IOS Safari, maintains the Bookmarks, Reading List archives and other sync informationn in a sqlite DB. If you can able to get that Bookmarks.db file, you can explore the data which it uses.
select * from bookmarks where hidden_ancestor_count=0
select * from bookmarks where hidden_ancestor_count=1
select title,url,external_uuid from bookmarks where hidden_ancestor_count=1
Currently there is no way for third party applications to access the reading list. I created a simple app which reads the BooksmarksDB of Safari and pushes the Hyperlinks to my server. Here the sample application