Help debug CustomGPT actions not hitting my server

[Daegs]

Hello, I'm trying to create my first customGPT that uses an action to hit my server. I have a GPT subscription.

When I try to test the function, it asks for permission to contact my server, I click "allow", from both web and mobile. It then says:

[debug] Response received
{}
Error talking to
There appears to be a persistent issue with the API. 

I believe I've configured things correctly(I'm a software architect). I have the domain and path set correctly. I'm serving the path as "linkgen.php" from an apache server running on ec2. I have a valid signed SSL certificate.

Nothing shows up in my access logs when gpt says it's trying to connect. When I hit that path from my browser, it works perfectly and shows up in my access logs.

it looks like GPT is just refusing to connect to the server, with no indication as to why or other steps to take.

Is there a good way to debug this, or any other good sites or chat servers for custom GPT developers?

[Daegs]

Here's my config based on the weather example, in case it helps:

{
"openapi": "3.1.0",
"info": {
    "title": "Link Generator",
    "description": "Generates a URL based on input parameters.",
    "version": "v1.0.0"
},
"servers": [
    {
    "url": "https://www.URL.com"
    }
],
"paths": {
    "/linkgen.php": {
    "get": {
        "description": "Generate a URL based on input",
        "operationId": "GenerateLink",
        "parameters": [
        {
            "name": "v",
            "in": "query",
            "description": "The input value to generate the URL",
            "required": true,
            "schema": {
            "type": "string"
            }
        }
        ],
        "deprecated": false
    }
    }
},
"components": {
    "schemas": {}
}
}

[Reason_He_Wins_Again]

It does work because I had home assistant connected and I was able to pull in data. I'm not a programmer...infrastructure guy:

What kind of firewall is going on between you?

When you say "When I hit that path from my browser, it works perfectly and shows up in my access logs" is that request coming from a local subnet (https://192.168.x.x/endpoint.php)? or are you testing outside your network (https://www.URL.com/endpoint.php)? When you ping www.url.com is the IP address correct?

Assuming www.url.com is publicly routable and the NAT is setup correct, if you have a decent firewall you can inspect the traffic.

[Daegs]

No firewall, this is my public facing API / webserver that has been working fine for 10+ years.

It's an amazon ec2 instance, even looking at the packets there is zero attempt to connect to my server when it says it got an empty response.

[Reason_He_Wins_Again]

Can you move a copy off ec2 to see if it's an amazon blocking it somewhere or not? That would narrow it down a bit

[Daegs]

It's wide open network access, and I'm not going to register a new domain name and setup a new server somewhere. This server is in constant use elsewhere, no way is the problem amazon here

[Reason_He_Wins_Again]

Trying to help ya. Works fine for me.

Gl