GPT can't use API with actions

[djsapsan]

I’m trying to build my GPT and use my API hosted on a different server. API returns only text and it works everywhere. But GPT still can’t see it:

In my browser:

On the server:

My schema is the following:

openapi: 3.0.0
info:
  title: Screenshot API
  description: API to interact with a server that provides a static image and allows taking screenshots.
  version: 1.0.0
servers:
  - url: https://server
    description: Main server hosting the pictures and chat functionality.
paths:
  /chat:
    get:
      operationId: getChat
      summary: Retrieves the latest chat messages.
      description: Returns the latest chat messages at the specified URL.
      responses:
        "200":
          description: Latest chat messages.
          content:
            text:
              schema:
                type: string

[Appertivo]

Did you update the server url in the schema with your url.com/chat?

This is a handy sidekik:

ChatGPT - OpenAPI Schema

[djsapsan]

Of course, but I’m not revealing it publicly.
So, should I buy a domain? Because I’m using a self-signed cert on my server.

[Appertivo]

You can also ask your gpt what the error was. That has worked for me.

[djsapsan]

So GPT could not help.
I resolved it by getting a trusted HTTPS.