Blueprint
Click on "Install Server".
Wait a few minutes for the server to deploy. Once ready, it will show a "Started" state.
In the chat, type
@followed by the MCP server name and your instructions, e.g., "@Blueprintcreate a C4 context diagram for my e-commerce system"
That's it! The server will respond to your query, and you can continue using it as needed.
Here is a step-by-step guide with screenshots.
Blueprint
An MCP server for generating and visualizing C4 software architecture diagrams.
What is Blueprint?
Blueprint is a Model Context Protocol (MCP) server that enables AI assistants to create C4 architecture diagrams. It provides three tools:
Tool | Purpose |
| Build C4 diagrams from structured element/relationship data |
| Get a structural overview of a project (language, deps, entry points) |
| C4 model documentation (element types, diagram types, relationships) |
Related MCP server: AI Charts
Quick Start
# Create virtual environment
python -m venv .venv
source .venv/bin/activate # or .venv\Scripts\activate on Windows
# Install
pip install -e ".[dev]"
# Run tests
pytest
# Start the MCP server
python -m blueprint.serverMCP Client Configuration
Add to your MCP client settings:
{
"mcpServers": {
"blueprint": {
"command": "python",
"args": ["-m", "blueprint.server"],
"cwd": "/path/to/blueprint"
}
}
}Usage
Create a C4 Context Diagram
The LLM discusses architecture with the user, then calls create_c4_diagram:
{
"diagram_type": "context",
"title": "My System",
"elements": [
{"type": "Person", "alias": "user", "label": "User", "description": "System user"},
{"type": "System", "alias": "app", "label": "My App", "description": "The main application"}
],
"relationships": [
{"source": "user", "target": "app", "label": "Uses", "technology": "HTTPS"}
],
"output_format": "mermaid"
}Scan a Codebase
{
"project_path": "/path/to/project",
"max_depth": 3
}Returns project structure, detected language/framework, dependencies, and entry points.
Output Formats
Mermaid (default) — Renders inline in VS Code, GitHub, and many markdown editors
PlantUML — Full C4-PlantUML macro support, requires external renderer
Development
# Install with dev dependencies
pip install -e ".[dev]"
# Run tests
pytest
# Run tests with verbose output
pytest -vLicense
MIT
Maintenance
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