How to rewrite the request url of the api using resource type in the publisher ?

Hello everyone,

I have an api using Sling Resource Type that return the response in XML format.
I can call the API with the author IP and return the response in XML format:
For example url :
- {{ author IP }}/content/projectName/en/pageName/optionalSubPageName.selector.xml?param=abc

It returned the response in XML format
==> CORRECT as expected.

However, when I call the api with the PUBLISH IP OR PUBLISH DOMAIN such as:
- {{ publish IP }}/content/projectName/en/pageName/optionalSubPageName.selector.xml?param=abc
- {{ publish domain }}/pageName/optionalSubPageName.selector.xml?param=abc

It will automatically direct to the PAGE at the path "pageName" or "optionalSubPageName" instead of the response XML format.

Note: the {{ publish IP }} will automatically rewritten to {{ publish domain }} when it was called.

==> NOT CORRECT as expected.

My expectation: I can call the api and return the response in XML format with the request url as:
- {{ publish domain }}/pageName/optionalSubPageName.selector.xml?param=abc

Do you have any suggestion or is there any solution for this one ?
I don't have much experience with this situation.

P/s: the project is running by AEM CLOUD Service and on Adobe server. So it seems I cannot visit /system/console page.

Thank you in advance.