unity-mcp/Server
dsarno 5511a2b8ad
🔧 Clean up & Consolidate Shared Services Across MCP Tools (#519)
* feat: Redesign GameObject API for better LLM ergonomics

- find_gameobjects: Search GameObjects, returns paginated instance IDs only
- manage_components: Component lifecycle (add, remove, set_property)

- unity://scene/gameobject/{id}: Single GameObject data (no component serialization)
- unity://scene/gameobject/{id}/components: All components (paginated)
- unity://scene/gameobject/{id}/component/{name}: Single component by type

- manage_scene get_hierarchy: Now includes componentTypes array
- manage_gameobject: Slimmed to lifecycle only (create, modify, delete)
  - Legacy actions (find, get_components, etc.) log deprecation warnings

- ParamCoercion: Centralized int/bool/float/string coercion
- VectorParsing: Vector3/Vector2/Quaternion/Color parsing
- GameObjectLookup: Centralized GameObject search logic

- 76 new Unity EditMode tests for ManageGameObject actions
- 21 new pytest tests for Python tools/resources
- New NL/T CI suite for GameObject API (GO-0 to GO-5)

Addresses LLM confusion with parameter overload by splitting into
focused tools and read-only resources.

* feat: Add GameObject API stress tests and NL/T suite updates

Stress Tests (12 new tests):
- BulkCreate small/medium batches
- FindGameObjects pagination with by_component search
- AddComponents to single object
- GetComponents with full serialization
- SetComponentProperties (complex Rigidbody)
- Deep hierarchy creation and path lookup
- GetHierarchy with large scenes
- Resource read performance tests
- RapidFire create-modify-delete cycles

NL/T Suite Updates:
- Added GO-0..GO-10 tests in nl-gameobject-suite.md
- Fixed tool naming: mcp__unity__ → mcp__UnityMCP__

Other:
- Fixed LongUnityScriptClaudeTest.cs compilation errors
- Added reports/, .claude/local/, scripts/local-test/ to .gitignore

All 254 EditMode tests pass (250 run, 4 explicit skips)

* fix: Address code review feedback

- ParamCoercion: Use CultureInfo.InvariantCulture for float parsing
- ManageComponents: Move Transform removal check before GetComponent
- ManageGameObjectFindTests: Use try-finally for LogAssert.ignoreFailingMessages
- VectorParsing: Document that quaternions are not auto-normalized
- gameobject.py: Prefix unused ctx parameter with underscore

* fix: Address more code review feedback

NL/T Prompt Fixes:
- nl-gameobject-suite.md: Remove non-existent list_resources/read_resource from AllowedTools
- nl-gameobject-suite.md: Fix parameter names (component_type, properties)
- nl-unity-suite-nl.md: Remove unused manage_editor from AllowedTools

Test Fixes:
- GameObjectAPIStressTests: Add null check to ToJObject helper
- GameObjectAPIStressTests: Clarify AudioSource usage comment
- ManageGameObjectFindTests: Use built-in 'UI' layer instead of 'Water'
- LongUnityScriptClaudeTest: Clean up NL/T test artifacts (Counte42 typo, HasTarget)

* docs: update README tools and resources lists

- Add missing tools: manage_components, batch_execute, find_gameobjects, refresh_unity
- Add missing resources: gameobject_api, editor_state_v2
- Make descriptions more concise across all tools and resources
- Ensure documentation matches current MCP server functionality

* chore: Remove accidentally committed test artifacts

- Remove Materials folder (40 .mat files from interactive testing)
- Remove Shaders folder (5 noise shaders from testing)
- Remove test scripts (Bounce*, CylinderBounce* from testing)
- Remove Temp.meta and commit.sh

* refactor: remove deprecated manage_gameobject actions

- Remove deprecated switch cases: find, get_components, get_component, add_component, remove_component, set_component_property
- Remove deprecated wrapper methods (423 lines deleted from ManageGameObject.cs)
- Delete ManageGameObjectFindTests.cs (tests deprecated 'find' action)
- Remove deprecated test methods from ManageGameObjectTests.cs
- Add GameObject resource URIs to README documentation
- Add batch_execute performance tips to README, tool description, and gameobject_api resource
- Enhance batch_execute description to emphasize 10-100x performance gains

Total: ~1200 lines removed. New API (find_gameobjects, manage_components, resources) is the recommended path forward.

