Tutorials, industry analysis, and best practices for ecommerce data extraction, API integration, and competitive intelligence.
Calculate the Amazon referral fee on a live Buy Box price - percentage of the total price or a stated minimum, whichever is greater - then subtract it and your fulfilment fee from the current price to see the margin over your landed cost per ASIN, in Python.
Amazon API marketplace coverage depends on the endpoint: lookup, offers, search, bestsellers, deals and seller reviews accept all 23 Amazon marketplaces, while statistics, sales estimates and the ASIN converter cover 11 and answer the other 12 with a free 400. Here is the full table, what each refusal costs and a Python script that skips what a marketplace cannot answer.
The Amazon search API geo_location parameter sets the delivery postcode for one search, but only as far as Amazon accepts it: a refused or lost postcode still returns a billed 200 from another location, and the response never says which. What the parameter does, when it is ignored, every default postcode, and a Python script that measures whether a postcode changes page one.
Give an OpenAI model a tool that looks up real Amazon prices, ranks and titles: the Chat Completions tools/tool_calls contract, a manual tool-calling loop with a hard credit budget, and the same guardrails as the Claude tool-calling guide, adapted to OpenAI's API shape.
Look up hundreds of ASINs concurrently with httpx.AsyncClient and a Semaphore sized to the API's per-key concurrency limit, with the free 429 handled as a wait, not a failure. An async sibling of the thread-based Python quickstart and the bulk ASIN lookup guide.
Use the Amazon Japan product API for amazon.co.jp: marketplace ID A1VC38T7YXB528, prices in yen (never divided by 100), the Date First Available day/month swap, Amazon's own seller ID on Japan and Japanese titles. Tested Python that handles all of it at 2 credits per ASIN.
Build an Amazon price tracker with GitHub Actions: a scheduled workflow runs a Python script that reads the Buy Box price for each ASIN, commits the history to prices.csv and opens an issue when a price drops by 5 % or more. No server and no database; tested code, the workflow file and the credit math included.
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 live check only shows a competitor's offer as in stock or out right now. The per-seller stockHistory inside /amazon-product-statistics shows every recorded gap, so you can measure how long an outage actually lasted instead of guessing from one snapshot.
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