Tutorials, industry analysis, and best practices for ecommerce data extraction, API integration, and competitive intelligence.
How the SellerMagnet API's deliveryDate field works on /amazon-product-offers: one normalized YYYY-MM-DD date per offer (or N/A), how a range or a relative term like "tomorrow" gets resolved to that one date, why the address behind it depends on geo_location, and why two offers from the same seller with different delivery dates are not duplicates. A tested Python script that finds the fastest real offer.
What the Amazon Product API's bulletPoints field actually returns: feature-bullets text, how a product-facts page (books, groceries) replaces it entirely instead of adding to it, when the list comes back empty, and how it differs from additionalDetails. A tested Python export script and the field reference.
Get Amazon India product data with an API: marketplace ID A21TJRUUN4KGV queries amazon.in and returns INR prices, with full price history support. Why amazonPrice and shareBuyBox behave differently on amazon.in than on any other marketplace, which endpoints answer, and a tested Python script that compares the same ASINs on amazon.in and amazon.de.
Rotate a SellerMagnet API key with zero downtime: generate a second key, confirm it is live with a free check, run both side by side, then delete the old one. Why Reset is not the same as a rotation, why a toggled-off key still counts toward the 3-key limit, and a tested Python script that checks a new key for free and falls back to the old one.
Get Amazon Ireland product data with an API: marketplace ID A28R8C7NBKEWEA queries amazon.ie and returns EUR prices. Which endpoints answer on amazon.ie, why price history and sales estimates do not, why UK category IDs work for best sellers, and a tested Python script that compares the same ASINs on amazon.ie and amazon.co.uk.
Why does the Amazon Best Sellers API return only 30 products, and how do you page through the rest? count and offset select a window of one 50-product page: count=50 gets the whole list for 1 credit, offset + count can never pass 50, and past rank 50 only subcategories add products. Tested Python with a credit cap and deduplication included.
API key in the header or in the query string? Both work on the SellerMagnet Amazon data API, but a key in the URL is copied into requests' error texts, urllib3's retry messages and every access log that records URLs. A tested Python check shows where it leaks, plus a logging filter and a log scanner that keep the key out of your logs.
productInfo.hasAPlusContent from /amazon-product-lookup is true whenever a listing has a brand story OR product documents - one flag covering two different things, with no way to tell them apart. Screen a whole catalogue for missing A+ content with one lookup per ASIN, and keep failed lookups separate from a genuine false so the count stays honest.
Get an Amazon product's video URLs from one API call and read them correctly: productInfo.videos returns up to two HLS playlists (.m3u8), not MP4 links, so a plain download saves a text manifest instead of a video. Covers detecting how many videos a listing has and turning the playlist into an MP4 with ffmpeg.
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