Somewhat tangentially related, hence my shameless plug: My startup (https://semantics3.com/ https://semantics3.com/) is building APIs for products data. Using

Somewhat tangentially related, hence my shameless plug: My startup (https://semantics3.com/ https://semantics3.com/) is building APIs for products data. Using our APIs, you can get access to rich metadata and pricing histories (including affiliate links) for over 10M e-commerce products. We have a pretty liberal free plan and you could potentially build interesting NFC apps with the data. Here is the invite link for signup: https://www.semantics3.com/signup?code=ramanujan https://www.semantics3.com/signup?code=ramanujan Drop me a note and I would be most glad to bump up your free quota.