Getting the Nabu Casa remote URL programmatically via addon?

I am contributing to an addon called hass-n8n for hosting N8N on-prem on the Home Assistant as an addon.

This addon needs access to the remote URL. However, this is only possible to fetch if the external URL has been manually specified. Not if it has been specified via Nabu Casa remote UI.

Can this be resolved, so addon authors can fetch this URL?

The reason I need it is that N8N expects an external URL to be specified, since it requires HTTPS for things like Google Calendar OAuth API integrations, where the callback URL is required to be HTTPS. And so, localhost will not work.

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currently wondering this too, as I would love to run n8n with HAOS without using Dockers for AI agents.