Amazon Seller Intelligence – BSR Watchlist, Buy Box & Price Monitor

Daily Amazon product monitoring at $0.004 per ASIN. No subscription.

Monitor your entire Amazon ASIN watchlist daily. Know instantly when your Buy Box changes, when a competitor drops their price, or when your BSR tanks overnight — without paying $99–$279/month for Helium 10 or Jungle Scout.

What it tracks per ASIN

• Best Sellers Rank (current + change since last run)
• Buy Box owner (flags when it changes hands)
• Price (current + % change since last run)
• Review count and velocity (new reviews since last run)
• Stock status
• Competing seller count

Who it's for

• FBA sellers monitoring their own catalogue
• Retail arbitrage operators watching competitor prices
• Amazon agencies running daily reporting for clients
• Tools builders adding Amazon intelligence to their product

Pricing

Event	Price
Run started	$0.05
ASIN checked	$0.004
Buy Box change detected	+$0.002
ASIN failed	$0.001

100 ASINs daily = $0.45/day = ~$13.50/month Helium 10 Starter: $99/month

Input

Field	Default	Description
asins	required	Array of ASINs to monitor (max 500)
marketplace	amazon.co.uk	Which Amazon marketplace
trackBsrHistory	true	Store snapshots to track changes over time
alertOnBuyBoxChange	true	Flag Buy Box ownership changes
alertOnPriceDropPercent	10	Flag drops over this % (0 = disabled)
includeOfferCount	true	Include competing seller count
includeReviewVelocity	true	Track new reviews since last run

Output fields

• asin, marketplace, productTitle, productUrl, imageUrl
• currentPrice, currency, previousPrice, priceChange, priceChangePercent, priceFlagged
• buyBoxWinner, buyBoxWinnerPrevious, buyBoxChanged, isBuyBoxAmazon, offerCount
• bsr, bsrCategory, bsrPrevious, bsrChange, bsrChangePercent
• reviewCount, reviewRating, reviewCountPrevious, reviewVelocity
• inStock, stockStatus, checkedAt, lastRunAt, status

Setup note

No API keys required. Provide your ASIN list and marketplace.

Known limitation, confirmed live: Amazon's bot detection currently blocks every request on this account, even with Crawlee's fingerprint generation and Apify's automatic/default proxy selection enabled — the page loads but returns no real product data (not a CAPTCHA page either; none of the real selectors this actor looks for are present, indicating a different, undetected block variant). This actor was rebuilt to surface that honestly (status: "failed", errorMessage naming the real page title returned) rather than silently outputting an all-null "success" row, which is what the earlier version of this actor did. If Amazon access matters for your use case, it likely needs a stronger/paid residential proxy allocation than what this account currently has available — the older advice to "use Apify Residential Proxies for best results" was not itself tested against this specific block; treat it as unverified until confirmed.

n8n integration

Schedule this actor daily → filter buyBoxChanged: true or priceFlagged: true → send Slack or email alert.