Roblox Executor MCP Server

An MCP server that allows Agents to interact with a running Roblox game client — execute code, inspect scripts, spy on remotes, and more.

Dashboard

Roblox Executor MCP includes a local web dashboard at:

http://localhost:16384/

Use it to see connected Roblox clients, inspect scripts, run tools, view server logs, configure semantic search, and index games for semantic script search.

Features

Code Execution — Run Lua code and fetch data from the game client.
Script Inspection — Decompile scripts and search across all sources.
Instance Search — CSS-like selectors and hierarchy trees.
Remote Spy — Intercept, log, block, and ignore Remotes/Bindables via Cobalt.
GUI Interaction — Click buttons and type into text boxes.
Screenshot — Capture Roblox window screenshots (Windows only).
Multi-Client — Connect multiple Roblox clients at once.
Primary / Secondary — Multiple MCP instances auto-coordinate with automatic promotion. Supports remote relaying via --baseurl. See Advanced.

Tutorial

![roblox-executor-mcp installation guide](https://youtube.com/watch?v=Tcy5RNf1TRc)

Prerequisites

Node.js ≥ 18
Bun ≥ 1.3 for the interactive OpenTUI harness installer
A Roblox executor that supports loadstring, request, and (preferably) WebSocket

Quick Start

1. Clone the server

git clone https://github.com/notpoiu/roblox-executor-mcp.git
cd roblox-executor-mcp

2. Run the harness installer

The installer builds the server, lets you choose AI clients, writes supported MCP configs, and prints the Roblox loader script.

npm run install:harnesses

The picker is built with OpenTUI and runs through Bun. npm run install:harnesses installs Bun first if it is not already available. It shows detected local clients by default; if none are detected, it warns you to install a harness first. Press s in the picker or pass --show-all-harnesses to reveal every supported config target. If your terminal has trouble with the interactive picker, use the plain numbered prompt:

npm run install:harnesses -- --plain

The installer can also place the Roblox loader into a detected executor autoexec folder, such as MacSploit on macOS or supported Windows executor autoexec folders. Use the prompt, or run:

npm run getscript -- --autoexec

It can also help with:

cross-machine setup on the same LAN
copying the Roblox loader to your clipboard
optional Ollama embeddinggemma setup for semantic indexing
pulling latest repo changes before install/build

To update an existing install later, run:

npm run update

The update command can stop currently running MCP server processes, optionally pull latest changes, and always rebuilds the server.

Manual setup

If you prefer to configure a client yourself, use the setup guide for your client:

| Client | Guide | | -------------- | ------------------------------------------- | | Cursor | Setup Guide | | Claude Desktop | Setup Guide | | Claude Code | Setup Guide | | Codex CLI | Setup Guide | | Windsurf | Setup Guide | | Antigravity | Setup Guide |

3. Connect from Roblox

The installer prints this for you. Put it in your executor or Auto Execute:

local bridgeUrl = getgenv().BridgeURL or "localhost:16384"
loadstring(game:HttpGet("http://" .. bridgeUrl .. "/script.luau"))()

Optional settings (set before the loadstring):

getgenv().BridgeURL = "10.0.0.4:16384"                  -- default: localhost:16384
getgenv().DisableWebSocket = true                        -- force HTTP polling
getgenv().DisableInitialScriptDecompMapping = true       -- skip initial decompilation

After the MCP server starts and Roblox connects, open the dashboard:

http://localhost:16384/

Community

Have a suggestion or need help? Join the Discord server.

Security

This server allows arbitrary code execution. Only use with AI clients you trust. Port 16384 has no authentication — never expose it to the internet. For cross-machine setups, use a local network, VPN, or SSH tunnel. See Advanced for details.

License

MIT

Roblox Executor MCP