Change the Maximum per_page value in the Query

functions.php

<?php

function change_end_points_default_values($endpoints){
	/**
	 * Posts EndPoint
	 * print_r($endpoints['/wp/v2/posts']);
	 *
	 * Argumentos Originales
	 *
	 * Array
	 *	(
	 *	    [description] => Maximum number of items to be returned in result set.
	 *	    [type] => integer
	 *	    [default] => 10
	 *	    [minimum] => 1
	 *	    [maximum] => 100
	 *	    [sanitize_callback] => absint
	 *	    [validate_callback] => rest_validate_request_arg
	 *	)
	 */
	$endpoints['/wp/v2/posts'][0]['args']['per_page']['maximum'] = 1000;
	return $endpoints;
}

add_filter('rest_endpoints', 'change_end_points_default_values');