Unable to show posts but no error

First of all Thank you for this wonderful plugin

I have installed this on my wordpress site.

I tried below two queries both does not result in output but I do not get any error as well. Status 200 OK.

I am using google chrome postman plugin to test the Json output, apart from activating plugin is there anything I need to do?
http://cookingshooking.in/wp-json/posts
http://cookingshooking.in/wp-json/posts/2381

https://wordpress.org/plugins/json-rest-api/