Aseprite MCP Tools v2.0

日本語版はこちら | macOS Setup Guide

A powerful Python MCP (Model Context Protocol) server for programmatic interaction with Aseprite, featuring enhanced error handling, configuration management, batch processing, and more!

🚀 What's New in v2.0

• 🛡️ Comprehensive Error Handling: Custom exceptions with detailed, actionable error messages
• 🔧 Configuration Management: Pydantic-based settings with JSON/YAML support
• 📝 Advanced Logging: Structured logging with performance metrics
• 🎨 Palette Management: Create, apply, and extract color palettes
• ⚡ Batch Processing: Process multiple files in parallel
• 🏗️ Lua Script Builder: Clean, type-safe Lua script generation
• 🔒 Enhanced Security: Input validation and path traversal protection
• 🧪 Full Test Coverage: Comprehensive unit tests

📋 Features

Core Drawing Tools

• Canvas Operations: Create sprites, add layers and frames
• Drawing Tools: Pixels, lines, rectangles, circles, and fill operations
• Export Tools: Export to various formats with scaling and layer support

New Palette Tools (v2.0)

• Preset Palettes: GameBoy, NES, PICO-8, CGA, Monochrome, Sepia
• Custom Palettes: Create and apply custom color schemes
• Palette Extraction: Extract colors from existing images
• Color Remapping: Replace colors throughout sprites

Batch Processing (v2.0)

• Batch Resize: Resize multiple sprites maintaining aspect ratio
• Batch Export: Convert multiple files to different formats
• Batch Palette Apply: Apply palettes to multiple files
• Custom Scripts: Run Lua scripts on file sets

🔧 Installation

Requirements

• Python 3.13+
• Aseprite (must be installed separately)

Claude Desktop Configuration

Using UV (Recommended)

{
  "mcpServers": {
    "aseprite": {
      "command": "/opt/homebrew/bin/uv",
      "args": [
        "--directory",
        "/path/to/aseprite-mcp",
        "run",
        "-m",
        "aseprite_mcp"
      ],
      "env": {
        "ASEPRITE_PATH": "/path/to/aseprite"
      }
    }
  }
}

Using Python

{
  "mcpServers": {
    "aseprite": {
      "command": "python",
      "args": ["-m", "aseprite_mcp"],
      "cwd": "/path/to/aseprite-mcp",
      "env": {
        "ASEPRITE_PATH": "/path/to/aseprite"
      }
    }
  }
}

Install Dependencies

pip install -r requirements.txt

⚙️ Configuration

Environment Variables

export ASEPRITE_PATH="/Applications/Aseprite.app/Contents/MacOS/aseprite"
export ASEPRITE_MCP_LOG_LEVEL="INFO"

Configuration File (config.json)

{
  "aseprite_path": "/path/to/aseprite",
  "canvas": {
    "max_width": 10000,
    "max_height": 10000
  },
  "batch": {
    "max_parallel_jobs": 4,
    "continue_on_error": true
  },
  "log_level": "INFO",
  "security": {
    "allowed_directories": ["/home/user/sprites"],
    "max_file_size": 104857600
  }
}

Configuration File (config.yaml)

aseprite_path: /path/to/aseprite

canvas:
  max_width: 10000
  max_height: 10000
  default_color_mode: RGBA

batch:
  max_parallel_jobs: 4
  continue_on_error: true

log_level: INFO

security:
  allowed_directories:
    - /home/user/sprites
  max_file_size: 104857600

📖 Usage Examples

Basic Drawing Operations

# Create a new sprite
await create_canvas(320, 240, "my_sprite.aseprite")

# Draw pixels
await draw_pixels("my_sprite.aseprite", [
    {"x": 10, "y": 10, "color": "FF0000"},  # Red
    {"x": 11, "y": 10, "color": "00FF00"},  # Green
    {"x": 12, "y": 10, "color": "0000FF"}   # Blue
])

# Draw shapes
await draw_rectangle("my_sprite.aseprite", 50, 50, 100, 80, "FFFF00", fill=True)
await draw_circle("my_sprite.aseprite", 160, 120, 30, "FF00FF", fill=False)
await draw_line("my_sprite.aseprite", 0, 0, 320, 240, "FFFFFF", thickness=2)

