Getting News articles using REST API

Hello, We have a site for newsroom, where we are displaying all news articles. I need to create a rest API to read this information and display it on our REACT based app. I am unable to get hold of a URL that would provider me with this Information. 
I have tried following URLS but I am not getting the desired results

• https://<tenant>.sharepoint.com/sites/iNewsroom/_api/Web/Lists/getByTitle('Site%20Pages')/items?$select=*
• https://<tenant>.sharepoint.com/_api/search/query?querytext=%27IsDocument:True%20AND%20FileExtension:aspx%20AND%20PromotedState:2%27
• https://<tenant>.sharepoint.com/search/_api/search/query?querytext=%27IsDocument:True%20AND%20FileExtension:aspx%20AND%20PromotedState:2%27\

Is there any other URL I can try to get the information? The newsroom site has a few sitep