iflow-mcp_angrysky56_mcp-diagram-server 0.1.0
MCP server for creating and manipulating Mermaid diagrams and charts
Requires Python: >=3.10
Keywords: diagrams, flowchart, mcp, mermaid, mindmap, visualization

# MCP Diagram Server 📊

A powerful Model Context Protocol (MCP) server for creating, manipulating, and managing Mermaid diagrams with **automatic saving** and **integrated multi-format support**. Built with enterprise-grade persistence and designed for seamless AI workflow integration.

## 🌟 Key Features

### 🔄 **Automatic Saving & Library System**
- **Auto-save on creation/modification** - Never lose your work
- **Persistent diagram library** stored in `/diagrams` directory
- **Metadata tracking** with creation/modification timestamps
- **Instant load from disk** - Diagrams persist across sessions

### 📁 **Integrated Multi-Format Support**
- **JSON** → Flowcharts (hierarchical structure visualization)
- **CSV** → Organizational/Relationship charts
- **Python Code** → Class diagrams (automatic AST parsing)
- **Markdown** → Mind maps (hierarchical content mapping)
- **Plain Text** → Structured diagrams (with indentation detection)

### 🎨 **Rich Diagram Types**
- **Flowcharts** - Process flows and decision trees
- **Sequence Diagrams** - Interaction sequences
- **Mind Maps** - Concept organization and brainstorming
- **Gantt Charts** - Project timelines and scheduling
- **Class Diagrams** - Object-oriented system design
- **Entity Relationship** - Database schema visualization
- **User Journey Maps** - Experience flow mapping
- **Git Graphs** - Version control visualization
- **Pie Charts** - Data visualization
- **State Diagrams** - State machine modeling

### 🛠 **Professional Tools**
- **Template Library** with 8+ pre-built diagram templates
- **Custom save locations** in addition to auto-saving
- **Smart format detection** with conversion recommendations
- **Resource access** for MCP integration
- **Background processing** with robust task management

Note: If there is a syntax error converting a diagram remove any () in the underlined code error.

![alt text](image-1.png)

![alt text](image-2.png)

![alt text](image-3.png)

## 🚀 Quick Start- Simply clone the repository and add the following

### Claude Desktop Configuration

Add to your Claude Desktop MCP configuration:
```json
{
  "mcpServers": {
    "diagram-server": {
      "command": "uv",
      "args": [
        "--directory",
        "/your-path-to/mcp-diagram-server",
        "run",
        "main.py"
      ],
      "env": {
        "LOG_LEVEL": "INFO"
      }
    }
  }
}
```

### Installation- will auto-install with config

1. Clone the repository:
```bash
cd /mcp-diagram-server
```

2. Set up the Python environment:
```bash
uv venv --python 3.12 --seed
source .venv/bin/activate
uv add -e .
```

3. Optional - Install Playwright for rendering:
```bash
uv add playwright
uv run playwright install chromium
```

## 📚 Available MCP Tools

### Core Diagram Operations
- `create_diagram` - Create new diagrams with optional templates
- `update_diagram` - Modify existing diagram content (**auto-saves**)
- `get_diagram` - Retrieve diagrams from memory or disk
- `list_diagrams` - Browse your diagram library
- `delete_diagram` - Remove diagrams from memory

### Format Conversion Tools
- `convert_format_to_diagram` - Universal format converter with auto-detection
- `json_to_flowchart` - Convert JSON structures to flowcharts
- `csv_to_org_chart` - Convert CSV data to organizational/relationship charts
- `python_to_class_diagram` - Convert Python code to class diagrams
- `markdown_to_mindmap` - Convert structured markdown to mind maps
- `detect_file_format` - Smart format detection with conversion recommendations

### Library Management
- `save_diagram` - Manual save to custom locations
- `list_templates` - Browse available diagram templates
- **Auto-saving** - Automatic persistence (always active)

## 💡 Usage Examples

### Universal Format Conversion
```
convert_format_to_diagram(
    content='{"api": {"users": ["get", "post"], "orders": ["get", "create"]}}',
    target_type="flowchart",
    name="APIStructure"
)
```
**Result**: Auto-saved flowchart showing API structure hierarchy

### JSON to Flowchart
```
json_to_flowchart(
    json_content='{"system": {"frontend": "React", "backend": "FastAPI", "db": "PostgreSQL"}}',
    name="SystemArchitecture"
)
```
**Result**: Visual flowchart of system components and relationships

