Unity-MCP MCP — Use Cases, Install & Live Demo

Why use it

Key features

100+ tools across assets, scenes, scripts, components, tests, and editor state
Roslyn-based C# code execution for one-shot automation snippets
Screenshot capture from scene/game/any camera — great for visual verification
CLI (unity-mcp-cli) for quick per-project plugin install
Supports stdio and streamable HTTP transports, multi-agent compatible

Live Demo

What it looks like in practice

unity-2.replay ▶ ready

0/0

Install

Pick your client

~/Library/Application Support/Claude/claude_desktop_config.json · Windows: %APPDATA%\Claude\claude_desktop_config.json

{
  "mcpServers": {
    "unity-2": {
      "command": "TODO",
      "args": [
        "See README: https://github.com/IvanMurzak/Unity-MCP"
      ],
      "_inferred": true
    }
  }
}

Open Claude Desktop → Settings → Developer → Edit Config. Restart after saving.

~/.cursor/mcp.json · .cursor/mcp.json

{
  "mcpServers": {
    "unity-2": {
      "command": "TODO",
      "args": [
        "See README: https://github.com/IvanMurzak/Unity-MCP"
      ],
      "_inferred": true
    }
  }
}

Cursor uses the same mcpServers schema as Claude Desktop. Project config wins over global.

VS Code → Cline → MCP Servers → Edit

{
  "mcpServers": {
    "unity-2": {
      "command": "TODO",
      "args": [
        "See README: https://github.com/IvanMurzak/Unity-MCP"
      ],
      "_inferred": true
    }
  }
}

Click the MCP Servers icon in the Cline sidebar, then "Edit Configuration".

~/.codeium/windsurf/mcp_config.json

{
  "mcpServers": {
    "unity-2": {
      "command": "TODO",
      "args": [
        "See README: https://github.com/IvanMurzak/Unity-MCP"
      ],
      "_inferred": true
    }
  }
}

Same shape as Claude Desktop. Restart Windsurf to pick up changes.

~/.continue/config.json

{
  "mcpServers": [
    {
      "name": "unity-2",
      "command": "TODO",
      "args": [
        "See README: https://github.com/IvanMurzak/Unity-MCP"
      ]
    }
  ]
}

Continue uses an array of server objects rather than a map.

~/.config/zed/settings.json

{
  "context_servers": {
    "unity-2": {
      "command": {
        "path": "TODO",
        "args": [
          "See README: https://github.com/IvanMurzak/Unity-MCP"
        ]
      }
    }
  }
}

Add to context_servers. Zed hot-reloads on save.

claude mcp add unity-2 -- TODO 'See README: https://github.com/IvanMurzak/Unity-MCP'

One-liner. Verify with claude mcp list. Remove with claude mcp remove.

Use Cases

Real-world ways to use Unity-MCP

How to batch-process imported assets with a single prompt

👤 Unity technical artists ⏱ ~25 min intermediate

When to use: You have 200 new textures and want consistent import settings, mip maps, and atlas placement.

Prerequisites

Unity project open, plugin installed — unity-mcp-cli install-plugin ./MyUnityProject or import the .unitypackage
An MCP client configured — Point Claude Desktop or Cursor at the local MCP server printed by the CLI

Flow

Audit current settings

List every texture in Assets/Textures/UI. Show current TextureImporter settings grouped by the values used.✓ Copied

→ Groups by settings — mostly consistent with outliers flagged
Apply a policy

For all of them set compression=HighQuality, filter=Bilinear, mipmaps=false. Reimport.✓ Copied

→ Progress log + final consistent state
Verify visually

Take a screenshot of Scene MainMenu from the default camera — confirm nothing looks broken.✓ Copied

→ Screenshot returned, sanity-check passes

Outcome: Uniform import settings across a folder + a screenshot trail.

Pitfalls

Reimport blocks the editor domain reload — Save scene first; don't issue unrelated commands until reimport is done

Combine with: filesystem

How to run a one-off C# snippet in the Editor without writing a script

👤 Unity devs doing throwaway cleanup ⏱ ~15 min advanced

When to use: You want to iterate through every prefab and fix a broken reference — once.

Flow

Describe the snippet

Execute C# via Roslyn: iterate every prefab under Assets/Prefabs, find MissingScript components, list the prefab + missing script guid.✓ Copied

→ Report of bad prefabs
Apply the fix

Now remove those MissingScript components and save each prefab.✓ Copied

→ Updated prefab count

Outcome: A project free of missing-script warnings.

Pitfalls

Roslyn exec has full editor power — a bad snippet can corrupt the project — Commit to git before running; review the code snippet before executing

Combine with: github

How to triage a visual regression via screenshots

👤 QA, solo devs ⏱ ~10 min beginner

When to use: A tester says 'the menu looks wrong' and you want a ground-truth image fast.

Flow

Open the suspect scene

Open scene MainMenu and take a screenshot from the UI camera at 1920x1080.✓ Copied

→ Screenshot file path returned
Compare with a reference

Here is the golden image [attach]. Describe the differences.✓ Copied

→ Specific callouts (offsets, colors, missing elements)

Outcome: A bug report with image evidence attached.

Combine with: github

Combinations

Pair with other MCPs for X10 leverage

unity-2 + github

Automate refactors + commit + PR from chat

Rename the PlayerController.Speed field to MoveSpeed everywhere, run tests, commit and open a PR.✓ Copied

unity-2 + filesystem

Import external 3D models into the project

Move every .fbx from ~/Downloads/kenney/ into Assets/Models/ and set them to read/write disabled.✓ Copied

Tools

What this MCP exposes

Tool	Inputs	When to call	Cost
scene_open	path: str	Load a scene before inspection or edits	free
gameobject_find	query: str	Locate objects	free
component_add	target, type, values?	Attach components	free
script_create	path, body	New C# file	free
csharp_execute	code: str	One-off editor automation	free
test_run	mode: 'Edit'\|'Play', filter?	Run unit/play tests	free
screenshot	camera?: str, resolution?: {w,h}	Visual verification	free
console_read	since_ms?	Check errors after changes	free

Cost & Limits

What this costs to run

API quota: No remote API — all local
Tokens per call: Scene listings can grow large; cap with filters
Monetary: Free, open source
Tip: Prefer narrow queries (gameobject_find 'Enemy*') over full-hierarchy dumps.

Security

Permissions, secrets, blast radius

Minimum scopes: Local filesystem write to the project

Credential storage: None — localhost only

Data egress: Localhost. Your LLM provider receives whatever scene/script content the tool returns.

Never grant: Do not expose the MCP HTTP port to non-loopback interfaces

csharp_execute can read/write anything the editor can — commit before risky runs.

Troubleshooting

Common errors and fixes

Project path contains spaces: tools fail

Move the project to a path with no spaces. This is a documented limitation.

CLI cannot find Unity

Set UNITY_EDITOR_PATH env var to the editor binary.

Verify: $UNITY_EDITOR_PATH -version

csharp_execute throws 'type not found'

Unity must have compiled successfully before execution. Fix red console first and refresh.

Alternatives

Unity-MCP vs others

Alternative	When to use it instead	Tradeoff
MCP for Unity (CoplayDev)	You want the most popular option with a large tool surface	No Roslyn-based arbitrary C# execution
mcp-unity (CoderGamester)	Simpler surface focused on scenes/tests	Fewer advanced tools

More

Resources

📖 Read the official README on GitHub

🐙 Browse open issues

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