Enable Downloads in the WP REST API

 /**

 * Adds additional arguments into the post type registration for downloads.

 *

 * @param array $download_args The existing array of arguments.

 *

 * @return array

 */

function eddwp_add_rest_for_dls( $download_args ) {

	$download_args['show_in_rest'] = true;

	$download_args['rest_base'] = 'downloads';

	return $download_args;

}

add_filter( 'edd_download_post_type_args', 'eddwp_add_rest_for_dls', 10, 1 );