WP REST API Set Permission for Existing Endpoints - wordpress

Question

I have a custom post type, card, that I'm exposing through the WP REST API.
function register_card_post_type() {
$labels = array(
"name" => __( 'Cards', '' ),
"singular_name" => __( 'Card', '' ),
);
$args = array(
"label" => __( 'Cards', '' ),
"labels" => $labels,
"description" => "",
"public" => true,
"publicly_queryable" => true,
"show_ui" => true,
"show_in_rest" => true, // ADD TO REST API
"rest_base" => "cards", // ADD TO REST API
"has_archive" => false,
"show_in_menu" => true,
"exclude_from_search" => false,
"capability_type" => "post",
"map_meta_cap" => true,
"hierarchical" => false,
"rewrite" => array( "slug" => "card", "with_front" => true ),
"query_var" => true,
"menu_position" => 5,
"supports" => array( "title" ),
);
register_post_type( "card", $args );
}
add_action( 'init', 'register_card_post_type' );
It seems like by default, the endpoints are public. How do I set the authentication requirements for the endpoint, so that GET /cards/ requires either an auth cookie or header?
In the API handbook is shows how to write a custom endpoint, but ideally is there a filter or hook I can use to extend the autogenerated endpoints?
add_action( 'rest_api_init', function () {
register_rest_route( 'myplugin/v1', '/author/(?P<id>\d+)', array(
'methods' => 'GET',
'callback' => 'my_awesome_func',
'args' => array(
'id' => array(
'validate_callback' => 'is_numeric'
),
),
'permission_callback' => function () {
return current_user_can( 'edit_others_posts' );
}
) );
} );

Answer 1

You can use the rest_pre_dispatchfilter to check the URL and revoke access to that endpoint for not logged in users:
add_filter( 'rest_pre_dispatch', function() {
$url = strtok($_SERVER["REQUEST_URI"],'?');
if ( !is_user_logged_in() &&
!in_array($url, array ( //using "in_array" because you can add mmultiple endpoints here
"/wp-json/cards",
))){
return new WP_Error( 'not-logged-in', 'API Requests to '.$url.' are only supported for authenticated requests', array( 'status' => 401 ) );
}
} );
This is not the best solution because it will run the query and will filter the result, but I'm using this until discover a way to block the API access before the query is executed.