uni-cli
Token-efficient CLI for LLM agents to control Unity Editor via MCP. Reduces token overhead by ~31x compared to raw MCP tool schemas.
Part of the uni-cli project — extends unity-mcp with additional Unity subsystem tools.
Why
LLM agents talking to Unity through MCP pay a heavy token tax — large tool schemas and verbose JSON responses eat context window budget. uni-cli solves this with a compact CLI layer:
| Metric | Value |
|---|---|
| Per-response output reduction | 79–98% (median 92.8%) |
| Tool schema overhead | MCP 14,877 → CLI 480 tokens (31x reduction) |
Install
pip install unity-mcp-cli
Prerequisites:
- Python 3.10+
- unity-mcp running in your Unity project
Usage
# List scene hierarchy (compact output)
uni-cli hierarchy ls --instance MyProject --fields id,name,parent --limit 50
# Create a GameObject
uni-cli object create --instance MyProject --name "Player" --preset Cube --pos 0,1,0
# Search assets
uni-cli asset search --instance MyProject --query "*.prefab" --limit 20
# Get full JSON output
uni-cli hierarchy ls --format json --limit 10
# List available MCP tools
uni-cli tools
Output Format
Compact row-based format designed for minimal token usage:
row id=12345 name="Main Camera" active=1 parent=-1
row id=12346 name="Directional Light" active=1 parent=-1
ok op=hierarchy.ls count=2 next="" truncated=0
Commands
| Command | Description |
|---|---|
hierarchy ls |
List scene hierarchy |
object create/get/modify/delete |
GameObject operations |
asset search/info/create/delete |
Asset operations |
batch apply |
Execute batch commands from file |
ui-toolkit <action> |
UI Toolkit (UXML, USS, VisualElement) |
addressables <action> |
Addressable Asset System |
dots <action> |
DOTS / ECS |
shader-graph <action> |
Shader Graph |
tools |
List available MCP tools |
Global Options
| Option | Default | Description |
|---|---|---|
--url |
http://127.0.0.1:8080/mcp |
MCP server URL |
--instance |
auto-detect | Unity instance selector |
--format |
compact |
Output format (compact or json) |
--timeout |
30 |
Request timeout in seconds |
Zero Dependencies
uni-cli uses only Python standard library — no external packages required.
License
1 maintainer
Metadata
1 maintainer
Release files for unity-mcp-cli 0.2.0
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