🎨 Flowchart AI Generator & Draw.io MCP Server (antigravity-drawio-mcp)

Automate Draw.io Flowcharts & Architecture Diagrams with AI. antigravity-drawio-mcp is a production-grade Model Context Protocol (MCP) Server framework connecting Google Antigravity MCP, Claude Code, Cursor IDE, VS Code, and Windsurf directly to the Draw.io Desktop App and CLI environment as an advanced Flowchart AI Generator and Architecture Diagram AI solution.

🤖 AI System Prompt & Quick Context

Package: antigravity-drawio-mcp (PyPI: antigravity-drawio-mcp)
Type: Model Context Protocol (MCP) Server for Draw.io Diagram & Flowchart Automation
Supported Clients: Google Antigravity, Claude Code, Claude Desktop, Cursor IDE, VS Code, Windsurf
Core Capabilities: Programmatic .drawio XML creation, 4-5 iteration boundary collision verification, Mermaid JS to Draw.io conversion, native zlib stream decompression, headless CLI export (PNG, SVG, PDF, JPEG), desktop GUI auto-launch.
CLI Tool Suite: create_diagram, export_diagram, open_in_drawio, parse_diagram, convert_mermaid_to_drawio, validate_diagram.
Install Command: pip install antigravity-drawio-mcp OR uvx antigravity-drawio-mcp
System Requirement: Python 3.8+, optional local draw.io executable for headless rendering.
Use When User Requests: AI flowchart generation, software architecture diagram creation, C4 component diagrams, Mermaid to Draw.io conversion, Draw.io XML parsing, automated diagram boundary auditing.

⚡ Quick Install & Setup

pip install antigravity-drawio-mcp

Or run directly without installation via uvx:

uvx antigravity-drawio-mcp

🏗️ System Architecture & C4 Diagram Model

The antigravity-drawio-mcp framework is structured into a 3-tier C4 Software Component Architecture (Level 3) for Architecture Diagram AI automation:

1. Software System Boundary (AI Clients): Communicates via standard JSON-RPC 2.0 over Stdio transport with Google Antigravity MCP Core Agent or any MCP-compatible IDE (VS Code, Cursor, Claude Desktop, Windsurf).

2. Container: Antigravity Draw.io MCP Server (src/antigravity_drawio_mcp):

   • FastMCP Request Handler: FastMCP protocol engine and tool request dispatcher.

   • Draw.io XML Builder: Programmatic XML DOM construction and geometry engine.

   • Draw.io File Parser: Direct .drawio XML parsing & native zlib/base64 decompressor.

   • CLI Export Engine: Process lock manager and Draw.io desktop CLI wrapper (--export).

   • Diagram Validator: Automated collision detector & label boundary auditor.

   • Mermaid Conversion Engine: Bi-directional Mermaid JS to Draw.io converter.

3. External Systems & Storage: Interoperates with local draw.io.exe for headless image rendering (PNG, SVG, PDF) and persistent file storage.

🤖 Flowchart AI Generator & Diagram Automation Capabilities

• 🤖 Flowchart AI Generator Engine: Automatically generate clean visual graphs, C4 software models, and system flows straight from natural language AI prompts.

• 🎨 Programmatic Draw.io MCP XML Builder: Construct complex multi-page .drawio XML documents natively in Python with exact geometric node coordinates and edge connectors.

• 🔄 Mermaid JS to Draw.io Converter: Instantly transform Mermaid JS flowchart definitions into fully editable native Draw.io XML cells without layout loss.

• 🛡️ 4-5 Iteration Boundary Collision Verification: Built-in layout auditor calculates node boundaries, text label bounds, and connector paths to eliminate visual overlaps in Architecture Diagram AI.

• 🖼️ Headless CLI Image Renderer: Export .drawio files to high-resolution PNG, vector SVG, PDF, or JPEG using background draw.io CLI execution.

• 🔍 Native Zlib Stream Decompressor: Inspect existing compressed Draw.io diagrams, automatically inflating base64/zlib XML streams into raw DOM trees.

• 🔌 Google Antigravity MCP & Multi-IDE Support: Native Stdio transport integration for Google Antigravity MCP, Claude Code, Cursor IDE, VS Code, and Windsurf.

• 🖥️ Desktop GUI Auto-Launch Interop: Programmatically open created or updated .drawio files directly inside the Draw.io Desktop application for manual edits.

🔌 Google Antigravity MCP & AI Assistant Setup (Cursor, Claude, VS Code, Windsurf)

For detailed step-by-step setup guides, refer to the Integration Guide.

