Roblox MCP: Studio's Built-in Server, How to Connect It, and How to Add Real 3D Models

What is Roblox MCP?

The Model Context Protocol is an open standard that lets an AI assistant use tools in another program. Roblox built a server for it straight into Studio. Your AI client starts it as a local process and talks to your open Studio session over standard input and output.

Roblox announced the built-in server in March 2026 and made it the recommended way to connect outside AI tools. Its tools stay in step with the Studio Assistant: when Roblox adds a capability to the Assistant, the MCP server gets it too, with no update for you to install. The older open source server still exists for people who want to modify it.

How do you connect Claude Code or Cursor to Roblox Studio?

Four steps, and the third one writes the config for you.

1. 1

   Update Roblox Studio

   The MCP server is built into current versions of Studio, so there is nothing to download. Install your AI client first so Studio can detect it.

2. 2

   Turn on the server

   Open the Assistant, click the three dots, choose Manage MCP Servers and switch on Enable Studio as MCP server.

3. 3

   Quick connect your client

   Expand Quick connect and flip the toggle next to your client. Studio writes the configuration for you.

4. 4

   Restart the client properly

   Many clients keep running in the system tray after you close the window. Quit them fully, start again, and look for the green connected indicator in the Assistant settings.

{
  "mcpServers": {
    "Roblox_Studio": {
      "command": "cmd.exe",
      "args": ["/c", "%LOCALAPPDATA%\\Roblox\\mcp.bat"]
    },
    "3daistudio": {
      "url": "https://mcp.3daistudio.com/mcp"
    }
  }
}

{
  "mcpServers": {
    "Roblox_Studio": {
      "command": "/Applications/RobloxStudio.app/Contents/MacOS/StudioMCP"
    },
    "3daistudio": {
      "url": "https://mcp.3daistudio.com/mcp"
    }
  }
}

The Roblox entries above are copied from Roblox's documentation and work in any client that reads an mcpServers file. The second entry adds 3D AI Studio, which we will use below, in the URL format Cursor and most editors accept; it signs in through your browser the first time, so there is no key to paste. In Claude Code you add it with one command:

claude mcp add --transport http --scope user 3daistudio https://mcp.3daistudio.com/mcp

What can an AI agent do in Roblox Studio?

More than most engine integrations, because Roblox gave it the playtest loop. These are the jobs it handles well:

What can't Roblox MCP do?

How do you add real 3D models to a Roblox game with AI?

Give the agent a second MCP server that makes meshes. With 3D AI Studio connected next to Studio, one conversation covers the whole job: the model gets generated, exported in a format Roblox imports, and then placed and scripted by the Studio server.

> make a low poly treasure chest for the end of the obby, under 5k tris. FBX please
● 3daistudio · generate_p2  (low poly, quad mesh, textured)
  └ done in 2m 41s · 4,812 triangles
● 3daistudio · convert_model  (fbx)
Saved to assets/TreasureChest.fbx. Import it with File › Import 3D and tell me when it is in.
 
> imported, it's in Workspace
● Roblox_Studio · list_roblox_studios
● Roblox_Studio · edits Workspace.TreasureChest, adds ProximityPrompt + ChestScript
Anchored it at the finish line and added a script that plays a sound and awards 50 coins when opened.

Below are real image-to-3D results from 3D AI Studio, the kind of props and armor a Roblox game needs. Pick an input image and drag the model; switch to clay to see the mesh without textures.

Choose an input image

What are Roblox's limits for imported meshes?

Roblox rejects or degrades meshes that break its specifications, so ask for the right budget up front. From Roblox's current documentation:

• Ask for low poly from the start. P2 generates game-ready low poly topology directly. For a model you already have, ask 3D AI Studio to make a low poly version with a triangle target.
• Ask for FBX or glTF, not OBJ. Both carry textures and hierarchy into Studio. OBJ is more limited.
• Check the scale in the Importer. Generated models arrive at an arbitrary size. Set the scale unit there, or ask the agent to resize the MeshPart afterwards.

Prompts that work for Roblox assets

A good asset prompt names the object, the style and the budget. Copy these into your agent and change the nouns.

Make a low poly treasure chest, stylized, under 5,000 triangles, and export it as FBX.

Turn this sketch into a 3D sword for my Roblox game. Keep it under 3,000 triangles.

Generate 5 matching props for a pirate island: barrel, crate, cannon, anchor, palm tree.
Same stylized look, low poly, FBX.

Make a cute blocky pet dragon, front view on a plain background first,
then turn that image into a 3D model.

After I import the chest, add a ProximityPrompt that opens it and gives the player 50 coins.

For a set that has to look consistent, generate one reference image first, then ask for the rest "in the same style as the first image". Generating 3D straight from text works too, but a shared reference keeps a pack of props from looking like five different games.

Frequently asked questions