### CSV to Organizational Chart
```
csv_to_org_chart(
    csv_content="Name,Role,Department\nAlice,Director,Engineering\nBob,Engineer,Engineering",
    name="TeamStructure"
)
```
**Result**: Organizational chart showing team hierarchy

### Python Code to Class Diagram
```
python_to_class_diagram(
    python_code='''
class DatabaseManager:
    def __init__(self):
        self.connection = None
    def connect(self):
        pass
    def query(self, sql):
        pass
''',
    name="DatabaseDesign"
)
```
**Result**: UML class diagram from Python code structure

### Smart Format Detection
```
detect_file_format(
    content='class User:\n    def __init__(self):\n        pass',
    filename="models.py"
)
```
**Result**: Format identification with conversion recommendations

### Create with Template
```
create_diagram(diagram_type="sequence", use_template=True, name="UserFlow")
```
**Result**: Auto-saved sequence diagram template ready for customization

## 🔧 Understanding Save Systems

### Auto-Save (Always Active)
- **When**: Every diagram creation and modification
- **Where**: `/diagrams` directory with metadata
- **Format**: `.mmd` file + `_metadata.json`
- **Purpose**: Prevent data loss, maintain library

### Manual Save (`save_diagram`)
- **When**: On-demand via tool call
- **Where**: Custom locations you specify
- **Format**: `.mmd` file + `_metadata.json`
- **Purpose**: Backups, exports, custom workflows

**Both systems work together** - Auto-save maintains your library while manual save provides flexibility.

## 📁 Library Structure

```
diagrams/
├── SystemArchitecture_converted_20250824_120000.mmd
├── SystemArchitecture_converted_20250824_120000_metadata.json
├── TeamStructure_converted_20250824_130000.mmd
├── TeamStructure_converted_20250824_130000_metadata.json
├── UserFlow_diagram_20250824_140000.mmd
└── UserFlow_diagram_20250824_140000_metadata.json
```

## 🎯 Format Conversion Pipeline

The integrated conversion system handles multiple input formats:

### **JSON Processing**
- **Auto-detects** nested JSON structures
- **Generates** hierarchical flowcharts showing data relationships
- **Preserves** key-value relationships and array structures

### **CSV Analysis**
- **Parses** CSV headers and relationships
- **Creates** organizational charts or network diagrams
- **Handles** employee/role data and relationship matrices

### **Python AST Parsing**
- **Analyzes** Python source code structure
- **Extracts** classes, methods, and inheritance relationships
- **Generates** UML class diagrams with method signatures

### **Plain Text Intelligence**
- **Detects** indentation patterns and structure
- **Converts** to hierarchical mind maps
- **Processes** bullet points and numbered lists

### **Smart Detection**
- **Content analysis** for format identification
- **File extension** recognition when available
- **Conversion recommendations** for optimal diagram types

## 🛡️ Enterprise Features

- **Robust Error Handling**: Comprehensive exception management
- **Process Management**: Background task cleanup and monitoring
- **Data Integrity**: Metadata validation and consistency checks
- **Session Persistence**: Diagrams survive server restarts
- **Format Validation**: Input validation for all supported formats
- **Concurrent Access**: Safe multi-client diagram access

## 🔄 Workflow Integration

Perfect for:
- **AI-Powered Diagramming**: Let AI create and modify diagrams from any format
- **Documentation Generation**: Convert data structures to visual documentation
- **Process Visualization**: Transform workflows into clear diagrams
- **Code Architecture**: Generate system diagrams from source code
- **Data Visualization**: Convert CSVs and JSON to visual representations
- **Knowledge Mapping**: Convert any structured content to mind maps

## 📝 License

MIT License - See LICENSE file for details

## 🤝 Contributing

Contributions welcome! The codebase follows modern Python patterns with comprehensive error handling and robust process management.

## 🙏 Acknowledgments

- Inspired by [Drawnix](https://drawnix.com) - Open-source whiteboard tool
- Built with [FastMCP](https://github.com/modelcontextprotocol/python-sdk)
- Powered by [Mermaid](https://mermaid.js.org) diagram syntax
- Format conversion powered by Python AST parsing and intelligent structure analysis

## 📞 Support

For issues or questions, please open an issue on GitHub.

---

**System Requirements**: Python 3.10+ | Compatible with Claude Desktop and MCP-enabled clients

**🚀 Ready to convert any format to diagrams? Start creating visual representations from JSON, CSV, Python code, and more with automatic saving!**