Tripwire

Tripwire

made by alibolly

[](https://www.npmjs.com/package/tripwire-roblox) [](https://github.com/aliboIly/Tripwire/actions/workflows/ci.yml) [](https://registry.modelcontextprotocol.io) [](LICENSE)

An MCP server that gives an AI coding agent real control of Roblox Studio and Roblox Open Cloud, with a test-and-security layer no other Studio MCP has.

Tripwire lets an assistant read, write, and edit the data model, drive playtests with simulated input, run tests-as-code headlessly in the real engine, flag client-trust exploits in game code, and call the Open Cloud APIs (DataStores, MessagingService, Memory Stores, and more). The Studio tools need no API key; the headless test, asset, and Open Cloud tools use an Open Cloud key.

---

Requirements

• An MCP client: Claude Code, Codex, Gemini, or any client that speaks MCP over stdio.
• Roblox Studio, for the Studio tools. These need no API key.
• Node.js, only if you run the server with npx. The prebuilt binary needs no Node.
• For the headless test, asset, and Open Cloud tools: a published place and a Roblox Open Cloud API key. See [Open Cloud setup](#open-cloud-setup).

Quickstart

Tripwire is for Roblox developers who drive Studio through an AI coding agent.

1. Wire the server into your MCP client (one command or a small config block, see [Install](#install) below).
2. Install the Studio plugin so the Studio tools can reach Studio (see the plugin step in Install).
3. Open your place in Studio, turn on Game Settings > Security > Allow HTTP Requests, then click the Tripwire toolbar button and press Connect in the panel. The panel shows Connected and the Output prints [Tripwire v...] connected.
4. Ask your agent to run studio_status. A connected Studio confirms the bridge works.
5. Optional: add an Open Cloud key for the headless test, asset, and Open Cloud tools (see Open Cloud setup).

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Install

Tripwire's server is a single binary. The easiest way to run it is with npx, which fetches the prebuilt binary for your platform, so there is no Rust toolchain to install. Prefer a manual binary or a source build? See the Alternatives at the end of this section.

Claude Code

One command:

claude mcp add --transport stdio tripwire -- npx -y tripwire-roblox

Or add it to a project .mcp.json (or ~/.claude.json):

{
  "mcpServers": {
    "tripwire": {
      "type": "stdio",
      "command": "npx",
      "args": ["-y", "tripwire-roblox"]
    }
  }
}

Codex

Add to ~/.codex/config.toml:

[mcp_servers.tripwire]
command = "npx"
args = ["-y", "tripwire-roblox"]

Or: codex mcp add tripwire -- npx -y tripwire-roblox

Gemini

Add to ~/.gemini/settings.json (or a project .gemini/settings.json):

{
  "mcpServers": {
    "tripwire": {
      "command": "npx",
      "args": ["-y", "tripwire-roblox"]
    }
  }
}

Or: gemini mcp add tripwire npx -y tripwire-roblox

Other MCP clients

Any client that speaks MCP over stdio can run it:

command: npx
args:    ["-y", "tripwire-roblox"]

Alternatives: prebuilt binary, or build from source

Prebuilt binary (no Node). Download the archive for your platform from the Releases page (for example tripwire-server-vX.Y.Z-aarch64-apple-darwin.tar.gz), extract it, and point your client's command at the extracted tripwire-server with empty args.

Build from source (needs Rust):

git clone https://github.com/aliboIly/Tripwire.git
cd Tripwire/server
cargo build --release   # produces server/target/release/tripwire-server

Then point your client's command at that binary path.

Studio plugin (required for the Studio tools)

The Studio tools reach Studio through a small plugin that long-polls the local server. Grab Tripwire.rbxmx from the Releases page, or build it:

cd Tripwire/plugin
npm install
npx rbxtsc
rojo build --output Tripwire.rbxmx
cp Tripwire.rbxmx ~/Documents/Roblox/Plugins/   # macOS; Windows: %LOCALAPPDATA%\Roblox\Plugins

Restart Studio, enable Game Settings > Security > Allow HTTP Requests, then click the Tripwire toolbar button and press Connect in the panel. The panel shows Connected and the Output prints [Tripwire v...] connected.

Open Cloud key (for headless tests, assets, and Open Cloud tools)

The Studio tools need no key. The Open Cloud tools do. See [Open Cloud setup](#open-cloud-setup) below for the full walkthrough.

---

Open Cloud setup

Most of Tripwire needs no credentials. These tools do, because they call Roblox Open Cloud: run_luau, the headless tests (run_tests, run_test_file, list_tests), upload_asset, publish_place, and the DataStore, Ordered DataStore, MessagingService, Memory Store, platform, and engagement tools. They authenticate with a Roblox Open Cloud API key.

