GameMaker MCP Pro

AI-powered runtime debugging, testing, and inspection for GameMaker — 250+ tools across 40 categories.

Connect AI assistants (Claude Code, Cursor, VS Code Copilot) directly to your running GameMaker game. The AI can see your screen, move your player, read every variable, and run automated tests — all in real time.

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What Can It Do?

Watch the demo: an AI autonomously playtests a dungeon crawler — navigating the map, testing combat, verifying damage formulas, and generating a full test report. All without human intervention.

250+ Tools in 40 Categories

Category	Description
Runtime Inspection	View all instances, variables, layers, room state
Screenshot Capture	AI sees your game screen, GUI, surfaces
Input Simulation	Keyboard, mouse, gamepad — automated playtesting
Variable Manipulation	Read/write any instance or global variable live
Game Control	Pause, resume, step frame, change game speed
Performance Profiling	FPS, memory, draw calls, step timing
GML Documentation	699 functions, 294 constants, 21 language concepts
+ 13 more	Audio, particles, physics, cameras, tilemaps…

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How It Works

AI Client (Claude Code / Cursor / VS Code)
  ↓ MCP Protocol (stdio)
Node.js MCP Server (TypeScript)
  ↓ TCP Socket / JSON-RPC
GameMaker GML Extension (in your game)

• No DLLs — uses GameMaker's built-in network_* functions
• Debug-only — automatically disabled in Release builds (zero overhead)
• Drop-in setup — copy the extension, add one object, configure your AI client

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Requirements

• GameMaker 2024.2+
• Node.js 18+
• An MCP-compatible AI client (Claude Code, Cursor, VS Code Copilot, etc.)

What's Included

• Node.js MCP Server (TypeScript source)
• GameMaker GML Extension (all scripts + obj_mcp_server)
• Setup guide (INSTALL.md)
• Full documentation

Support

Join the Discord for help, feedback, and updates: https://discord.gg/Dp7XvrRJ