Recently the Designer has gotten two new great SEO-features in Page Settings.
One is to disable Template pages from publishing.
The second is to disable static pages from being added to the sitemap.

Listing pages in Webflow API will always shows all pages, even with this settings disabled. It would be ideal to either query without these pages or if the response contained information about this. This is to filter out pages in the API response that should not be published / visible.