> Use at your own risk. An Open Cloud key is a real credential with real power over your > experience. Depending on the scopes you grant it, it can read and overwrite your live DataStores, > publish new versions of your place, upload assets to your account, and message your servers. Treat > it like a password: grant only the scopes you actually use, restrict it to your own IP, never > commit it, and revoke it if it leaks. You are responsible for what you do with it. Tripwire is not > affiliated with or endorsed by Roblox.

1. Create the key

1. Go to create.roblox.com/dashboard/credentials and sign in.
2. Click Create API Key and name it (for example Tripwire).
3. Under Access Permissions, add only the API systems for the tools you want, and grant each the operation it needs, scoped to your experience:

• Luau Execution (write): run_luau and the headless tests.
• universe-places (write): publish_place.
• Assets (read + write): upload_asset.
• DataStores and Ordered DataStores: the data-store tools.
• Messaging Service (publish) and Memory Stores: those tools.
• User/Group/Inventory/Subscription/Notification: the platform and engagement tools.

1. Under Security, set Accepted IP Addresses to your machine's IP, or 0.0.0.0/0 to allow any (simplest for local use). Set an expiration if you want.
2. Click Save & Generate Key and copy the key string. It is shown only once.

2. Find your universe and place IDs

In the Studio command bar (View, then Command Bar), run:

print("universe", game.GameId, "place", game.PlaceId)

GameId is your ROBLOX_UNIVERSE_ID; PlaceId is your ROBLOX_PLACE_ID. The place must be published to Roblox for Open Cloud to act on it.

3. Give Tripwire the credentials

Create a .env at the repo root. It is gitignored and the server loads it automatically:

ROBLOX_OPEN_CLOUD_KEY=paste_the_key_here
ROBLOX_UNIVERSE_ID=000000
ROBLOX_PLACE_ID=000000
ROBLOX_CREATOR_USER_ID=000000   # only for upload_asset (your user id)

Or put the same variables in your MCP client's env block instead (those take precedence). Reconnect the MCP server after changing either. Each tool works when the key grants its scope and returns Roblox's own error if a scope is missing, so you can add scopes as you go.

---

Tools

Connection

studiostatusWhether a Studio is connected, the active place, and any other connected studios. pingstudioRound-trip a ping through the plugin to confirm the live bridge works. liststudiosList every connected (or recently seen) Studio: place, whether it is active, last-seen, and playtest state. setactive_studioChoose which connected Studio the tools target (by id, id prefix, or place name). Automatic with one Studio.

Read and inspect

getfiletreeList the instance tree from a path (default the whole game), bounded by depth. getinstancechildrenList the direct children (name and class) of an instance. getinstancepropertiesRead an instance's name, class, full path, attributes, and a curated set of common engine properties (Position, Size, Color, Material, Anchored, Text, and so on). searchobjectsFind instances whose name contains a query, optionally filtered by exact class or by class-and-subclasses (isA). searchbypropertyFind instances whose property equals a value, optionally filtered by exact class or by class-and-subclasses (isA). getscriptsourceRead the source of a Script, LocalScript, or ModuleScript. grepscriptsSearch script sources for a substring; returns path, line number, and line. getoutputlogRecent Studio Output entries (message, type, timestamp). getselectionThe instances currently selected in Studio. getclass_infoLook up a Roblox class's members (properties, methods, events) with their types, inherited members folded in. Answered from a bundled API reflection dump, so it needs no Studio and no key.

Spatial (read-only)

raycastCast a ray and report the first hit (instance, position, normal, material, distance) or no hit, with an optional excluded subtree. getboundingboxThe world-space bounding box (center and size) of a Model or BasePart. findspawnsList the SpawnLocations under a path: position, whether each is enabled, and whether it is neutral. capturescreenshotCapture the Studio viewport as a JPEG image so the agent can see the scene. Needs the plugin connected and Allow Mesh / Image APIs enabled (Game Settings, Security). Edit mode only.

Edit (each is one undo step)

createinstanceCreate an instance of a class with an optional name and initial properties. deleteinstanceDestroy an instance and its descendants. setpropertySet one typed property (primitive, Vector3, Color3, UDim2, CFrame, EnumItem, or an instance reference). updatescriptsourceReplace a script's source through the script editor (the supported write path). insertmodelInsert an asset by id, with optional reposition or unpack. masscreateCreate many instances in one undo step (atomic, or best-effort with per-item results). massset_propertySet one property on many instances in one undo step (atomic or best-effort).

