py:512 · MCP server using network transport (SSE/HTTP) — data sent over networkresult = addon.BlenderMCPServer().import_generated_asset_meshy(name="Teapot", model_url="/tmp/model.glb")Fix: Namespace tool names and keep tool descriptions literal; no instructions to the agent inside them.
AST04

Cost to the agent

Instructions loaded
≈65 tok
1 file · 68 in bundle
Tool list per prompt
≈0 tok
0 tools · 0 per tool
Handshake
no reply
launch to tools/list, stdio
Undocumented tools
0
description under 20 chars · avg 0

Tokens estimated at four characters each. The tool list is re-read by the agent on every turn, so it is the number to compare between servers that do the same job: ranked across the index.

Known vulnerabilities

No advisories in OSV for mcp-for-blender@2.2.7 as of 7d ago. This is the package itself, not its dependencies.