RAILWAY_DEPLOYMENT.md

Railway Deployment Guide for n8n-MCP

Deploy n8n-MCP to Railway's cloud platform with zero configuration and connect it to Claude Desktop from anywhere.

🚀 Quick Deploy

Deploy n8n-MCP with one click:

📋 Overview

Railway deployment provides:

• ☁️ Instant cloud hosting - No server setup required
• 🔒 Secure by default - HTTPS included, auth token warnings
• 🌐 Global access - Connect from any Claude Desktop
• ⚡ Auto-scaling - Railway handles the infrastructure
• 📊 Built-in monitoring - Logs and metrics included

🎯 Step-by-Step Deployment

1. Deploy to Railway

1. Click the Deploy button above
2. Sign in to Railway (or create account)
3. Configure your deployment:
   • Project name (optional)
   • Environment (leave as "production")
   • Region (choose closest to you)
4. Click "Deploy" and wait ~2-3 minutes

2. Configure Security

IMPORTANT: The deployment includes a default AUTH_TOKEN for instant functionality, but you MUST change it:

1. Go to your Railway dashboard
2. Click on your n8n-mcp service
3. Navigate to "Variables" tab
4. Find AUTH_TOKEN
5. Replace with secure token:

   # Generate secure token locally:
   openssl rand -base64 32

6. Railway will automatically redeploy with the new token

⚠️ Security Warning: The server displays warnings every 5 minutes until you change the default token!

3. Get Your Service URL

1. In Railway dashboard, click on your service
2. Go to "Settings" tab
3. Under "Domains", you'll see your URL:

   https://your-app-name.up.railway.app
   

4. Copy this URL for Claude Desktop configuration and add /mcp at the end

4. Connect Claude Desktop

Add to your Claude Desktop configuration:

{
  "mcpServers": {
    "n8n-railway": {
      "command": "npx",
      "args": [
        "-y",
        "mcp-remote",
        "https://your-app-name.up.railway.app/mcp",
        "--header",
        "Authorization: Bearer YOUR_SECURE_TOKEN_HERE"
      ]
    }
  }
}

Configuration file locations:

• macOS: ~/Library/Application Support/Claude/claude_desktop_config.json
• Windows: %APPDATA%\Claude\claude_desktop_config.json
• Linux: ~/.config/Claude/claude_desktop_config.json

Restart Claude Desktop after saving the configuration.

🔧 Environment Variables

Default Variables (Pre-configured)

These are automatically set by the Railway template:

Variable	Default Value	Description
AUTH_TOKEN	REPLACE_THIS...	⚠️ CHANGE IMMEDIATELY
MCP_MODE	http	Required for cloud deployment
USE_FIXED_HTTP	true	Stable HTTP implementation
NODE_ENV	production	Production optimizations
LOG_LEVEL	info	Balanced logging
TRUST_PROXY	1	Railway runs behind proxy
CORS_ORIGIN	*	Allow any origin
HOST	0.0.0.0	Listen on all interfaces
PORT	(Railway provides)	Don't set manually
AUTH_RATE_LIMIT_WINDOW	900000 (15 min)	Rate limit window (v2.16.3+)
AUTH_RATE_LIMIT_MAX	20	Max auth attempts (v2.16.3+)
WEBHOOK_SECURITY_MODE	strict	SSRF protection mode (v2.16.3+)

Optional Variables

Variable	Default Value	Description
N8N_MODE	false	Enable n8n integration mode for MCP Client Tool
N8N_API_URL	-	URL of your n8n instance (for workflow management)
N8N_API_KEY	-	API key from n8n Settings → API

Optional: n8n Integration

For n8n MCP Client Tool Integration

To use n8n-MCP with n8n's MCP Client Tool node:

1. Go to Railway dashboard → Your service → Variables
2. Add this variable:
   • N8N_MODE: Set to true to enable n8n integration mode
3. Save changes - Railway will redeploy automatically

For n8n API Integration (Workflow Management)

To enable workflow management features:

1. Go to Railway dashboard → Your service → Variables
2. Add these variables:
   • N8N_API_URL: Your n8n instance URL (e.g., https://n8n.example.com)
   • N8N_API_KEY: API key from n8n Settings → API
3. Save changes - Railway will redeploy automatically

🏗️ Architecture Details

How It Works

Claude Desktop → mcp-remote → Railway (HTTPS) → n8n-MCP Server

1. Claude Desktop uses mcp-remote as a bridge
2. mcp-remote converts stdio to HTTP requests
3. Railway provides HTTPS endpoint and infrastructure
4. n8n-MCP runs in HTTP mode on Railway

Single-Instance Design

Important: The n8n-MCP HTTP server is designed for single n8n instance deployment:

• n8n API credentials are configured server-side via environment variables
• All clients connecting to the server share the same n8n instance
• For multi-tenant usage, deploy separate Railway instances

Security Model

• Bearer Token Authentication: All requests require the AUTH_TOKEN
• HTTPS by Default: Railway provides SSL certificates
• Environment Isolation: Each deployment is isolated
• No State Storage: Server is stateless (database is read-only)