Playtest and input

startplaytestStart an F5 playtest (server and client DataModels with a player); injects the in-play runner. stopplaytestStop the F5 playtest (best-effort; F5 teardown can outlast the confirmation). startsimulationStart an F8 run (server-only simulation, no client or player). stopsimulationStop the F8 run (clean). simulatemouseinputClick or move the mouse at screen coordinates during an F5 playtest. simulatekeyboardinputPress a key (tap/press/release) or type text during an F5 playtest. characternavigationWalk the local character toward a world position; reports whether it reached the goal. getplaytestoutputThe running playtest's output log, aggregated across the server and client peers. Pass the cursor from the previous call as since to get only new lines; the buffer is bounded so long sessions do not freeze it. resetplaytestoutputClear the playtest's output buffers so the next read starts fresh, without restarting Studio. runluauliveEvaluate Luau in the live F5 playtest server and return the result, so you can inspect the running game (a Humanoid's state, an NPC's position, a path's waypoints) without adding a print and replaying. Needs an active playtest and ServerScriptService.LoadStringEnabled on in the test place. Distinct from runluau, which is headless against the published place.

Tests and headless execution (Open Cloud)

runluauRun a Luau script headlessly in the published place; returns the results and logs. runtestsRun the headless test suite in the published place and report passed/failed with messages. runtestfileRun a single spec by name, headlessly. listtestsList the spec files and their cases discovered in the published place. writetestWrite a roblox-ts test spec to disk; rebuild and publish, then run_tests picks it up.

Security review (static analysis, no key)

reviewsecurityReview the game source for client-trust and unvalidated-remote issues, each with a suggested server-side fix. scanremotesList server remote handlers and the client-controlled parameters of each. scanclienttrustFlag server handlers that use client-supplied values without validating them.

Assets and publishing (Open Cloud)

uploadassetUpload a local file as a Roblox asset (Decal, Audio, Model, Animation, or Video); returns the assetId. publishplacePublish a local place file (.rbxl/.rbxlx) as a new version of the experience.

DataStores (Open Cloud)

listdatastoresList the standard data stores in the universe. listdatastoreentriesList entry keys in a data store. getdatastoreentryRead an entry's value and metadata. setdatastoreentryCreate or overwrite an entry (value plus optional users/attributes). deletedatastoreentrySoft-delete an entry (purged after 30 days). incrementdatastoreentryAtomically add an integer to a numeric entry. listorderedentriesList ordered data store entries by value, ascending or descending. getorderedentryRead one ordered data store entry. setorderedentrySet (upsert) an ordered data store entry to a non-negative integer. incrementordered_entryAtomically add to an ordered data store entry.

Messaging and memory (Open Cloud)

publishmessagePublish a message to a MessagingService topic (reaches running production servers). memorysortedmapsetSet (upsert) a Memory Store sorted-map item, with TTL and sort keys. memorysortedmapgetRead a Memory Store sorted-map item. memorysortedmaplistList sorted-map items in sort order. memorysortedmapdeleteDelete a sorted-map item. memoryqueueaddAdd an item to a Memory Store queue, with priority and TTL. memoryqueuereadRead items from a queue; returns a readId for the discard call. memoryqueue_discardPermanently remove a read batch by its readId.

Platform and engagement (Open Cloud)

getuniverseThe configured universe's metadata. getplaceThe configured place's metadata. getuserA user's public profile. getgroupA group's metadata. listinventoryA user's inventory items, filterable by type or id. sendnotificationSend an experience notification to a user (from a Creator Dashboard template). get_subscriptionRead a user's subscription to a subscription product.

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What you can do

• Build scenes from a prompt. Create and mass-create instances, set typed properties, insert

models, and write scripts, each as a clean undo step.

• Test gameplay in CI. Write specs, run them headlessly in the real engine through Open Cloud,

and gate pull requests on the results.

• Catch exploits before they ship. The security reviewer flags server handlers that trust client

input and suggests the server-side fix; the same check runs automatically on every PR.

• Drive a real playtest. Enter Play mode, send keyboard and mouse input, walk the character to a

spot, read the combined server/client output, then stop.

• Inspect a live place. Read the instance tree, search by name or property, read and grep

scripts, and pull the Output log.

• Automate Open Cloud. Seed DataStores for test fixtures, publish a place, broadcast a

MessagingService topic, or look up users, groups, and inventory.

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Known limits

These are platform limits, not bugs. They are written down here so you know going in.

• F5 playtest stop is best-effort. stop_playtest may not take, because the plugin and the running game are separate DataModels. stop_simulation (F8) stops cleanly. If an F5 playtest will not stop, press Stop in Studio.
• In-play actions go through an injected runner. Input, runtime state, and stop during a playtest are relayed over the bridge, not called directly on the plugin.
• Headless tests run a server context. Open Cloud runs your published place on a server, where RunService:IsStudio() is false and plugin APIs are absent. Use it for server and gameplay logic and the securi

…

Source & license

This open-source MCP server is cataloged on AgentStack and links to its original source — we do not rehost the code.

• Author: aliboIly
• Source: aliboIly/Tripwire
• License: MIT
• Homepage: https://www.npmjs.com/package/tripwire-roblox

Install and usage instructions live in the source repository linked above.