on the chatgpt side it it says that the POST isn’t active on the n8n side (which its), I have the correct URL implemented in both chatgpt and n8n, anyone have other ideas ?
What is the error message (if any)?
error POST
Did you use GPTs or just in normal prompt?
I only test the Custom GPTs that can use action to post data to my n8n.
can’t you use get? not tested with post, and if u do need post how are you calling the endpoint? You mentioned chatgpt? Could u explain more plz
I also tried to create a GPTs, (custom gpts)
I create an action to connect GPTs with a webhook in N8N installed in hostinger but it say "not able to reach webhook)
If I try curl command it suxceed,
If I try to connect N8N on Cloud it suxceed.
hostinger not.
I have the exact same issue. I have a self-hosted n8n server with Hostinger and created multiple actions in a custom GPT that should kick-off a flow in n8n through a webhook. They always work when triggered through a curl command. They only work randomly when triggered through the GPT.
When using a VPN connection to mimic requests coming from various locations, I also have issue connecting to my n8n VPS. So, I am thinking there is something wrong with the DNS resolver. Anybody experience with this?
Hi. Newbie here spent my first 24 hrs wrestling this same issue 
in short: Currently, OpenAI’s Custom GPTs do not support making outbound HTTP requests to external URLs (like your webhook) due to security and privacy policies.
This is a known limitation of OpenAI’s hosted Custom GPTs as of now. So even if your webhook and schema are correct, the Custom GPT can’t send data to your external webhook URL because the platform blocks those calls.
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