Once the plugin is installed and activated you can check for the API by loading `yoursite.com/wp-json` in your browser. You should see a block of JSON text.
It may be fun at this point to check on some other routes such as
wp-json/posts. And if you visit
wp-json/users you’ll get an authorization error because the API handles authentication via the same cookie that the WordPress admin uses.
Note: This lesson assumes you are using pretty permalinks on your site. Without pretty permalinks, an API route would look like for example `yoursite.com/?json_route=/posts`
The full set of routes and endpoints are listed for your benefit on wp-api.org
If you want to test out the routes and view well formatted JSON responses, try the Postman Extension for Chrome. Or, for example, use a command line helper to get pretty JSON
curl http://yoursite.com/wp-json/posts | python -m json.tool