Visio MCP Server

What is Visio MCP Server about?

Visio MCP Server enables automation of Visio diagram workflows, allowing scripts to create new files, add and connect shapes, insert text, export images, and perform other common editing tasks without manual UI interaction.

How to use Visio MCP Server?

1. Install Microsoft Visio on a Windows machine.
2. Install required Python packages:

   pip install pywin32
   pip install mcp-server
   

3. Clone the repository and run the server script:

   python visio_mcp_server.py
   

4. Configure the server in your MCP settings (JSON) using the provided command and arguments, or run it via uvx as shown in the README.
5. Send JSON‑formatted API requests to the server endpoints to perform operations such as creating files, adding shapes, connecting shapes, and exporting diagrams.

Key features of Visio MCP Server

• File Management: Create new Visio documents, open existing ones, save, and export to image formats.
• Shape Operations: Add basic shapes (rectangle, circle, line, etc.), position them precisely, and modify dimensions.
• Connector Support: Connect two shapes with dynamic, straight, or curved connectors.
• Text Handling: Insert or update text on any shape.
• Listing & Inspection: Retrieve a list of all shapes with their IDs for further manipulation.
• Future‑ready Architecture: Planned extensions include advanced styling, layer handling, batch operations, custom stencil support, headless execution, and REST/Webhook integrations.

Use cases of Visio MCP Server

• Automated diagram generation for engineering, flowcharts, network topology, or business processes based on data sources.
• Batch updates to large Visio files (e.g., applying company branding or re‑routing connectors).
• Integration with CI/CD pipelines to produce up‑to‑date architecture diagrams from code or infrastructure definitions.
• Educational tools that dynamically create visual examples for tutorials.
• Report generation that includes customized Visio graphics embedded in documents.

FAQ from the Visio MCP Server

Q: Which operating system is required? A: Windows, because the server uses the COM interface to control Visio.

Q: Do I need a specific Visio edition? A: Any installed Microsoft Visio (Professional or Standard) works.

Q: Can I run the server without a visible Visio UI? A: Headless operation is planned for future releases; currently the Visio UI may appear during processing.

Q: How are shape types identified? A: Use the exact shape name (e.g., "Rectangle", "Circle"); unrecognized names fall back to a rectangle.

Q: What should I do if I encounter COM errors? A: Restart any hanging Visio processes, ensure you have sufficient permissions, and verify Visio launches manually.

Visio MCP Server

A MCP server that provides tools for creating and editing Microsoft Visio diagrams programmatically via a standardized API.

Overview

Visio MCP Server allows you to automate Visio diagram creation and editing using Python. It leverages Microsoft's COM interface to control Visio, enabling you to programmatically create diagrams, add shapes, connect them, add text, and more.

Example

Requirements

• Windows operating system
• Microsoft Visio (Professional or Standard) installed
• Python 3.12+
• Python packages:
  • mcp.server
  • win32com.client (pywin32)

Installation

1. Ensure Microsoft Visio is installed on your system
2. Install required Python packages:

pip install pywin32
pip install mcp-server

3. Clone or download this repository
4. Run the server:

python visio_mcp_server.py

Features

The server provides the following functionality:

Creating and Opening Files

• Create new Visio diagrams
• Open existing Visio diagrams

Shape Management

• Add various shapes (Rectangle, Circle, Line, etc.)
• Connect shapes with different connector types
• Add text to shapes
• List all shapes in a document

File Operations

• Save documents to specified locations
• Export diagrams as images
• Close documents safely

MCP Configuration

Option 1: Local Python Server

Add the server to your MCP settings configuration file:

{
  "mcpServers": {
    "ppt": {
      "command": "python",
      "args": ["/path/to/ppt_mcp_server.py"],
      "env": {}
    }
  }
}

Option 2: Using UVX (No Local Installation Required)

If you have uvx installed, you can run the server directly from PyPI without local installation:

{
  "mcpServers": {
    "ppt": {
      "command": "uvx",
      "args": [
        "--from", "office-visio-mcp-server", "visio_mcp_server"
      ]
    }
  }
}

API Reference

Create a Visio File

Creates a new Visio diagram.

