Tutorials, industry analysis, and best practices for ecommerce data extraction, API integration, and competitive intelligence.
Convert a book's ISBN-10 or ISBN-13 into its Amazon ASIN with the same converter endpoint used for UPC and EAN barcodes - normalise the ISBN locally, check its digit for free, then spend one credit on the call. Covers the 11 supported marketplaces and the billed-versus-free error split.
A scraper API hands you a proxy network and still leaves parsing to you; a managed product data API hands you typed fields. Both read the same public Amazon pages. Which is worth building depends mostly on volume and how much you want Amazon's layout changes to be your problem.
Pull title, Best Sellers Rank and price for a list of ASINs from the SellerMagnet API and upsert one row per ASIN into an Airtable base - batched up to 10 records per call, throttled to stay under Airtable's 5-requests-per-second-per-base limit, and keyed on the ASIN so re-running the sync updates existing rows instead of duplicating them.
Every SellerMagnet request costs one credit, charged the moment it's processed - a 404 is billed, a 500 is refunded, a 502/503 is billed on every retried attempt. This calculator turns an Amazon data use case (a price tracker, a catalog sync, a one-off research sweep) into a monthly request count, then compares the cheapest subscription plan against pay-as-you-go using the live plan table from sellermagnet-api.com/pricing.
Amazon's Selling Partner API needs a registered seller or vendor account and an approved use case before it returns a single product. A managed product data API skips that gate: one API key, a GET request per ASIN, and a JSON response with price, rank, offers and history, no Amazon account required at all.
A browser extension or front-end can't hold a SellerMagnet API key: its JavaScript, manifest and storage all ship to the user's machine and unpack from a plain zip. The fix is a small server-side proxy that holds the key, allow-lists endpoints and rate-limits by caller - the extension only ever talks to your own origin.
A real Postman Collection v2.1 for all 10 SellerMagnet Amazon API endpoints: a companion environment with a secret api_key variable, pm.test() scripts that check the status code, the success flag and one shape specific assertion per endpoint, and newman instructions for CI.
Call an Amazon product API from Node with nothing but the built in fetch: JSDoc type declarations for product lookup, offers and search, a price type that survives "N/A", retries that never pay twice for the same miss, and a small Promise based worker pool, since there is no batch endpoint.
Call an Amazon product API in Java with nothing but the standard library: java.net.http.HttpClient with a 120-second timeout, a small hand-rolled JSON reader, records for product lookup and statistics that keep the two different price formats apart, retries that respect billing, and a fixed thread pool for bulk lookups.
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