godot-mcp

Godot MCP

AI-driven Godot 4 control via MCP — scene manipulation, 3D import, GPU particles, procedural textures, HTML5 export. Deterministic playtesting: freeze the game clock, inject analog/joypad/mouse input, step frame-by-step until a condition is met, read live game state as structured JSON. Game Builder: describe a game in natural language and get playable GDScript + export. Publish to itch.io and Steam. 95+ tools, 77 tests, NSIS desktop installer.

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Quick Install

git clone https://github.com/sandraschi/godot-mcp
cd godot-mcp
just bootstrap       # install deps
just serve           # start server (10993)
just web             # open dashboard (10992)

See INSTALL.md for all options (MCPB, dev setup, naked PC).

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Features

• Game Builder — design_game -> generate_game_logic -> generate_game_tests -> generate_dialogue -> export. Validated with gdlint + godot --check-only, auto-repaired by LLM. Tutorial
• Procedural textures — godot_generate_procedural_texture: gradient, noise, checker, solid. No external assets needed.
• Deterministic playtesting — freeze game clock, step frame-by-step, step-until GDScript condition, analog/joypad/mouse/text input injection. Three-phase implementation inspired by satelliteoflove/godot-mcp.
• Structured game state — godot_state_digest reads live node state as JSON via _mcp_state() convention or auto-collected properties. Cheaper than full scene tree dump.
• Engine control — 30 bridge tools: import STL/GLB/OBJ, particles, cameras, lighting, animation, viewport capture, input simulation, scene node management.
• Animation keyframe editor — query tracks down to individual keyframes, insert/remove keys, set interpolation.
• TileMap/GridMap editing — read and write cell data directly (bypasses base64 .tscn serialization).
• Performance profiler — 14 engine metrics with auto-sampling and spike detection (>2 stddev).
• Mesh validation — scan for NaN vertices, degenerate triangles, zero normals.
• 3D Gaussian Splat import — import .ply and .spz files with a custom billboarded Gaussian shader (per-splat scale, SH DC color).
• Publishing — itch_ops and steam_ops portmanteaus for itch.io Butler and SteamPipe. Cross-repo fleet pipeline.
• GDScript validation — two-pass (gdlint style + godot compile) with LLM repair.
• Plugin ecosystem — 7 community plugins installable from the /plugins page.
• LLM detection — auto GPU probe, model recommendation by VRAM tier. Default gemma4:12b.
• Sample game — Vibecoder Runner with 10 AI-themed enemy types.

What You Can Do

just gb-demo "A 2D runner where you collect stars and avoid spikes"
just bridge-test                          # check engine connection
just demo-run vibecode                    # play sample game
just gb-preview                           # preview latest HTML5 export

Documentation

Doc	Contents
Installation	All install methods
Configuration	Env vars, settings
Tool Reference	All 90+ MCP tools
Playtesting Spec	Deterministic playtesting architecture
Demo Scripts	Playtesting, profiling, scene inspection, splat import demos
Game Builder Tutorial	Prompt-to-game walkthrough
Godot Ecosystem	Plugins, gdtoolkit, fleet pipeline
Troubleshooting	Common issues
API Reference	REST endpoints
Development	Contributing, local setup

Requirements

• Godot 4.4+ (for engine bridge tools) — just install-godot or godotengine.org
• Python 3.13+ + uv — winget install astral-sh.uv
• Bun — winget install oven-sh.bun
• Ollama (optional, for game builder) — winget install Ollama.Ollama then ollama pull gemma4:12b
• Rust (optional, for NSIS build) — rustup.rs

License

MIT — see LICENSE.