How do we correctly connect Stackby to n8n? None of the API endpoints in the docs seem to work, and support has not replied to 3 emails in 9 days.

Additional details:
Trying to connect Stackby to n8n using either the Stackby node or a custom HTTP Request node. Every attempt fails. Errors include:
ENOTFOUND api.stackby.com
501 Something went wrong
Header name must be a valid HTTP token
Unable to find the requested resource
Tried all documented methods:
https://api.stackby.com/api/betav1/row/list
Adding stackId + tableId as query params
Headers: X-Stackby-API-Key or api-key
The native n8n Stackby node with correct Stack ID + Table ID
Nothing returns valid data.
Can someone from Stackby confirm the current working API base URL and correct header format for external tools like n8n? Or provide a working example?