Changes the standard capabilities to access SNIPs REST API to a different value.

snip-rest-capabilities.php

<?php
/*
Plugin Name: snip - REST API Capability Changer
Plugin URI: https://rich-snippets.io/global-snippets-capabilities/
Description: Changes the standard capabilities to access SNIPs REST API to a different value.
Version: 0.1.0
Author: floriansimeth
Author URI: https://florian-simeth.de
License: License: GPLv2 or later

Copyright (c) 2018 Florian Simeth

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/

if ( ! defined( 'ABSPATH' ) ) {
	exit;
} // Exit if accessed directly

add_filter( 'wpbuddy/rich_snippets/rest/permission', function () {
	return current_user_can( 'manage_options' );
} );

Change line number 32 so that it fits your needs.

Please follow the instructions found here on how to control access to SNIPs REST API.