How to add product to cart in Woocommerce via REST?

Question

RESTful API

function wts_add_to_cart()
    {
        $product_id = $_GET['product_id'];
        WC()->cart->add_to_cart( $product_id );
        $data = [ 'name' => 'Product 1', 'product_id' => (int) $product_id ];//для теста
        return $data;
    }

register_rest_route('wts/v1', 'cart/add', [
        'methods' => 'POST',
        'callback' => 'wts_add_to_cart',
    ]);

site.com/wp-json/wts/v1/cart/add?product_id=1762 gives 500 error