Where ShelfHawk fits best, and what it does on Amazon
An earlier version of this post was titled 'Why we built Shelfhawk for Amazon FBA first'. That is not where the product is strongest today, so we rewrote it rather than leave a claim on the site that the product doesn't back up.
Where ShelfHawk fits best
ShelfHawk is built for small independent sellers who compete on price: handmade, vintage, resale and small-brand shops. The best fit today is eBay, checked through eBay's official API, and Shopify stores, including brand sites that run on Shopify, with full price and stock tracking — and, if you sell on Shopify yourself, one-click price changes on your own store.
What ShelfHawk does on Amazon
Amazon support is deliberately narrow. Paste an Amazon product page URL and ShelfHawk reads the listing's price and whether it is in stock, on the same schedule as everything else: once a day on Watch, twice a day on Watch + Suggest and Command. Changes land in your alerts and your daily briefing, next to your eBay and Shopify rivals.
What it does not do on Amazon: no Buy Box data, no sales rank, no reviews, and the Chrome extension does not work on Amazon pages. ShelfHawk cannot change prices on an Amazon listing either. Repricing and auto-pilot work with Shopify stores only. Amazon capacity is also small for now.
Who that suits
If Amazon is your whole business and you live in the featured-offer race, a dedicated Amazon tool will serve you better, and our Keepa comparison says so plainly. If Amazon is one channel among several — you sell on eBay or your own Shopify store and a few lines on Amazon — ShelfHawk puts those Amazon rivals' prices and stock in the same daily briefing as the rest, so you are not running a separate tool for one marketplace.
Why we changed the story
The tone of the product is careful: it tells you what it could not see rather than guessing. The blog should match. If you want to see the whole picture, the Amazon sellers page lists the limits up front, and pricing shows what each plan includes.