n8n Architect MCP Server
Enables orchestration and management of n8n workflows through tools for creating, updating, diagnosing failed executions, auto-fixing workflows, and installing community nodes.
README
n8n Architect MCP Server
Production-grade MCP server for n8n workflow orchestration.
Features
- Smart Upsert: Create or update workflows by name
- Deep Diagnostics: Analyze failed executions with detailed error extraction
- Package Management: Install community nodes via npm
- Auto-Fix: Composite tool to diagnose and patch failing workflows
Quick Start
Windows
start_server.bat
Manual Setup
# Create virtual environment
python -m venv venv
# Activate (Windows)
venv\Scripts\activate
# Install dependencies
pip install -r requirements.txt
# Run server
python run.py
Configuration
Create a .env file:
N8N_API_KEY=your_api_key_here
N8N_BASE_URL=http://localhost:5678/api/v1
N8N_EDITOR_URL=http://localhost:5678
N8N_DATA_DIR=~/.n8n
API_HOST=0.0.0.0
API_PORT=8000
DEBUG=false
Available Tools
| Tool | Description |
|---|---|
list_all_workflows |
List workflows with optional tag filter |
deploy_workflow |
Smart Upsert: create or update by name |
read_workflow_structure |
Get full workflow JSON |
diagnose_execution |
Deep dive into failed execution |
auto_fix_workflow |
Diagnose + patch in one call |
install_community_node |
Install npm packages |
toggle_workflow_state |
Activate/deactivate workflows |
delete_workflow |
Remove workflows |
API Endpoints
GET /health- Server health checkGET /info- Server configuration
Architecture
app/
├── core/
│ ├── config.py # Pydantic Settings
│ ├── client.py # HTTP Client + error handling
│ └── logging.py # Structured logging
├── models/
│ └── schemas.py # Data contracts
├── services/
│ ├── architect.py # Deploy/Read/Clone
│ ├── debugger.py # Diagnostics
│ ├── manager.py # List/Toggle/Delete
│ └── packages.py # npm management
└── main.py # FastAPI + FastMCP gateway
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