Commerce data guides

How Amazon pricing data works in 2026: PA-API's deprecation, what replaced it, why scraping fails at scale, and how to get price history through an API.

How to get Walmart pricing data: the affiliate API route, why prices are stripped from the page payload, and how marketplace sellers change the picture.

Best Buy runs the only genuinely open product API among major US retailers — free, keyed, with prices and GTINs. What it returns, and where the limits are.

How to get Costco pricing data: which access routes exist, what each returns, identifier coverage, and the traps that make naive comparison wrong.

How to get Target pricing data: which access routes exist, what each returns, identifier coverage, and the traps that make naive comparison wrong.

How to get Home Depot pricing data: which access routes exist, what each returns, identifier coverage, and the traps that make naive comparison wrong.

How to get eBay pricing data: which access routes exist, what each returns, identifier coverage, and the traps that make naive comparison wrong.

How to get Shopify storefronts pricing data: which access routes exist, what each returns, identifier coverage, and the traps that make naive comparison wrong.

How to get Lowe's pricing data: which access routes exist, what each returns, identifier coverage, and the traps that make naive comparison wrong.

How to get Newegg pricing data: which access routes exist, what each returns, identifier coverage, and the traps that make naive comparison wrong.

How to get Wayfair pricing data: which access routes exist, what each returns, identifier coverage, and the traps that make naive comparison wrong.

How to get AliExpress pricing data: which access routes exist, what each returns, identifier coverage, and the traps that make naive comparison wrong.

How to get Etsy pricing data: which access routes exist, what each returns, identifier coverage, and the traps that make naive comparison wrong.

How to get Chewy pricing data: which access routes exist, what each returns, identifier coverage, and the traps that make naive comparison wrong.

How MAP monitoring works: detecting violations across marketplaces, identifying unauthorised sellers, and building evidence that survives a lawyer reading it.

A technical guide to competitor price monitoring: how matching fails silently, why cadence should be earned, and how to evaluate vendors on what they can prove.

What agentic commerce is, which protocols matter, and why an AI shopping agent cannot answer whether a price is good without a history it has no way to build.

Measured field coverage across 1,993 products and 11,265 variants in nine industries: where GTINs exist, and which fields you cannot rely on.

How price history should be stored and read: append-only observations, time-weighted percentiles, why ties need midrank, and why history cannot be backfilled.

What price tracking really requires: where the data comes from, what each route costs, and why identity is harder than collection. A practical 2026 guide.

Getting product and price data at scale, measured: which sources are free, what a single request returns per source, and where the real constraints bind.

Repricing engines are only as good as the observations underneath. What a pricing system needs from its data layer, and the checks that stop bad prices.

Buy-side price intelligence: verifying quoted prices against the observable market, detecting supplier price drift, and why procurement matching is harder.

What separates a working price comparison engine from a list of prices: identity, landed cost, freshness and the honest answer when no equivalent exists.

What general-purpose extraction tools return, what a structured commerce index returns, and why the difference is identity and history, not fetch rate.

Dynamic pricing explained: what actually drives a price change, how it differs from personalised and surge pricing, where it fails, and what data it depends on.

How barcode lookup works, how GTIN-12, GTIN-13 and GTIN-14 relate, why check digits matter, and measured coverage of where barcodes actually exist.

What to check when replacing a price monitoring vendor: match quality on your own SKUs, freshness per retailer, provenance, history depth and export.

Evaluating alternatives to Prisync: what it is genuinely good at, where a different tool fits better, and the checks that separate vendors here.

Evaluating alternatives to Price2Spy: what it is genuinely good at, where a different tool fits better, and the checks that separate vendors here.

Evaluating alternatives to Keepa: what it is genuinely good at, where a different tool fits better, and the checks that separate vendors here.

Evaluating alternatives to CamelCamelCamel: what it is genuinely good at, where a different tool fits better, and the checks that separate vendors here.

Evaluating alternatives to Intelligence Node: what it is genuinely good at, where a different tool fits better, and the checks that separate vendors here.

Evaluating alternatives to DataWeave: what it is genuinely good at, where a different tool fits better, and the checks that separate vendors here.

Evaluating alternatives to Competera: what it is genuinely good at, where a different tool fits better, and the checks that separate vendors here.

Evaluating alternatives to Profitero: what it is genuinely good at, where a different tool fits better, and the checks that separate vendors here.

Evaluating alternatives to PriceSpider: what it is genuinely good at, where a different tool fits better, and the checks that separate vendors here.

Evaluating alternatives to Bright Data: what it is genuinely good at, where a different tool fits better, and the checks that separate vendors here.

Evaluating alternatives to Oxylabs: what it is genuinely good at, where a different tool fits better, and the checks that separate vendors here.

Evaluating alternatives to Zyte: what it is genuinely good at, where a different tool fits better, and the checks that separate vendors here.

Evaluating alternatives to ScraperAPI: what it is genuinely good at, where a different tool fits better, and the checks that separate vendors here.

Evaluating alternatives to Rainforest API: what it is genuinely good at, where a different tool fits better, and the checks that separate vendors here.

Evaluating alternatives to Pricefx: what it is genuinely good at, where a different tool fits better, and the checks that separate vendors here.

Evaluating alternatives to Vendavo: what it is genuinely good at, where a different tool fits better, and the checks that separate vendors here.

Evaluating alternatives to Zilliant: what it is genuinely good at, where a different tool fits better, and the checks that separate vendors here.

Evaluating alternatives to Revionics: what it is genuinely good at, where a different tool fits better, and the checks that separate vendors here.

Evaluating alternatives to PROS: what it is genuinely good at, where a different tool fits better, and the checks that separate vendors here.

Evaluating alternatives to Minderest: what it is genuinely good at, where a different tool fits better, and the checks that separate vendors here.

Evaluating alternatives to TrackStreet: what it is genuinely good at, where a different tool fits better, and the checks that separate vendors here.