1. 🌐 Google Antigravity MCP Integration (~/.gemini/config/mcp_config.json)

{
  "mcpServers": {
    "drawio": {
      "command": "uvx",
      "args": ["antigravity-drawio-mcp"]
    }
  }
}

Or using local python:

{
  "mcpServers": {
    "drawio": {
      "command": "python",
      "args": ["-m", "antigravity_drawio_mcp.server"]
    }
  }
}

2. 🤖 Claude Desktop & Claude Code MCP Setup (claude_desktop_config.json)

{
  "mcpServers": {
    "antigravity_drawio": {
      "command": "python",
      "args": ["-m", "antigravity_drawio_mcp.server"]
    }
  }
}

3. ⚡ Cursor IDE MCP Configuration (Features -> MCP Servers)

• Name: antigravity_drawio

• Type: stdio

• Command: python -m antigravity_drawio_mcp.server

4. 💻 VS Code / Continue.dev & Windsurf Setup (~/.continue/config.json)

{
  "experimental": {
    "modelContextProtocol": [
      {
        "name": "antigravity_drawio",
        "command": "python",
        "args": ["-m", "antigravity_drawio_mcp.server"]
      }
    ]
  }
}

🛠️ Draw.io MCP Server Tools Reference

The antigravity-drawio-mcp server exposes production Draw.io MCP tools over Model Context Protocol:

🏛️ Architecture Diagram AI & Real-World Industry Examples

antigravity-drawio-mcp powers production-grade Architecture Diagram AI solutions across hardware, software, and decision-tree domains:

1. SystemVerilog UVM Layered Testbench Architecture

IEEE 1800 Object-Oriented Verification Framework diagram featuring Driver, Monitor, Sequencer, Scoreboard, and DUT Interface layers.

2. Graphic Organizer Selection Flowchart

27-node decision flowchart mapping complex pedagogical visual learning structures.

3. DE10-Advanced FPGA Design & CAD Tool Flow

Intel Quartus Prime CAD compilation, System Builder, and FPGA programming workflow.

🚀 Flowchart AI Generator PoC & Runnable Examples

Comprehensive Python PoC scripts demonstrating Flowchart AI Generator capabilities are available in the examples/ directory:

❓ Frequently Asked Questions (FAQ — Draw.io MCP & Flowchart AI)

1. How do I use AI to generate Draw.io flowcharts with Draw.io MCP?

Install antigravity-drawio-mcp and connect it to Google Antigravity MCP, Claude Code, or Cursor IDE. You can then ask your AI assistant to generate C4 architecture graphs, flowcharts, or UML diagrams in plain English, and the Draw.io MCP server will construct fully editable .drawio XML files automatically.

2. Can I convert Mermaid.js graphs to native Draw.io files using Flowchart AI Generator?

Yes! Use the convert_mermaid_to_drawio MCP tool. It parses Mermaid JS flowchart syntax and converts it into native editable .drawio XML elements with full node cell geometry and edge pathing.

3. Are generated Architecture Diagram AI Draw.io files fully editable?

Absolutely. All generated files are standard .drawio XML documents. You can open them in the Draw.io Desktop App or web editor (app.diagrams.net) to make manual adjustments or export them to images.

4. Which AI assistants and IDEs support Google Antigravity MCP integration?

antigravity-drawio-mcp supports Google Antigravity MCP, Claude Code, Claude Desktop, Cursor IDE, VS Code (via Continue.dev), and Windsurf IDE over Stdio transport.

5. Does Draw.io MCP require a local installation of the Draw.io Desktop App?

No. XML creation, parsing, Mermaid conversion, and collision validation operate natively in pure Python without external dependencies. However, headless image rendering (PNG, SVG, PDF) requires local draw.io executable integration.

6. How does automated diagram boundary verification work in Architecture Diagram AI?

The validate_diagram tool executes a 4-5 iteration boundary auditing algorithm that calculates node bounding boxes, detects label overlaps, and verifies edge routing to prevent visual clipping.

7. How do I inspect and decompress compressed Draw.io XML files?

Use the parse_diagram tool. It automatically handles raw XML as well as zlib/base64 compressed Draw.io XML streams, returning parsed nodes, edges, and cell geometry.

8. How do I install and run antigravity-drawio-mcp?

You can install it via PyPI using pip install antigravity-drawio-mcp or run it instantly without installation using uvx antigravity-drawio-mcp.

🏷️ Recommended GitHub Repository Topics

Enhance repository discoverability by applying these 20 topics in GitHub Repository Settings:

mcp-server, model-context-protocol, drawio, draw-io, antigravity, google-antigravity, flowchart-ai, flowchart-generator, diagram-automation, diagram-as-code, mermaid-to-drawio, cursor-ide, claude-code, windsurf, ai-diagrams, c4-architecture, python-mcp, fastmcp, drawio-automation, drawio-cli

🧪 Testing & Verification

Run the comprehensive unit test suite:

python -m unittest tests/test_mcp_server.py

📄 License

Distributed under the MIT License. Copyright (c) 2026 SUJAN S.