Roblox MCP - MCP Server for Roblox Studio | AI Game Development with Claude, Codex, Cursor & Gemini

WEPPY is an MCP server that lets AI coding agents control a live Roblox Studio session - create and edit scripts, instances, terrain, lighting, assets, audio, and animations through natural language.

Action-based tool surface · Bidirectional sync · Automated playtest · UI Studio · Multi-place support

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Why WEPPY (Weppy Roblox MCP)?

AI coding agents like Claude, Codex, and Gemini are powerful, but they cannot see or modify anything inside Roblox Studio. The DataModel, scripts, terrain, and lighting are invisible to external tools. Without a bridge, AI can only generate code snippets that you must paste manually.

WEPPY bridges AI agents and Roblox Studio. AI directly creates and modifies instances, scripts, properties, terrain, and more inside Studio, and the changes are reflected immediately in Studio and the dashboard so you can see exactly what changed.

No copy-pasting code. AI does the work, you review the results.

Quick Install

Install with the guided web page.

👉 Install Page

Terminal One-Line Install

If you're comfortable with the terminal, install everything in one line.

macOS / Linux

curl -fsSL https://raw.githubusercontent.com/hope1026/weppy-roblox-mcp/main/install.sh | bash

Windows (PowerShell)

irm https://raw.githubusercontent.com/hope1026/weppy-roblox-mcp/main/install.ps1 | iex

Then reopen your AI app and restart Roblox Studio.

Automatic MCP registration supports Claude Code, Claude Desktop, Cursor, Codex CLI/App, Gemini CLI, and Antigravity.

Manual Install

If the one-line install does not work, or automatic installation is not available in your environment:

Step 1 - Use the web install page for the Roblox Studio plugin and app-specific setup.

👉 Web Install Docs

Step 2 - Register the MCP server with your AI app:

npx -y @weppy/roblox-mcp

Supported AI apps are Claude Code, Claude Desktop, Cursor, Codex CLI, Codex App, Gemini CLI, and Antigravity.

Any MCP-compatible AI client works. The server command is npx -y @weppy/roblox-mcp.

Compatibility

| Claude Code | Claude Desktop | Cursor | Codex CLI | Gemini CLI | Antigravity | |:-----------:|:--------------:|:------:|:---------:|:----------:|:-----------:| | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ |

Requirements: Node.js 18+, Roblox Studio, Windows 10+ or macOS 12+

What It Does

1) MCP Tools: Direct execution in Studio from natural language

AI can directly handle scripts, instances, properties, terrain, lighting, assets, audio, and animation inside Studio.

• "Add particles + sound + cooldown when the player jumps."
• "Build a boss arena at map center and place collision-safe spawn points."
• "Change this module interface and update every dependent script."
• "Generate terrain with mountains and rivers, then place spawn points on flat areas."
• "Search the Creator Store for a sword model and insert it into StarterPack."

2) Sync: Keep full project context stable for AI

AI works from a synchronized local mirror, so multi-file updates stay consistent.

• Basic: one-way sync (Studio -> Local)
• Pro: bidirectional sync + per-type Direction/Apply Mode + history + multi-place

3) Playtest: Let AI run and verify tests automatically

AI can control Roblox Studio playtests directly. It can start and stop Play (F5) or Run (F8), inject test scripts, collect logs, and generate local reports automatically.

• "Start a Run-mode playtest and check whether the NPC reaches the target."
• "Write a test that verifies the SpawnLocation is above the ground and run it."
• "Validate that the script I just changed runs without errors in playtest."

4) UI Studio: Build and inspect in-game UI

UI Studio lets AI agents create in-game UI that matches your game's style, or analyze the UI you already have and suggest improvements.

• Clarify the UI goal with guided questions about purpose, screen, target devices, and visual direction
• Create or refine game-style menus, HUDs, buttons, labels, image panels, and other Roblox UI elements directly in Studio
• Capture the result, compare before/after changes, and follow dashboard suggestions for layout, readability, touch targets, and safe areas

5) WEPPY Dashboard: Monitor AI work in real time

The MCP server provides a web dashboard where you can check connection status, tool execution history, sync state, UI Studio history, and game change logs in real time.

• Server/Plugin/Agent connection status at a glance
• Compare every change the AI made via Before & After in Changelog
• Analyze workflow with tool execution history, UI Studio captures, and statistics

6) WEPPY Roblox Explorer: Browse Studio hierarchy in VSCode

View the full instance tree of your Roblox Studio place directly inside VSCode. Navigate services, open synced scripts and property files, and track sync status - all without switching to Studio. WEPPY Roblox Explorer is a companion VSCode extension for sync data generated by WEPPY. Tree browsing works from synced files, and live sync state or direction indicators are enhanced when the local MCP server is running. Install from VS Code Marketplace or Open VSX.

• Class icons matching Studio for instant recognition
• Click to open synced scripts and property files
• Multi-place support with sync status indicators

Use Cases

• Rapid prototyping: Describe a game mechanic in natural language and watch AI build it in Studio
• Bulk refactoring: Rename a module interface and update every dependent script in one request
• Terrain & environment: Generate procedural terrain, set lighting/atmosphere, place assets - all from a single prompt
• UI design: Generate in-game UI, capture previews, and iterate on Design Check suggestions
• Multi-file consistency: AI reads the full project via Sync and applies changes across related scripts together
• Asset integration: Search the Creator Store, insert models, and configure properties without leaving your editor

Why It Matters

• Compress repetitive work: turn many manual edits into one request
• Change related files together: not just one target file
• Lower risk: rely on sync state and history before applying changes
• Better token efficiency (Pro): reduce round trips with bulk actions

Docs

Detailed guides and app-specific setup now live on the web.

• Web Docs Hub
• Install Guide
• Pro Upgrade

For app setup details, open the web docs hub and choose the relevant AI client guide.

FAQ

How do I connect Claude Code to Roblox Studio?

Install the Roblox Studio plugin, then register the MCP server (npx -y @weppy/roblox-mcp) in Claude Code. Claude can then directly read and write scripts inside Studio.

How do I use Codex CLI with Roblox Studio?

Install the plugin, then add the MCP server config to Codex CLI.

Does Roblox MCP work with Cursor?

Yes. Any MCP-compatible AI client works.

Can AI build Roblox games with this?

Yes. AI can create instances, write scripts, generate terrain, set up lighting, insert assets, configure physics, and more - all inside a live Roblox Studio session. It goes beyond code generation to executable actions.

What is the difference between Basic and Pro?

Basic (Free) includes MCP tool execution and one-way sync (Studio -> Local). Pro adds bidirectional sync, UI Studio, bulk operations, terrain generation, spatial analysis, audio/animation control, and multi-place support. See the Pro upgrade page.

How is Weppy different from other Roblox MCP servers?

Weppy uses action-based dispatching instead of separate tools for each function. This reduces AI token consumption significantly. It also provides bidirectional project sync and multi-place support, which most alternatives lack.

Is it safe? Can AI break my game?

The server runs on localhost only (127.0.0.1:3002). Forbidden paths (CoreGui, CorePackages) are blocked. Rate limiting (450 req/min) and 30-second timeouts prevent runaway operations. All changes are trackable via sync history.

Pro Upgrade

Bidirectional Sync, UI Studio, advanced build capabilities, and AI token efficiency - all in one upgrade.

Pro Upgrade Guide

License

This repository is licensed under AGPL-3.0.

Commercial licensing is available separately. See COMMERCIAL-LICENSE.md.

Use of the Weppy name and logos is governed by TRADEMARKS.md.

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