WhatsApp Automation

👤 Author: Prathmesh Batane 📅 Updated: February 2026 🛠️ Stack: Node.js / Puppeteer

Two Ways We Send Messages

Our system is designed for both speed and safety. We have two distinct paths depending on whether you need a message sent Right Now or in Bulk.

Single / Instant Send

Think of this like an Express Courier. Used for critical data that cannot wait.

  • Usage: Bill Invoices, Login OTPs, Alerts.
  • Speed: Sent immediately (1-3 seconds).
  • Logic: Direct API call to the WhatsApp Client.

Bulk / Marketing Send

Think of this like a Sorting Office. Used for reaching thousands safely.

  • Usage: Marketing Promos, Festival Wishes.
  • Speed: Controlled Drip-Feed (30s intervals).
  • Logic: Background Queue + Anti-Ban logic.

How It Works (For Beginners)

Don't worry about the complex code—here is the simple journey of a message from your screen to the customer's phone.

                graph TD
                    A[Frontend: You type message] -->|POST Request| B[Backend: Receive Data]
                    B --> C{Which Type?}
                    C -->|Single| D[Instant Send: 1-3s]
                    C -->|Bulk| E[Save to Queue Database]
                    E --> F[Background Service Loop]
                    F --> G[Wait 30 Seconds]
                    G --> H[Human Simulation: Typing...]
                    H --> I[Send Message]
                    I -->|More Left?| F
                    I -->|All Done| J[Finish Campaign]
                    
                    style D fill:#22d3ee,stroke:#fff,color:#000
                    style H fill:#facc15,stroke:#fff,color:#000
                    style I fill:#10b981,stroke:#fff,color:#000
                

Powering the Engine

We use industry-standard libraries to ensure compatibility and reliability.

Node.js (Backend Runtime)
Express (API Framework)
MongoDB (Database for Queue)
Puppeteer (Browser Engine)
WhatsApp-Web.js (WA Wrapper)

Why Puppeteer?

WhatsApp doesn't have a public API for everything. We use Puppeteer (a headless browser) to run a hidden instance of WhatsApp Web on the server. This allows us to sync with your actual phone session using a QR code.

Bulletproof Protection

WhatsApp hates bots. To keep your account from being banned, we built "Human Simulation" logic directly into the code.

The Typing Effect

Before every message, the server shows "Typing..." in the chat window for 3 to 6 seconds. This looks natural to WhatsApp's security systems.

The Drip-Feed

We never send 100 messages at once. We send one, then wait for a random amount of time (20 to 50 seconds) before the next one.

Batch Cooling

After reaching 20 messages, the system takes a "Coffee Break" for 5 minutes. This ensures no high-speed activity triggers a ban.

Reliable & Scalable

Whether you're sending one invoice or 5,000 marketing messages, our architecture handles it with ease. By segregating Instant and Queued flows, we ensure stability even under heavy load.

Disclaimer

The architectural patterns, diagrams, and logic described in this guide represent a conceptual flow and core technical idea only.

Educational Purpose

This documentation is intended for informational and educational purposes to demonstrate automation logic. It is not a complete, "plug-and-play" production system.

Implementation

All coding, security hardening, and final implementation must be performed independently by the developer. You are responsible for the accuracy and integrity of your own code.

User Responsibility

Usage of automation tools is at your own risk. The author is not liable for any account bans, data loss, or damages resulting from the use or misuse of these concepts.