You can block the API.
add_action('themes_api', 'se_block_api');
add_action('plugins_api', 'se_block_api');
function se_block_api(){
exit;
}
You can block the API.
add_action('themes_api', 'se_block_api');
add_action('plugins_api', 'se_block_api');
function se_block_api(){
exit;
}