WhatsApp Message Node Not Sending Reply – No Error in Workflow

[A2P_Energy]

Hi Support Team,

I’m facing an issue with my n8n workflow that uses the WhatsApp integration.
The workflow triggers correctly and the AI Agent generates a proper response, but the “Send WhatsApp Message” node does not send any reply back to the user.
There are no errors showing in the execution log — the workflow completes successfully, but no message is delivered.

Here are the details:

• The trigger node receives incoming WhatsApp messages successfully.

• The AI Agent node returns valid text output.

• The “Send WhatsApp Message” node executes without any error.

• No outgoing message is received on WhatsApp.

I’ve verified that credentials and mapping fields are correct.
Could you please check if there is any known issue with the WhatsApp integration or guide me on how to debug silent message delivery failures?

[tridi]

Hi there, The WhatsApp Cloud API has a rule for the ‘Send Message’ action: it can only be performed if you have already interacted with the target WABA number (the ‘24-hour conversation window’ rule). If you haven’t, or if you are targeting a number without a previous interaction, then you must use the ‘Send Template’ action.

if you already have an active WhatsApp webhook in your workflow, you can check for status events there. WhatsApp always sends a status update, even when your message is sent successfully but has not yet been delivered to the target user.