WhatsApp Webhooks Complete Guide for Developers (2026)
Webhooks are the heart of any serious WhatsApp product. Without them you fall back to slow polling or miss critical events. This guide shows how to build a reliable receiver with Omdaa API.
Webhook vs polling
Polling asks “anything new?” forever. Webhooks push the event when it happens — lower latency and clearer ops cost.
Core events
messages.upsert— inbound/updated messages.connection.update— session connectivity changes.- Delivery/read events depending on your path.
Healthy endpoint shape
- Accept POST JSON.
- Verify secret/signature when enabled.
- Respond 200 quickly.
- Enqueue work to a worker.
- Process idempotently (dedupe by message id).
Idempotency & retries
Providers may retry. Store processed event IDs. Make sends and CRM writes safe to repeat.
Local testing
Use ngrok/cloudflared HTTPS tunnel, register the URL in Omdaa, send a test message, inspect payloads.
Production monitoring
- Alert on webhook 5xx spikes.
- Alert on session disconnects.
- Track p95 time-to-first-reply.
Frequently Asked Questions
What if my endpoint is slow?
Always ACK fast. Slow handlers cause retries and duplicate processing.
Should I process media in the webhook?
Download/process media in a worker after acknowledging the event.
Where is the Omdaa webhooks product page?
omdaa.com/en/whatsapp-webhooks
Next step: Create a free account at omdaa.com/register, connect a WhatsApp session, and ship your first webhook in minutes. Omdaa API is Free Forever — no platform subscription.