N8n

n8n

Complete skill for building, managing, and administering n8n workflows.

How to Use This Skill

This skill covers 9 domains. Each has its own reference file with detailed guidance.

Workflow Building (from czlonkowski/n8n-skills)

Additional Domains

Quick Decision: Which Tool to Use

Priority: MCP → Public API → Internal API → CLI → Docker/Infra.

Core Concepts (Quick Reference)

Webhook Data Access

// CRITICAL: webhook data is nested under .body
const data = $input.first().json.body;  // NOT $input.first().json

Code Node Return Format

// MUST return array of {json: {...}} objects
return items.map(item => ({
  json: { ...item.json, processed: true }
}));

Expression Syntax

{{ $json.fieldName }}           // Current item field
{{ $node["NodeName"].json }}    // Another node's output
{{ $now.toISO() }}              // Current timestamp
{{ $env.MY_VAR }}               // Environment variable

Credential Linking (in workflow JSON)

{
  "credentials": {
    "httpHeaderAuth": { "id": "CRED_ID", "name": "My API Key" }
  }
}