Can i create unify API for different platforms?

Hi all!

I want to create a service which will provide unified API for different platforms and I have some questions:
• Can I create my own URL for API calls? For example, I want use https://mysite-name.com/api:fjF6GKKx/methon, not https://xrrck-inu6-aersl.f2.xano.io
• What should I pay attention to when creating such a service? Are there any best practices for combining different APIs into one? Should it be a single call that, using conditions, calls the functions of the desired platform, or is it something else?

Thanks!