* refactor: consolidate shared services across MCP tools

Major architectural improvements:
- Create UnityJsonSerializer for shared JSON/Unity type conversion
- Create ObjectResolver for unified object resolution (GameObjects, Components, Assets)
- Create UnityTypeResolver for consolidated type resolution with caching
- Create PropertyConversion for unified JSON→Unity property conversion
- Create ComponentOps for low-level component operations
- Create Pagination helpers for standardized pagination across tools

Tool simplifications:
- ManageGameObject: Remove 68-line prefab redirect anti-pattern, delegate to helpers
- ManageAsset: Remove ~80 lines duplicate ConvertJTokenToType
- ManageScriptableObject: Remove ~40 lines duplicate ResolveType
- ManageComponents: Use ComponentOps, UnityTypeResolver (~90 lines saved)
- ManageMaterial: Standardize to SuccessResponse/ErrorResponse patterns
- FindGameObjects: Use PaginationRequest/PaginationResponse
- GameObjectLookup: FindComponentType delegates to UnityTypeResolver

Tests: 242/246 passed, 4 skipped (expected)

* Apply code review feedback: consolidate utilities and improve compatibility

Python Server:
- Extract normalize_properties() to shared utils.py (removes duplication)
- Move search_term validation before preflight() for fail-fast
- Fix manage_script.py documentation (remove incorrect 'update' reference)
- Remove stale comments in execute_menu_item.py, manage_editor.py
- Remove misleading destructiveHint from manage_shader.py

C# Unity:
- Add Vector4Converter (commonly used, was missing)
- Fix Unity 2021 compatibility: replace FindObjectsByType with FindObjectsOfType
- Add path normalization in ObjectResolver before StartsWith check
- Improve ComponentOps.SetProperty conversion error detection
- Add Undo.RecordObject in ManageComponents before property modifications
- Improve error message clarity in ManageMaterial.cs
- Add defensive error handling to stress test ToJObject helper
- Increase CI timeout thresholds for test stability

GitHub Workflows:
- Fix GO test sorting in markdown output (GO-10 now sorts after GO-9)
- Add warning logging for fragment parsing errors

* Fix animator hash names in test fixture to match parameter names

BlendXHash/BlendYHash now use 'reachX'/'reachY' to match the
actual animator parameter names.

* fix(windows): improve HTTP server detection and auto-start reliability

- Fix netstat detection on Windows by running netstat.exe directly instead
  of piping through findstr (findstr returns exit code 1 when no matches,
  causing false detection failures)
- Increase auto-start retry attempts (20→30) and delays (2s→3s) to handle
  slow server starts during first install, version upgrades, and dev mode
- Only attempt blind connection after 20 failed detection attempts to reduce
  connection error spam during server startup
- Remove verbose debug logs that were spamming the console every frame

* fix: auto-create tags and remove deprecated manage_gameobject actions

- ManageGameObject.cs: Check tag existence before setting; auto-create
  undefined tags using InternalEditorUtility.AddTag() instead of relying
  on exception handling (Unity logs warning, doesn't throw)
- manage_gameobject.py: Remove deprecated actions (find, get_components,
  add_component, remove_component, set_component_property, get_component)
  from Literal type - these are now handled by find_gameobjects and
  manage_components tools
- Update test suite and unit tests to reflect new auto-create behavior

* fix: address code review feedback

Bug fixes:
- Fix searchInactive flag ignored in FindObjectsOfType (use includeInactive overload)
- Fix property lookup to try both original and normalized names for backwards compat
- Remove dead code for deprecated 'find' action validation
- Update error message to list only valid actions

Improvements:
- Add destructiveHint=True to manage_shader tool
- Limit fallback connection attempts (every 3rd attempt) to avoid spamming errors
- Consolidate PropertyConversion exception handlers to single catch block
- Add tag existence assertion and cleanup in tag auto-creation tests