# Fill area
await fill_area("my_sprite.aseprite", 100, 100, "00FFFF", tolerance=10)

Layer and Frame Management

# Add a new layer
await add_layer("my_sprite.aseprite", "Background")

# Add animation frames
await add_frame("my_sprite.aseprite", after_frame=0)

Palette Operations

# Apply preset palette
await apply_preset_palette("my_sprite.aseprite", "gameboy")
# Available presets: gameboy, gameboy-pocket, nes, pico-8, cga, monochrome, sepia

# Create custom palette
await create_palette("my_sprite.aseprite", [
    "264653", "2A9D8F", "E9C46A", "F4A261", "E76F51"
])

# Extract palette from image
await extract_palette_from_image("reference.png", max_colors=16)

# Get palette information
await get_palette_info("my_sprite.aseprite")

# Remap colors
await remap_colors("my_sprite.aseprite", {
    "FF0000": "00FF00",  # Red to Green
    "0000FF": "FFFF00"   # Blue to Yellow
})

Export Operations

# Export single file
await export_sprite("my_sprite.aseprite", "output.png", scale=2.0)

# Export with frame range
await export_sprite("animation.aseprite", "frames.gif", frame_range="1-10")

# Export each layer separately
await export_layers("my_sprite.aseprite", "layers/", format="png")

Batch Processing

# Resize multiple sprites
await batch_resize(
    input_dir="sprites/",
    output_dir="sprites_small/",
    scale=0.5,
    file_pattern="*.aseprite"
)

# Export batch to PNG
await batch_export(
    input_dir="sprites/",
    output_dir="exports/",
    format="png",
    scale=2.0
)

# Apply palette to multiple files
await batch_apply_palette(
    input_dir="sprites/",
    palette_file="my_palette.aseprite",
    create_backup=True
)

# Run custom Lua script on multiple files
await batch_process_custom(
    input_dir="sprites/",
    lua_script="app.activeSprite:flatten()",
    output_dir="flattened/"
)

🏗️ Architecture

Project Structure

aseprite-mcp/
├── aseprite_mcp/
│   ├── core/
│   │   ├── commands.py      # Aseprite command execution
│   │   ├── config.py        # Configuration management
│   │   ├── exceptions.py    # Custom exceptions
│   │   ├── logging.py       # Logging system
│   │   ├── lua_builder.py   # Lua script builder
│   │   └── validation.py    # Input validation
│   └── tools/
│       ├── batch.py         # Batch processing
│       ├── canvas.py        # Canvas operations
│       ├── drawing.py       # Drawing tools
│       ├── export.py        # Export functions
│       └── palette.py       # Palette management
├── tests/                   # Unit tests
├── examples/                # Example scripts
└── config.example.yaml      # Configuration example

Error Handling

try:
    result = await create_canvas(-100, 200, "test.aseprite")
except ValidationError as e:
    print(f"Validation failed: {e}")
except AsepriteError as e:
    print(f"Aseprite error: {e}")

Lua Script Builder

from aseprite_mcp.core.lua_builder import LuaBuilder

builder = LuaBuilder()
builder.create_sprite(200, 200)
builder.begin_transaction()
builder.set_color("FF0000")
builder.for_loop("i", 0, 10)
    builder.draw_pixel("i * 10", "i * 10")
builder.end_loop()
builder.end_transaction()
builder.save_sprite("output.aseprite")

script = builder.build()  # Returns clean Lua code

🧪 Testing

Run all tests:

pytest tests/ -v

Run specific test:

pytest tests/test_validation.py -v

Run demo script:

python examples/demo_improvements.py

📝 Logging

Logs include:

• Operation tracking
• Performance metrics
• Error details with context
• Structured JSON output (optional)

Example log:

2024-06-11 10:30:45 - aseprite_mcp - INFO - Operation: create_canvas
2024-06-11 10:30:45 - aseprite_mcp - INFO - Canvas created successfully
2024-06-11 10:30:45 - aseprite_mcp - INFO - Performance: create_canvas took 0.234s

🤝 Contributing

1. Fork the repository
2. Create a feature branch
3. Follow the coding standards:
   • Use type hints
   • Add input validation
   • Include error handling
   • Write unit tests
   • Update documentation
4. Submit a pull request

📄 License

MIT License - see LICENSE file for details

🙏 Credits

• Original implementation: Divyansh Singh
• v2.0 improvements: Enhanced error handling, configuration, batch processing, and more

📚 Additional Resources

• Aseprite API Documentation
• MCP Documentation
• IMPROVEMENTS.md - Detailed v2.0 changes