MediaWiki:Apihelp-query+readinglistentries-extended-description/en

This module has two modes of operation. With the $1lists parameter, it returns the pages in the given list(s). With the $1changedsince parameter, it returns all list entries from any list of the current user which have been changed since the given date. (This is meant for device sync and, unlike the other modes, includes deleted entries, although not entries of deleted lists.)