https://n8n-cg6a.onrender.com

https://github.com/Sangram03/N8N/blob/main/Rule%20zFor%20used.md

https://github.com/Sangram03/N8N/blob/main/CreateYourOwnN8N.md

n8n (node-n-node) is an open-source workflow automation tool that allows you to connect apps, APIs, databases, and AI tools without writing full code.

It is similar to Zapier, Make.com, but more powerful because:

• Completely free & open-source
• You can self-host
• Supports JavaScript functions
• Connects to APIs, databases, webhooks, triggers

You create workflows using nodes (blocks).

Here are the core building blocks:

Start the workflow automatically.

Examples:

• Webhook Trigger
• Cron Trigger
• Gmail Trigger
• Discord Trigger
• Schedule trigger

Perform tasks like:

• Send email
• Insert DB entries
• Fetch API
• If condition
• Split data
• Merge data

Secure login info for apps:

• API keys
• OAuth tokens
• Database credentials

This runs your workflow step by step.

Drag-and-drop interface where you design workflows.

Stores:

• workflows
• credentials
• execution history

(Default = SQLite, but supports Postgres/MySQL)

• Built in Vue.js
• Displays nodes, connections, history
• Sends workflow design changes → backend

• Executes workflows
• Handles triggers
• Stores credentials securely
• Runs node logic (API calls, functions, automation steps)

• Webhooks
• Cron jobs
• Event triggers (Gmail, Slack, GitHub etc.)

Used in production to run workflows parallelly.

Used when scaling horizontally.

Stores:

• workflows
• execution logs
• users
• credentials (encrypted)

n8n interacts with:

• APIs
• Databases
• SaaS tools (Gmail, Stripe, GitHub)
• AI/LLMs (OpenAI, Gemini, Claude)
• Custom scripts

1. Trigger activates Example: webhook receives data.

2. Backend receives event n8n engine starts workflow execution.

3. Node 1 executes Node runs API/database/logic.

4. Node passes output to next node Every node receives JSON input and returns JSON output.

5. Continue until last node Task completed.

6. Execution log saved You can view executions later.

There are 3 major ways to run n8n:

• Easiest
• Fully managed

Most popular.

Architecture:

User → Browser (UI)
        |
        v
Nginx → n8n Server → Redis (optional)
                      |
                      v
                    Database (Postgres)

Used by big companies.

Here is a short summary you can use:

n8n is an open-source, node-based workflow automation platform. It connects APIs, databases, and services using triggers and nodes. It has a modular architecture including UI editor, workflow engine, triggers, worker processes, and database storage. Workflows execute step-by-step with JSON data passing between nodes. It supports self-hosting, API integration, and scale-out processing using Redis + multiple workers.

I can create a full PNG diagram showing:

• Nodes
• Trigger
• Engine
• Database
• Workers
• API flow

Just tell me:

“Make a clean n8n architecture diagram for my notes” or “Create a workflow diagram for n8n automation.”