Is hosting the ai-plugin.json manifest file at my domain required for actions (vs. plugins)?

I’m developing a GPT to communicate with my API. I’m receiving ‘connection errors’ with my action definition. I’m fairly certain the OpenAPI spec is correct and our API is up and public (I can curl).

Do I need to place the plugin json at our domain to support Action calls from a GPT?

I have not seen in my logs a request for ai-plugin.json since moving to Actions. My educated guess is that its not required since we are now technically uploading the OpenAPI spec to OpenAI for hosting.

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