Md. Rakib Ullah

RestArmor Security is a “Plug & Play” security suite that hardens your WordPress site instantly upon activation. No complex setup required.
Features: 
* Disable XML-RPC: Blocks XML-RPC attacks and Pingbacks. 
* Block REST API: Restricts API access to logged-in users only. 
* Stop User Enumeration: Blocks bot scans for /?author=1. 
* Hide WP Version: Removes version number from source code. 
* Admin Indicator: Shows security status in the admin bar.

RestArmor Security

Advanced security suite. Blocks REST API, disables XML-RPC, prevents user enumeration, and secures endpoints.

ksym04

Turn off JSON REST API on your website to anonymous users and prevent unauthorized requests from using the REST API to get information from your website.
Since the release of WordPress 4.0 came out, there have been a lot of hackers exploiting the vulnerabilities of the REST API. By installing this plugin, you will effectively prevent and disable the use of REST API from unauthorized users and protect the information on your website from being accessible. If someone tries to access the REST API on your site, the plugin will return an authentication error on the API endpoints, for any unauthorized users trying to access it.
While WordPress REST API vulnerability exploits continue this plugin effectively prevent and disable the used of REST API from accessing information from your website, this plugin return authentication error and disable all endpoints for any user not logged in on your website.
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Turn Off REST API

Prevents unauthorized requests from using the WP REST API.

RestArmor Security vs Turn Off REST API