🚨 Troubleshooting

Connection Issues

"Invalid URL" error in Claude Desktop:

• Ensure you're using the exact configuration format shown above
• Don't add "connect" or other arguments before the URL
• The URL should end with /mcp

"Unauthorized" error:

• Check that your AUTH_TOKEN matches exactly (no extra spaces)
• Ensure the Authorization header format is correct: Authorization: Bearer TOKEN

"Cannot connect to server":

• Verify your Railway deployment is running (check Railway dashboard)
• Ensure the URL is correct and includes https://
• Check Railway logs for any errors

Windows: "The filename, directory name, or volume label syntax is incorrect" or npx command not found:

This is a common Windows issue with spaces in Node.js installation paths. The error occurs because Claude Desktop can't properly execute npx.

Solution 1: Use node directly (Recommended)

{
  "mcpServers": {
    "n8n-railway": {
      "command": "node",
      "args": [
        "C:\\Program Files\\nodejs\\node_modules\\npm\\bin\\npx-cli.js",
        "-y",
        "mcp-remote",
        "https://your-app-name.up.railway.app/mcp",
        "--header",
        "Authorization: Bearer YOUR_SECURE_TOKEN_HERE"
      ]
    }
  }
}

Solution 2: Use cmd wrapper

{
  "mcpServers": {
    "n8n-railway": {
      "command": "cmd",
      "args": [
        "/C",
        "\"C:\\Program Files\\nodejs\\npx\" -y mcp-remote https://your-app-name.up.railway.app/mcp --header \"Authorization: Bearer YOUR_SECURE_TOKEN_HERE\""
      ]
    }
  }
}

To find your exact npx path, open Command Prompt and run: where npx

Railway-Specific Issues

Build failures:

• Railway uses AMD64 architecture - the template is configured for this
• Check build logs in Railway dashboard for specific errors

Environment variable issues:

• Variables are case-sensitive
• Don't include quotes in the Railway dashboard (only in JSON config)
• Railway automatically restarts when you change variables

Domain not working:

• It may take 1-2 minutes for the domain to become active
• Check the "Deployments" tab to ensure the latest deployment succeeded

📊 Monitoring & Logs

View Logs

1. Go to Railway dashboard
2. Click on your n8n-mcp service
3. Click on "Logs" tab
4. You'll see real-time logs including:
   • Server startup messages
   • Authentication attempts
   • API requests (without sensitive data)
   • Any errors or warnings

Monitor Usage

Railway provides metrics for:

• Memory usage (typically ~100-200MB)
• CPU usage (minimal when idle)
• Network traffic
• Response times

💰 Pricing & Limits

Railway Free Tier

• $5 free credit monthly
• 500 hours of runtime
• Sufficient for personal use of n8n-MCP

Estimated Costs

• n8n-MCP typically uses: ~0.1 GB RAM
• Monthly cost: ~$2-3 for 24/7 operation
• Well within free tier for most users

🔄 Updates & Maintenance

Manual Updates

Since the Railway template uses a specific Docker image tag, updates are manual:

1. Check for updates on GitHub
2. Update image tag in Railway:
   • Go to Settings → Deploy → Docker Image
   • Change tag from current to new version
   • Click "Redeploy"

Automatic Updates (Not Recommended)

You could use the latest tag, but this may cause unexpected breaking changes.

🔒 Security Features (v2.16.3+)

Railway deployments include enhanced security features:

Rate Limiting

• Automatic brute force protection - 20 attempts per 15 minutes per IP
• Configurable limits via AUTH_RATE_LIMIT_WINDOW and AUTH_RATE_LIMIT_MAX
• Standard rate limit headers for client awareness

SSRF Protection

• Default strict mode blocks localhost, private IPs, and cloud metadata
• Cloud metadata always blocked (169.254.169.254, metadata.google.internal, etc.)
• Use moderate mode only if connecting to local n8n instance

Security Configuration:

# In Railway Variables tab:
WEBHOOK_SECURITY_MODE=strict          # Production (recommended)
# or
WEBHOOK_SECURITY_MODE=moderate        # If using local n8n with port forwarding

# Rate limiting (defaults are good for most use cases)
AUTH_RATE_LIMIT_WINDOW=900000         # 15 minutes
AUTH_RATE_LIMIT_MAX=20                # 20 attempts per IP

📝 Best Practices

1. Always change the default AUTH_TOKEN immediately
2. Use strong, unique tokens (32+ characters)
3. Monitor logs for unauthorized access attempts
4. Keep credentials secure - never commit them to git
5. Use environment variables for all sensitive data
6. Regular updates - check for new versions monthly

🆘 Getting Help

• Railway Documentation: docs.railway.app
• n8n-MCP Issues: GitHub Issues
• Railway Community: Discord

🎉 Success!

Once connected, you can use all n8n-MCP features from Claude Desktop:

• Search and explore 500+ n8n nodes
• Get node configurations and examples
• Validate workflows before deployment
• Manage n8n workflows (if API configured)

The cloud deployment means you can access your n8n knowledge base from any computer with Claude Desktop installed!