godot-forge

Godot Forge

The MCP server for Godot 4. Test runner, API docs, script analysis, and more.

AI coding assistants are structurally bad at GDScript. Models trained on data skewed towards Godot 3 hallucinate deprecated APIs (yield instead of await, KinematicBody instead of CharacterBody3D, export var instead of @export var). Godot Forge fixes this.

8 tools. Zero config. Works with every MCP-compatible IDE.

Install

npx -y godot-forge

That's it. Godot Forge auto-detects your Godot binary (Steam, Homebrew, direct download) and finds your project.godot automatically.

Add to your IDE

Claude Code

claude mcp add godot-forge -- npx -y godot-forge

Cursor

Add to .cursor/mcp.json:

{
  "mcpServers": {
    "godot-forge": {
      "command": "npx",
      "args": ["-y", "godot-forge"]
    }
  }
}

VS Code (Copilot)

Add to .vscode/mcp.json:

{
  "servers": {
    "godot-forge": {
      "command": "npx",
      "args": ["-y", "godot-forge"]
    }
  }
}

Windsurf

Add to ~/.codeium/windsurf/mcp_config.json:

{
  "mcpServers": {
    "godot-forge": {
      "command": "npx",
      "args": ["-y", "godot-forge"]
    }
  }
}

Zed

Add to settings.json:

{
  "context_servers": {
    "godot-forge": {
      "command": {
        "path": "npx",
        "args": ["-y", "godot-forge"]
      }
    }
  }
}

Claude Desktop

Add to ~/Library/Application Support/Claude/claude_desktop_config.json (macOS) or %APPDATA%/Claude/claude_desktop_config.json (Windows):

{
  "mcpServers": {
    "godot-forge": {
      "command": "npx",
      "args": ["-y", "godot-forge"]
    }
  }
}

More IDEs (Codex, Gemini CLI, JetBrains, Continue, Cline, Roo Code, Neovim, OpenCode, Kiro)

See IDE Setup Guide for configuration snippets for all supported IDEs.

Tools

Tool	Description	Needs Godot	Needs Editor
godot_run_tests	Run GUT/GdUnit4 tests, get structured pass/fail results	Yes	No
godot_search_docs	Search Godot 4 API docs with 3→4 migration mapping	No	No
godot_analyze_script	Detect 10 GDScript pitfalls (deprecated API, coupling, re-entrancy)	No	No
godot_analyze_scene	Parse .tscn/.tres, detect antipatterns and format errors	No	No
godot_get_project_info	Project structure overview with progressive disclosure	No	No
godot_get_diagnostics	LSP diagnostics from Godot's language server	No	Yes
godot_run_project	Launch/stop project, capture debug output	Yes	No
godot_screenshot	Capture viewport screenshot as base64 PNG	Yes	No

[!TIP] 6 of 8 tools work without Godot installed. Only test running, project launching, and screenshots need the binary.

Features

Test Runner

Auto-detects GUT and GdUnit4. Returns structured JSON with pass/fail counts, failure details with file paths and line numbers. Supports filtering by script, method, or inner class.

Ask your AI: "Run the water profile tests"
→ { total: 5, passed: 5, failed: 0, duration_ms: 462 }

Godot 3→4 Migration Mapping

The #1 reason AI writes broken GDScript. When your AI queries a deprecated API, it gets the correct Godot 4 equivalent instantly (30+ mappings covering classes, methods, syntax, and constants).

Query: "KinematicBody"  →  "Renamed to CharacterBody3D in Godot 4"
Query: "yield"          →  "yield(obj, 'signal') → await obj.signal"
Query: "instance()"     →  "instance() → instantiate()"

Script Analysis: 10 Pitfalls

Every pitfall detected from real game development:

#	Pitfall	What It Catches
1	Godot 3→4 API	yield, connect("signal"), export var, instance()
2	Giant scripts	Over 300 lines. Should be split
3	:= on Variant	Type inference on Dictionary.get() causes parse errors
4	Tight coupling	Excessive get_node("../../...") references
5	Signal re-entrancy	Signal emitted between state changes
6	Autoload misuse	Too many autoloads, static func on autoloads
7	Missing disconnect	connect() without _exit_tree() cleanup
8	_init() timing	Node tree access before node is in tree
9	Python-isms	List comprehensions, len(), Python imports
10	.tres type field	Custom class name instead of type="Resource"

Scene Analysis

Parses .tscn and .tres files. Detects deep nesting (>8 levels), oversized scenes (>100 nodes), missing script references, preload() in .tres, integer resource IDs, and more.

LSP Diagnostics

Connects to Godot's built-in language server (runs automatically when the editor is open). Returns real compiler errors and warnings (no guesswork).

[!NOTE] Requires the Godot editor to be running with your project open. All other tools work without the editor.

Screenshot Capture

Captures the game viewport as a PNG image. Loads the project's main scene (or a specified scene), waits for rendering, and returns the screenshot as base64 for the AI to see.

Configuration

Godot Binary

Auto-detected in this order:

• GODOT_PATH environment variable
• godot / godot4 in PATH
• Steam installation (macOS, Windows, Linux)
• Platform defaults (/Applications/Godot.app, Homebrew, Scoop, Flatpak, Snap, etc.)

Override manually:

export GODOT_PATH="/path/to/godot"

See Godot Detection for the full list of searched paths.

Project Directory

Auto-detected by walking up from the current directory to find project.godot. Override:

npx godot-forge --project /path/to/godot/project

Requirements

• Node.js 18+: for npx execution
• Godot 4.x: auto-detected (optional for 6 of 8 tools)
• Any MCP-compatible IDE: Claude Code, Cursor, VS Code, Windsurf, Zed, and more

Design Principles

• Outcomes, not operations: Each tool delivers a complete result, not raw API wrapping
• 8 curated tools: No 93-tool context bloat (why this matters)
• Progressive disclosure: Summaries first, details on demand
• spawn() not exec(): No command injection, no Windows quoting bugs
• Actionable errors: Every error includes a suggestion the AI can act on
• Cross-platform: macOS, Windows, Linux. Steam and non-Steam installs.

Contributing

Contributions are welcome! See CONTRIBUTING.md for guidelines.

• Bug reports: Open an issue
• Feature requests: Start a discussion
• Pull requests: Fork, branch, test, PR

Development

git clone https://github.com/gregario/godot-forge.git
cd godot-forge
npm install
npm run build
npm test        # 74 tests across 12 test files

Running locally

# Point your IDE at the local build
claude mcp add godot-forge-dev -- node /path/to/godot-forge/dist/index.js

Roadmap

See ROADMAP.md for planned features.

Phase 2: Input simulation, runtime scene tree inspection, performance profiling, shader validation, export/CI pipeline.

Licence

MIT