n8n Workflow Automation Code Examples

Production-ready code examples for n8n workflow automation platform.

Files

n8n_custom_node.ts

TypeScript custom node development patterns:

• CustomNode class - Programmatic style with full control (Complexity: 3-4)
• operations and router - Declarative style for CRUD operations (Complexity: 2)
• customApiCredentials - Credential configuration
• validateCredentials() - Credential testing
• PollingTrigger class - Polling trigger with state management (Complexity: 4-5)
• Development workflow commands reference

Complexity: 2-5 depending on pattern

n8n_workflow_examples.js

JavaScript Code node patterns for workflows:

• basicTransformation() - Simple data mapping (Complexity: 1)
• filterData() - Item filtering (Complexity: 1)
• aggregateData() - Grouping with Lodash (Complexity: 2)
• enrichWithAPI() - Async API enrichment (Complexity: 2)
• transformWithErrorHandling() - Try/catch patterns (Complexity: 2)
• handlePagination() - API pagination handler (Complexity: 3)
• processWebhook() - Webhook response formatting (Complexity: 2)
• prepareBatchInsert() - Database batch operations (Complexity: 2)
• validateInputData() - Input validation (Complexity: 2)
• apiCallWithContext() - Error context logging (Complexity: 3)
• checkBeforeCreate() - Idempotency patterns (Complexity: 2)
• initializeAgentState(), updateAgentState() - AI agent state management (Complexity: 3)
• Data access pattern examples (expressions reference)

Complexity: 1-3

n8n_deployment.yaml

Deployment and configuration examples:

• docker-compose.yaml - Standard deployment with PostgreSQL
• docker-compose.queue.yaml - Queue mode for high-volume workloads
• Environment variable reference (essential and performance tuning)
• Resource requirements by volume
• Nginx reverse proxy configuration
• Monitoring and backup strategies
• Development vs Production setup

Complexity: 2-3

Usage

All examples are production-ready patterns with proper error handling and best practices. Copy/modify for your specific workflow needs.

Reference format in SKILL.md:

[See Code Examples: examples/n8n_custom_node.ts]
[See: `CustomNode` class in examples/n8n_custom_node.ts]

Available Libraries

JavaScript Code Node:

• Node.js built-ins: fs, path, crypto, https
• Lodash: _.groupBy(), _.sortBy(), _.uniq(), etc.
• Luxon: DateTime manipulation
• n8n helpers: $input, $json, $binary, this.helpers

Python Code Node:

• Standard library: json, datetime, re, requests
• NumPy: Array operations
• Pandas: Data analysis (if installed)
• _input: Access to input items

Last Updated: 2025-11-14 Purpose: Compliance with CLAUDE.md documentation standards (no inline code blocks >50 lines)