Case study: Keepa API powered price-drop emails, +18% revenue per send

Case study: Keepa API powered price-drop emails, +18% revenue per send

A price-comparison site wired the Keepa price-tracking API into their email list — tracking 6,000 ASINs, firing an alert email when any tracked product hit a 90-day low.

Setup: Keepa Data tokens (~€49/mo for their volume), a cron pulling drops nightly, segmenting subscribers by category interest.

What happened:
— Price-drop emails hit 38% open rate vs 19% on their normal newsletter
— Revenue per send rose 18% because urgency + real low price beat curated picks
— Token budget ran dry twice mid-month from over-polling

Gotcha nobody mentions: Keepa's "90-day low" includes third-party and used offers by default. Two early sends pointed buyers at a used-condition low — refunds and one angry reply. Filter to new-condition Buy Box before you trust the number.

My pick: Keepa over CamelCamelCamel's feeds if you want programmatic access and historical depth; the API tokens are the only real cost.

Bottom line: price-drop urgency is the highest-converting email a deals site can send — just lock the offer condition filter first.