XML-RPC is a feature of WordPress that enables remote access to WordPress sites. While it can be useful in some situations, it can also be a security risk.
To disable XML-RPC in WordPress, you can use a plugin like Disable XML-RPC or simply add the following code to your site’s functions.php
file:
add_filter('xmlrpc_enabled', '__return_false');
Keep in mind that this may break some functionality on your site, so be sure to test thoroughly after making this change.