With Lasso, you don't need API keys to work with Amazon. All you have to do is enter any Amazon product URL into Lasso and it'll automatically grab the title, image, and URL with your primary tracking ID.
In fact, all you need to enter in the Lasso Amazon Settings is your Primary Tracking ID for this to work.
It's our goal at Lasso to remove headaches like this, we'd rather you put your time towards creating something awesome.
Note: Adding your Amazon API keys will speed up the processing time for your Amazon data. However, it's entirely optional, and Lasso will still pull Amazon data for you if you leave the 'Amazon Product API' section blank. The choice is totally yours!