# Gameobject Create > Create a new GameObject in the currently opened Prefab or active Scene, optionally parented under another GameObject and pre-positioned. Pass `primitiveType` to spawn a Unity primitive (Cube, Sphere, etc.) instead of an empty GameObject. - **Type:** Skill - **Install:** `agentstack add skill-ivanmurzak-unity-mcp-gameobject-create` - **Verified:** Yes — security-reviewed for prompt injection and unsafe behavior - **Seller:** [IvanMurzak](https://agentstack.voostack.com/s/ivanmurzak) - **Installs:** 0 - **Category:** [AI & ML](https://agentstack.voostack.com/c/ai-and-ml) - **Latest version:** 0.1.0 - **License:** Apache-2.0 - **Upstream author:** [IvanMurzak](https://github.com/IvanMurzak) - **Source:** https://github.com/IvanMurzak/Unity-MCP/tree/main/Unity-MCP-Plugin/.claude/skills/gameobject-create - **Website:** https://ai-game.dev ## Install ```sh agentstack add skill-ivanmurzak-unity-mcp-gameobject-create ``` Requires the [AgentStack CLI](https://agentstack.voostack.com/docs/cli). Works with Claude Code, Cursor, and any MCP-compatible agent. ## About # GameObject / Create Create a new GameObject in opened Prefab or in a Scene. If needed - provide proper 'position', 'rotation' and 'scale' to reduce amount of operations. ## Inputs - `name` — required non-empty name. - `parentGameObjectRef` (optional) — when provided, the new GameObject is parented under this one (`SetParent(parent, worldPositionStays: false)`); otherwise it's created at scene/prefab root. - `position` / `rotation` / `scale` — optional transform; default to zero / zero / one. - `isLocalSpace` — when `true`, applies the transform in local space relative to the parent. - `primitiveType` (optional) — when set, the GameObject is created via `GameObject.CreatePrimitive` (adds the appropriate renderer/collider for the primitive shape). ## How to Call ```bash unity-mcp-cli run-tool gameobject-create --input '{ "name": "string_value", "parentGameObjectRef": "string_value", "position": "string_value", "rotation": "string_value", "scale": "string_value", "isLocalSpace": false, "primitiveType": "string_value" }' ``` > For complex input (multi-line strings, code), save the JSON to a file and use: > ```bash > unity-mcp-cli run-tool gameobject-create --input-file args.json > ``` > > Or pipe via stdin (recommended): > ```bash > unity-mcp-cli run-tool gameobject-create --input-file - {"param": "value"} > EOF > ``` ### Troubleshooting If `unity-mcp-cli` is not found, either install it globally (`npm install -g unity-mcp-cli`) or use `npx unity-mcp-cli` instead. Read the /unity-initial-setup skill for detailed installation instructions. ## Input | Name | Type | Required | Description | |------|------|----------|-------------| | `name` | `string` | Yes | Name of the new GameObject. | | `parentGameObjectRef` | `any` | No | Parent GameObject reference. If not provided, the GameObject will be created at the root of the scene or prefab. | | `position` | `any` | No | Transform position of the GameObject. | | `rotation` | `any` | No | Transform rotation of the GameObject. Euler angles in degrees. | | `scale` | `any` | No | Transform scale of the GameObject. | | `isLocalSpace` | `boolean` | No | World or Local space of transform. | | `primitiveType` | `any` | No | | ### Input JSON Schema ```json { "type": "object", "properties": { "name": { "type": "string" }, "parentGameObjectRef": { "$ref": "#/$defs/AIGD.GameObjectRef" }, "position": { "$ref": "#/$defs/UnityEngine.Vector3" }, "rotation": { "$ref": "#/$defs/UnityEngine.Vector3" }, "scale": { "$ref": "#/$defs/UnityEngine.Vector3" }, "isLocalSpace": { "type": "boolean" }, "primitiveType": { "$ref": "#/$defs/UnityEngine.PrimitiveType" } }, "$defs": { "System.Type": { "type": "string" }, "AIGD.GameObjectRef": { "type": "object", "properties": { "instanceID": { "type": "integer", "description": "instanceID of the UnityEngine.Object. If it is '0' and 'path', 'name', 'assetPath' and 'assetGuid' is not provided, empty or null, then it will be used as 'null'. Priority: 1 (Recommended)" }, "path": { "type": "string", "description": "Path of a GameObject in the hierarchy Sample 'character/hand/finger/particle'. Priority: 2." }, "name": { "type": "string", "description": "Name of a GameObject in hierarchy. Priority: 3." }, "assetType": { "$ref": "#/$defs/System.Type", "description": "Type of the asset." }, "assetPath": { "type": "string", "description": "Path to the asset within the project. Starts with 'Assets/'" }, "assetGuid": { "type": "string", "description": "Unique identifier for the asset." } }, "required": [ "instanceID" ], "description": "Find GameObject in opened Prefab or in the active Scene." }, "UnityEngine.Vector3": { "type": "object", "properties": { "x": { "type": "number" }, "y": { "type": "number" }, "z": { "type": "number" } }, "required": [ "x", "y", "z" ], "additionalProperties": false }, "UnityEngine.PrimitiveType": { "type": "string", "enum": [ "Sphere", "Capsule", "Cylinder", "Cube", "Plane", "Quad" ] } }, "required": [ "name" ] } ``` ## Output ### Output JSON Schema ```json { "type": "object", "properties": { "result": { "$ref": "#/$defs/AIGD.GameObjectRef", "description": "Find GameObject in opened Prefab or in the active Scene." } }, "$defs": { "System.Type": { "type": "string" }, "AIGD.GameObjectRef": { "type": "object", "properties": { "instanceID": { "type": "integer", "description": "instanceID of the UnityEngine.Object. If it is '0' and 'path', 'name', 'assetPath' and 'assetGuid' is not provided, empty or null, then it will be used as 'null'. Priority: 1 (Recommended)" }, "path": { "type": "string", "description": "Path of a GameObject in the hierarchy Sample 'character/hand/finger/particle'. Priority: 2." }, "name": { "type": "string", "description": "Name of a GameObject in hierarchy. Priority: 3." }, "assetType": { "$ref": "#/$defs/System.Type", "description": "Type of the asset." }, "assetPath": { "type": "string", "description": "Path to the asset within the project. Starts with 'Assets/'" }, "assetGuid": { "type": "string", "description": "Unique identifier for the asset." } }, "required": [ "instanceID" ], "description": "Find GameObject in opened Prefab or in the active Scene." } }, "required": [ "result" ] } ``` ## Source & license This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code. - **Author:** [IvanMurzak](https://github.com/IvanMurzak) - **Source:** [IvanMurzak/Unity-MCP](https://github.com/IvanMurzak/Unity-MCP) - **License:** Apache-2.0 - **Homepage:** https://ai-game.dev Install and usage instructions live in the source repository linked above. ## Pricing - **Free** — Free ## Security capabilities Automated source analysis of v0.1.0 — what this tool can access: - **Network access:** no - **Filesystem access:** no - **Shell / process execution:** no - **Environment & secrets:** no - **Dynamic code execution:** no *"Yes" means the capability is present in the source — more access means more to trust, not that it is unsafe.* ## Versions - **0.1.0** — security scan: passed — Imported from the upstream source. ## Links - Listing page: https://agentstack.voostack.com/l/skill-ivanmurzak-unity-mcp-gameobject-create - Seller: https://agentstack.voostack.com/s/ivanmurzak - Browse the marketplace: https://agentstack.voostack.com/browse --- Listed on AgentStack — the marketplace for AI agent skills and MCP servers. Every listing is security-reviewed. Creators keep 70%.