functions.php

//removes extra keys from the wc orders rest api

function change_shop_order_response( $response, $object, $request ) {
	$response_data = $response->data;
	$remove_keys = array('version','currency','customer_ip_address','customer_user_agent','');
	$filtered_res = array_diff_key( $response_data, array_flip( $remove_keys ) );
	$response->data = $filtered_res;

	return $response;
}

add_filter( 'woocommerce_rest_prepare_shop_order_object', 'change_shop_order_response', 10, 3 );

// change products response in wc product api

function change_product_response( $response, $object, $request ) {

	$response_data = $response->data;
	$remove_keys = array('permalink', 'date_created', 'date_created_gmt', 'date_modified', 'date_modified_gmt', 'status', 'featured', 'catalog_visibility', 'sku', 'price', 'regular_price', 'sale_price', 'date_on_sale_from', 'date_on_sale_from_gmt', 'date_on_sale_to', 'date_on_sale_to_gmt', 'price_html', 'on_sale', 'purchasable', 'total_sales', 'virtual', 'downloadable', 'downloads', 'download_limit', 'download_expiry', 'external_url', 'button_text', 'tax_status', 'tax_class', 'manage_stock', 'stock_quantity', 'in_stock', 'backorders', 'backorders_allowed', 'backordered', 'sold_individually', 'weight', 'dimensions', 'shipping_required', 'shipping_taxable', 'shipping_class', 'shipping_class_id', 'reviews_allowed', 'average_rating', 'rating_count', 'upsell_ids', 'cross_sell_ids', 'parent_id', 'purchase_note', 'categories', 'tags', 'default_attributes', 'grouped_products', 'menu_order');
	$filtered_res = array_diff_key( $response_data, array_flip( $remove_keys ) );
	$response->data = $filtered_res;
	return $response;
}

add_filter( 'woocommerce_rest_prepare_product_object', 'change_product_response', 20, 3 );