Dual Authentication Modes

WAPI Engine — Multi-Device WhatsApp REST API Gateway, Auto-Responder & SaaS Script

WAPI Engine is a state-of-the-art, multi-device WhatsApp REST API Gateway and SaaS management platform built on Node.js, Baileys WebSocket engine, React Vite, and Supabase PostgreSQL. Designed for developers, agencies, digital marketers, and SaaS entrepreneurs, WAPI Engine allows you to host your own high-speed WhatsApp API service. Connect WhatsApp accounts seamlessly using either instant **QR Code scanning** or **8-Digit Phone Pairing Codes**. Send text messages, images, documents, audio, videos, stickers, location pins, contact cards, and interactive polls via standard HTTP REST endpoints from any programming language (PHP, Python, Node.js, C#, cURL, or mobile apps). With built-in **Bulk Campaign Scheduling**, **Auto-Responder Keyword Bots**, **Status Saver Interception**, **Webhooks Engine**, **Subscription Tier Management**, and **UPIGateway.dev Real Payment Processing**, WAPI Engine gives you a complete turnkey SaaS business out of the box.