Accomidating larger scale websites

We are developing a very large static question answer website called: Qeeebo. We are researching indexing services but most if not all of them just accomidate a small amount of pages at a time. Why is there no scalability or API for larger sites?

Loved what I saw with your tool initially, and of course your free AI visibility checker tool is a great addition for anyone to realize how important it is to be menioned and known in AI LLM models now.