Amazon services usage

I've been developing the Saas solution based on Amazon services usage. So I want to change my platform's subscription fee and internal prices depending on the Amazon price changes. I ultimately want to do it automatically, but for now I just want to get notified about changes of prices.
I suppose that parsing of Amazon's pricing pages is really bad idea. But what can I do for now?

There is AWS Price List API so you can access prices for AWS services. And I can recommend you guys from a software development company, they have great experience in working with Amazon. I used their help several times.