Implementation guides
Build it correctly, not just quickly.
Problem-based guides for developers who need the architecture, working code, failure modes, and production checks around a WhatsApp messaging integration.
Track 01
Authentication
Design OTP flows that keep credentials and verification state server-side.
Track 02
Integration
Use complete Node.js and Python patterns instead of isolated API snippets.
Track 03
Operations
Verify webhooks, diagnose failures, and preserve tenant boundaries.
OTP architecture
How to add WhatsApp OTP to a web application
A beginner-friendly architecture and implementation guide for sending, tracking, and verifying WhatsApp OTP codes from a secure backend.
Node.js integration
WhatsApp API integration with Node.js and TypeScript
Build a server-side Node.js integration for WhatsApp customer messages with environment variables, typed errors, idempotency, and status tracking.
Python integration
WhatsApp API integration with Python
Send WhatsApp OTP or transactional messages from Python with safe environment variables, timeouts, explicit error handling, and delivery tracking.
Webhook security
How to verify WhatsApp delivery webhooks securely
Verify HookMessage webhook signatures with the raw request body, reject replayed timestamps, and process delivery events idempotently.
Error diagnosis
WhatsApp API errors: a practical troubleshooting guide
Diagnose authentication, sender routing, validation, queue, and delivery failures without rotating keys or reconnecting numbers blindly.
Exact endpoint reference