{
  "template_path": "[optional] Path to Visio template (.vstx, .vst)",
  "save_path": "[optional] Where to save the file"
}

Example:

{
  "save_path": "C:\\Users\\YourUsername\\Documents\\MyDiagram.vsdx"
}

Open a Visio File

Opens an existing Visio diagram.

{
  "file_path": "Path to the Visio file to open"
}

Add Shape

Adds a shape to a Visio diagram.

{
  "file_path": "Path to the Visio file",
  "shape_type": "Type of shape (Rectangle, Circle, Line, etc.)",
  "x": 1.0,
  "y": 1.0,
  "width": 1.0,
  "height": 1.0
}

Connect Shapes

Connects two shapes in a Visio diagram.

{
  "file_path": "Path to the Visio file",
  "shape1_id": 1,
  "shape2_id": 2,
  "connector_type": "Dynamic, Straight, or Curved"
}

Add Text

Adds text to a shape in a Visio diagram.

{
  "file_path": "Path to the Visio file",
  "shape_id": 1,
  "text": "Text to add to the shape"
}

List Shapes

Lists all shapes in a Visio diagram.

{
  "file_path": "Path to the Visio file"
}

Usage Example

Here's a complete workflow example:

1. Create a new Visio file:

{
  "save_path": "C:\\Diagrams\\FlowChart.vsdx"
}

2. Add a rectangle shape:

{
  "file_path": "C:\\Diagrams\\FlowChart.vsdx",
  "shape_type": "Rectangle",
  "x": 2.0,
  "y": 2.0,
  "width": 1.5,
  "height": 1.0
}

3. Add another shape:

{
  "file_path": "C:\\Diagrams\\FlowChart.vsdx",
  "shape_type": "Circle",
  "x": 5.0,
  "y": 2.0,
  "width": 1.0,
  "height": 1.0
}

4. Get shape IDs:

{
  "file_path": "C:\\Diagrams\\FlowChart.vsdx"
}

5. Connect the shapes:

{
  "file_path": "C:\\Diagrams\\FlowChart.vsdx",
  "shape1_id": 1,
  "shape2_id": 2,
  "connector_type": "Straight"
}

6. Add text to shapes:

{
  "file_path": "C:\\Diagrams\\FlowChart.vsdx",
  "shape_id": 1,
  "text": "Start"
}

Future Features

The following features are planned for future releases:

Enhanced Shape Styling

• Color and fill pattern customization
• Line weight, style, and color options
• Text formatting (font, size, alignment)
• Shadow and 3D effects

Advanced Visio Objects

• Support for layers and pages
• Group creation and manipulation
• Container management
• Text-only shapes and callouts

Template Management

• Template library access
• Custom template creation
• Favorite templates list

Batch Operations

• Bulk shape creation
• Mass formatting changes
• Import from CSV/JSON data sources

Custom Stencil Support

• Loading custom stencils
• Creating and saving custom stencils
• Searching stencil shapes

Diagram Analysis

• Shape relationship analysis
• Path finding between shapes
• Validation against diagram rules

Export Options

• PDF export with options
• SVG export for web use
• PNG/JPG with custom resolution
• Export specific pages or sections

Integration Capabilities

• REST API wrapper
• Webhook support for diagram changes
• Version control integration
• CI/CD pipeline support

Headless Operation

• Server operation without visible Visio UI
• Background diagram processing
• Scheduled operations

Troubleshooting

Common Issues:

1. Visio Not Launching:

   • Ensure Visio is correctly installed and can be opened manually
   • Check that you have sufficient permissions to launch COM applications

2. Template Not Found:

   • The server will create a blank diagram if templates aren't found
   • Specify an absolute path to a template if needed

3. Invalid Shape Type:

   • If a shape type isn't recognized, the server will default to a rectangle
   • Check spelling and case of shape names

4. COM Errors:

   • Restarting Visio manually may help resolve COM interface issues
   • Ensure no existing Visio processes are hanging in Task Manager

License

This project is licensed under the MIT License - see the LICENSE file for details.