Based on our record, Rainforest API seems to be more popular. It has been mentiond 1 time since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
You idea is known as a product comparison engine. When you sign up for an Amazon referral account it's one of the options. It's also similar to the CamelCamelCamel website. You might want to start with https://rainforestapi.com/ they have a hobbyist price tier. Getting access to all the data will be a big challenge, look at the stores and see if they have a product API. Source: over 1 year ago
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