MediaWiki:Apihelp-query+info-param-prop/en

Which additional properties to get:
 * protection:List the protection level of each page.
 * talkid:The page ID of the talk page for each non-talk page.
 * watched:List the watched status of each page.
 * watchers:The number of watchers, if allowed.
 * notificationtimestamp:The watchlist notification timestamp of each page.
 * subjectid:The page ID of the parent page for each talk page.
 * url:Gives a full URL, an edit URL, and the canonical URL for each page.
 * readable:Whether the user can read this page.
 * preload:Gives the text returned by EditFormPreloadText.
 * displaytitle:Gives the way the page title is actually displayed.