How to create new product, menu on Waiter using API ?

カテゴリ: Waiter

I am developing a food ordering webapp. I want to sync food information and prices to Smaregi Waiter.

However the Waiter does not provide the necessary APIs to create/update product information, menu information, etc.

So which API do I need to use to do that? If there is a project sample, I would thank you very much.