Test fixes:
- Update SetComponentProperties_ContinuesAfterException log regex for new error format
- Update test_manage_gameobject_param_coercion to test valid actions only
2026-01-06 12:58:17 -08:00
..
src 🔧 Clean up & Consolidate Shared Services Across MCP Tools (#519) 2026-01-06 12:58:17 -08:00
tests 🔧 Clean up & Consolidate Shared Services Across MCP Tools (#519) 2026-01-06 12:58:17 -08:00
DOCKER_OVERVIEW.md Publish to Docker Hub (#468) 2025-12-19 17:24:04 -04:00
Dockerfile HTTP Server, uvx, C# only custom tools (#375) 2025-11-24 23:21:06 -04:00
LICENSE Publish to pypi (#466) 2025-12-19 16:43:44 -04:00
README.md chore: bump version to 8.7.1 2026-01-05 01:58:40 +00:00
__init__.py Copy the MCP server to the top level (#354) 2025-10-25 00:53:53 -04:00
pyproject.toml chore: bump version to 8.7.1 2026-01-05 01:58:40 +00:00
pyrightconfig.json Copy the MCP server to the top level (#354) 2025-10-25 00:53:53 -04:00
uv.lock feat: Add tool annotations for improved LLM tool understanding (#480) 2026-01-05 16:20:34 -08:00

README.md

MCP for Unity Server

MCP python License Discord

Model Context Protocol server for Unity Editor integration. Control Unity through natural language using AI assistants like Claude, Cursor, and more.

Maintained by Coplay - This project is not affiliated with Unity Technologies.

💬 Join our community: Discord Server

Required: Install the Unity MCP Plugin to connect Unity Editor with this MCP server. You also need uvx (requires uv) to run the server.


Installation

Option 1: PyPI

Install and run directly from PyPI using uvx.

Run Server (HTTP):

uvx --from mcpforunityserver mcp-for-unity --transport http --http-url http://localhost:8080

MCP Client Configuration (HTTP):

{
  "mcpServers": {
    "UnityMCP": {
      "url": "http://localhost:8080/mcp"
    }
  }
}

MCP Client Configuration (stdio):

{
  "mcpServers": {
    "UnityMCP": {
      "command": "uvx",
      "args": [
        "--from",
        "mcpforunityserver",
        "mcp-for-unity",
        "--transport",
        "stdio"
      ]
    }
  }
}

Option 2: From GitHub Source

Use this to run the latest released version from the repository. Change the version to main to run the latest unreleased changes from the repository.

{
  "mcpServers": {
    "UnityMCP": {
      "command": "uvx",
      "args": [
        "--from",
        "git+https://github.com/CoplayDev/unity-mcp@v8.7.1#subdirectory=Server",
        "mcp-for-unity",
        "--transport",
        "stdio"
      ]
    }
  }
}

Option 3: Docker

Use Pre-built Image:

docker run -p 8080:8080 msanatan/mcp-for-unity-server:latest --transport http --http-url http://0.0.0.0:8080

Build Locally:

docker build -t unity-mcp-server .
docker run -p 8080:8080 unity-mcp-server --transport http --http-url http://0.0.0.0:8080

Configure your MCP client with "url": "http://localhost:8080/mcp".

Option 4: Local Development

For contributing or modifying the server code:

# Clone the repository
git clone https://github.com/CoplayDev/unity-mcp.git
cd unity-mcp/Server

# Run with uv
uv run src/main.py --transport stdio

Configuration

The server connects to Unity Editor automatically when both are running. No additional configuration needed.

Environment Variables:

  • DISABLE_TELEMETRY=true - Opt out of anonymous usage analytics
  • LOG_LEVEL=DEBUG - Enable detailed logging (default: INFO)

Example Prompts

Once connected, try these commands in your AI assistant:

  • "Create a 3D player controller with WASD movement"
  • "Add a rotating cube to the scene with a red material"
  • "Create a simple platformer level with obstacles"
  • "Generate a shader that creates a holographic effect"
  • "List all GameObjects in the current scene"

Documentation

For complete documentation, troubleshooting, and advanced usage:

📖 Full Documentation


Requirements

  • Python: 3.10 or newer
  • Unity Editor: 2021.3 LTS or newer
  • uv: Python package manager (Installation Guide)

License

MIT License - See LICENSE