Funplay Unity MCP Server

stdio bridge for the local Unity Editor MCP server from FunplayAI/funplay-unity-mcp.

Local serverstdioPython

What is the Funplay Unity MCP MCP server?

Funplay Unity MCP MCP server exists for a simple reason — assistants are far more useful when they can act on Funplay Unity MCP directly instead of describing what you should do. stdio bridge for the local Unity Editor MCP server from FunplayAI/funplay-unity-mcp.

What you get

The Most Advanced MCP Server for Unity Editor

  • execute_code First — — Optimized around one in-memory C# execution tool for rich editor/runtime orchestration. See execute_code: In-Memory C# Execution below for details
  • Default Safety Checks — — execute_code now has persistent default-on safety toggles, including a stricter filesystem guard for clients that do not expose per-call arguments clearly
  • Play Mode Automation — — Enter play mode, simulate keyboard/mouse input, capture screenshots, inspect logs, and validate behavior from the same MCP session
  • Project Context Built In — — Exposes live resources for project state, active scene, selection, compilation, console output, and MCP interaction history
  • Focused by Default, Full When Needed — — core exposes a compact high-signal toolset; full exposes all 156 tools
  • Single Unity Package — — No extra approval UI, no external daemon to click through, and no Python requirement for the Unity-side plugin itself

What the assistant can call

Once Funplay Unity MCP is connected, these are the calls the assistant has available:

  • Category — Tools
  • GameObject — create_primitive, create_game_object, delete_game_object, find_game_objects, get_game_object_info, set_transform, duplicate_game_object
  • Hierarchy — get_hierarchy
  • Components — get_component_properties, list_components, set_component_property, set_component_properties
  • Scripts — create_script, edit_script, patch_script
  • Assets — create_material, assign_material, find_assets, delete_asset, rename_asset, copy_asset
  • References — find_references, find_broken_references
  • Mesh — get_mesh_info
  • Materials — get_material_properties, set_material_property
  • Files — read_file, write_file, search_files, list_directory, exists
  • Scene — get_scene_info, list_scenes, load_scene_additive, unload_scene, list_dirty_scenes, save_all_scenes, save_scene, open_scene, create_new_scene
  • Physics — physics_raycast, physics_overlap, physics2d_overlap_point

Configuration and credentials

  • This package is Editor-only. It does not add runtime components to your built game. - The MCP server starts on http://127.0.0.1:8765/ by default. - Local MCP server settings are stored in UserSettings/FunplayMcpSettings.json. - The package defaults to the core MCP tool profile to reduce tool-list noise for AI clients. core currently exposes 34 high-signal tools centered on

Setting it up

Setup follows the usual MCP pattern — install or clone the server, register it in your client's configuration file, restart the client. The configuration blocks on this page cover the common clients.

Choosing this one

Among the knowledge and memory options, the useful question is rarely "what can it do" but "what does it cost you to run" — permissions, credentials, and how much of your context its toolset consumes. Funplay Unity MCP's toolset — Category, GameObject, Hierarchy and 11 more — is a fair guide to whether it matches your workflow. It is maintained by FunplayAI; worth a glance at recent repository activity before you build anything load-bearing on it.

SyncDev reviews every entry in this directory against the project's own documentation before publishing, and revisits them as servers change.

Before you rely on it

  • It runs with your machine's permissions. That is convenient and also the reason to think about what you point it at before you approve a tool call.
  • With 14 tools registered it takes up a noticeable share of the context window; turn it off in projects that never touch Funplay Unity MCP.
  • MCP clients confirm each tool call by default. Leave that on until you have watched what the funplay unity mcp mcp server does with a few real requests.

Available tools

ToolWhat it does
CategoryTools
GameObjectcreate_primitive, create_game_object, delete_game_object, find_game_objects, get_game_object_info, set_transform, duplicate_game_object, rename_game_object, set_parent, add_component, set_tag_and_layer, set_active
Hierarchyget_hierarchy
Componentsget_component_properties, list_components, set_component_property, set_component_properties
Scriptscreate_script, edit_script, patch_script
Assetscreate_material, assign_material, find_assets, delete_asset, rename_asset, copy_asset
Referencesfind_references, find_broken_references
Meshget_mesh_info
Materialsget_material_properties, set_material_property
Filesread_file, write_file, search_files, list_directory, exists
Sceneget_scene_info, list_scenes, load_scene_additive, unload_scene, list_dirty_scenes, save_all_scenes, save_scene, open_scene, create_new_scene, enter_play_mode, exit_play_mode, set_time_scale, get_time_scale
Physicsphysics_raycast, physics_overlap, physics2d_overlap_point
Particlesparticle_control
Lightingget_lighting_settings, set_lighting_settings, bake_lightmaps

How to install the Funplay Unity MCP MCP server

{
  "mcpServers": {
    "funplay": {
      "type": "http",
      "url": "http://127.0.0.1:8765/"
    }
  }
}

Configuration as documented by the project. Restart the client after saving.

Configuration

  • This package is Editor-only. It does not add runtime components to your built game. - The MCP server starts on http://127.0.0.1:8765/ by default. - Local MCP server settings are stored in UserSettings/FunplayMcpSettings.json. - The package defaults to the core MCP tool profile to reduce tool-list noise for AI clients. core currently exposes 34 high-signal tools centered on

Example prompts to try

  • Use Funplay Unity MCP to Category.
  • Use Funplay Unity MCP to GameObject.
  • Use Funplay Unity MCP to Hierarchy.

Frequently asked questions

It connects Funplay Unity MCP to MCP-compatible AI assistants such as Claude and Cursor, exposing 14 tools (Category, GameObject, Hierarchy, and more) that the assistant can call on your behalf. Instead of copying data back and forth by hand, the assistant works with Funplay Unity MCP directly.