Office 356 REST API for search

Office 365 REST API for search return only 500 rows by setting parameter rowimit=500. This is the query i am trying..

https://server_address/_api/search/query?querytext='test'&rowlimit=500

but when i try to extend the limit to more than 500, I was getting following error

Is there any way to extend the limit to more than 500 rows?

Where can we find the documentation for REST API for SharePoint search?