Hey n8n team and community,
I’m currently building an AI assistant named Larry using n8n.cloud to serve scaffold training content to end users via a webhook.
The Problem:
The webhook test URL works perfectly. However, when I use the Production URL, I receive a 404 error with this message:
{
“code”: 404,
“message”: “The requested webhook "POST [ID]" is not registered.”,
“hint”: “The workflow must be active for a production URL to run successfully…”
}
What I’ve Already Tried:
- The workflow is 100% active (green toggle on top).
- The Webhook node is set to POST and configured to respond using
Respond to Webhook. - I’m using Postman to send a request (see screenshot below).
- I also tried cURL, but received the same 404 or “Workflow could not be started!” errors.
- I added the
Content-Type: application/jsonheader and a simple JSON message payload{ "message": "Show me a scaffold training file" }.
Workflow Structure:
Webhook → Code → Google Drive / HTTP Request → Respond to Webhook
Environment:
- Using n8n.cloud
- All workflows are saved, tested, and functioning on Test URL
- Production URL matches the POST config
Screenshots:
- Webhook configuration with Production URL active
- Postman sending POST request
- Response error JSON
- Workflow diagram and node connections
(Available here or I can upload if needed.)
Request:
Can someone from the n8n team or community help identify what’s blocking the production webhook from executing properly?
I’m on a tight delivery deadline and have been blocked for a while now. I’d sincerely appreciate any help to push this forward. 
Thanks so much,
Mike Matthews
Founder – Class 7 Consulting & Productions
[email protected]
