What is blender-mcp AGENTS.md?

Repository instructions for Blender MCP, a service that lets an AI assistant control Blender through a network connection. Blender is software for creating 3D models, scenes, and animations.

Use them when modifying, testing, or reviewing the Blender MCP server or its Blender add-on.

They show an agent where the server, Blender add-on, tools, security checks, and version compatibility code belong.

How ageless-h/blender-mcp configures Codex and OpenCode

Reuse

Borrowing it

Nothing to install: this file belongs to ageless-h/blender-mcp. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/ageless-h/blender-mcp/master/AGENTS.md

Clone the repo

git clone --depth 1 https://github.com/ageless-h/blender-mcp

Made for: Codex, OpenCode.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/instructions/ageless-h/blender-mcp/agents-md.svg)](https://agentmods.dev/instructions/ageless-h/blender-mcp/agents-md)

Your own site

<a href="https://agentmods.dev/instructions/ageless-h/blender-mcp/agents-md"><img src="https://agentmods.dev/badge/instructions/ageless-h/blender-mcp/agents-md.svg" alt="Measured on agentmods" height="20"></a>

Per session 1,827 This file is loaded in full into every session.

When invoked 1,827 The same file — it is already loaded in full.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5.1	$0.01827	$0.01827
Opus 5	$0.00914	$0.00914
Sonnet 5	$0.00365	$0.00365
Haiku 4.5	$0.00183	$0.00183

Measured 8d ago against content hash c27be9878e11, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade A, and why

blender-mcp AGENTS.md scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 8d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

AGENTS.md · 132 lines

How it starts

The opening of the file, as written. The whole thing — 132 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AGENTS

OVERVIEW

Blender MCP — MCP server for AI-assisted Blender automation. Python >=3.11, zero runtime deps. Two-process architecture: MCP server (PyPI ageless-blender-mcp) talks to Blender addon over TCP.

LLM Client ←MCP JSON-RPC→ blender_mcp (server) ←TCP socket→ blender_mcp_addon (Blender)

105 Python files, ~17,500 lines
29 tools, 0 prompts (tools-only server), 37 registered handlers (across 29 files)
Blender: 4.2 LTS / 4.5 LTS / 5.0+ / 5.1

STRUCTURE

src/
  blender_mcp/              # MCP server (PyPI) — see src/blender_mcp/AGENTS.md
    mcp_protocol.py         # MCPServer: entry, 29 tools, JSON-RPC dispatch
    schemas/tools.py        # Tool schemas (WHAT/WHEN/NOT + annotations)
    adapters/               # SocketAdapter (TCP) + MockAdapter (testing)
    catalog/                # CapabilityCatalog — version-scoped registration
    security/               # Allowlist, Guardrails, RateLimiter, AuditLogger
    prompts/registry.py     # Empty prompt registry (prompts removed)
    versioning/             # Blender version compat checks
    telemetry.py            # Usage telemetry
  blender_mcp_addon/        # Blender addon (runs inside Blender)
    __init__.py             # bl_info registration
    capabilities/base.py    # 29-tool dispatcher + _push_undo_step()
    handlers/               # See src/blender_mcp_addon/handlers/AGENTS.md
      registry.py           # @HandlerRegistry.register decorator
      types.py              # DataType enum + DATA_TYPE_TO_COLLECTION
      response.py           # _ok(), _error(), not_found_error()
      base.py               # BaseHandler + GenericCollectionHandler (shared CRUD)
      shared.py             # create_mesh_primitive, link_data_to_scene
      data/                 # 30 files — one per bpy data type
      nodes/ animation/ sequencer/ constraints/ physics/ uv/ scene/
      importexport/ info/ operator/ script/
    server/                 # Socket server (op_log, timeouts)
    operators.py preferences.py ui.py
tests/                      # See tests/AGENTS.md
  conftest.py               # src/ on sys.path, MCP_ADAPTER=mock fixture
  addon/ tools/ integration/ mcp/
docs/                       # capabilities/, testing/, clients/, architecture/
scripts/                    # Build/release helpers + CI scripts (check_compatibility, ci_install_blender, ci_run_blender_tests, validate_boundary)
examples/                   # stdio_loop.py

Read the full file on GitHub · 132 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

8d ago First seen · 132 lines · 1,827 tokens per session scan A c27be9878e11

Subscribe to this mod's changes

blender-mcp AGENTS.md is an instructions file published in the GitHub repository ageless-h/blender-mcp (5 stars, last pushed 4mo ago), licensed MIT. It adds 1,827 tokens to every session, about $0.0091 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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