Verify Webhook Subscription: Ensure you’ve subscribed to the messages event in the Meta Developer Dashboard. Without this subscription, customer-initiated messages won’t trigger the webhook.

Test Webhook Accessibility: Check that your webhook is publicly accessible and responds with a 200 HTTP status code. Use tools like Postman or Webhook.site to inspect incoming requests.

Customer Opt-In: WhatsApp Cloud API requires that the customer has interacted with your business first. If this hasn’t happened, messages won’t trigger the webhook due to Meta’s privacy policies.

Analyze Logs: Check your webhook server logs to see if requests from WhatsApp servers are reaching your endpoint. Also, inspect the payload structure to ensure correct handling.

Re-Verify Webhook Setup: If everything seems fine, try re-verifying your webhook or re-subscribing to events in the Meta Developer Dashboard.

If you’ve verified all the above and the issue persists, it may be worth contacting Meta Support with detailed logs and examples for further investigation.