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n8n

Visual workflow builder with custom Sei nodes

n8n is a powerful workflow automation tool with 500+ integrations plus custom Sei Network nodes for blockchain operations.

Overview​

  • URL: http://localhost:5001
  • Image: n8nio/n8n:latest
  • Purpose: Workflow automation and agent orchestration
  • Status: Always enabled

Features​

  • 500+ Integrations: APIs, databases, services
  • Custom Sei Nodes: 5 blockchain-specific nodes
  • Visual Editor: Drag-and-drop workflow builder
  • Scheduling: Cron-based triggers
  • Webhooks: HTTP endpoint triggers
  • Database Integration: PostgreSQL, Redis, Neo4j support

Configuration​

Basic Setup​

N8N_PORT=5001
POSTGRES_PASSWORD=seiling123

Optional Settings​

N8N_ENCRYPTION_KEY=seiling-encryption-key
N8N_USER_MANAGEMENT_JWT_SECRET=seiling-jwt-secret

Usage​

First Time Setup​

  1. Open http://localhost:5001
  2. Create admin account
  3. Explore workflow templates

Custom Sei Nodes​

Install custom Sei Network nodes:

  1. Settings → Community Nodes
  2. Install Package: n8n-nodes-sei
  3. Available Nodes:
    • Sei Wallet: Balance, transactions
    • Sei Contract: Smart contract interactions
    • Sei Query: Blockchain queries
    • Sei Send: Token transfers
    • Sei Stake: Staking operations

Import Templates​

  1. Templates → Import
  2. Select from resources/n8n/
  3. Configure credentials
  4. Test workflow

Available Templates​

From resources/n8n/:

  • Sei MCP Agent Example: Basic blockchain operations
  • Cambrian Agent Demo: DeFi automation
  • Seiling Buidlbox Full Demo: Complete system integration
  • Sei Multi-Agent System: Advanced agent coordination

Common Workflows​

API Integration​

HTTP Trigger → Process Data → Database Store → Notification

Blockchain Automation​

Schedule → Check Wallet → Execute Trade → Log Results

Agent Coordination​

Webhook → Call AI Agent → Process Response → Action

Troubleshooting​

Common Issues​

Can't access n8n:

# Check service
docker logs seiling-n8n

# Check database connection
docker logs seiling-postgres

Workflow failures:

  • Check node configurations
  • Verify API credentials
  • Test individual nodes
  • Review execution logs

Database errors:

# Check PostgreSQL health
docker exec seiling-postgres pg_isready -U postgres

# Restart n8n
docker restart seiling-n8n

Health Check​

# n8n health endpoint
curl http://localhost:5001/healthz

# Service logs
docker logs seiling-n8n --tail=50

Integration​

With Seiling Services​

  • Sei MCP Server: Blockchain operations
  • ElizaOS: AI agent calls
  • Cambrian: Multi-modal agents
  • PostgreSQL: Data storage
  • OpenWebUI: Chat triggers

External APIs​

  • OpenAI: AI processing
  • Webhook services: External triggers
  • Databases: Various database systems
  • Cloud services: AWS, Google, Azure

n8n is the automation backbone. Use it to orchestrate complex workflows and agent interactions.