Track WFS vs. seller-fulfilled competition, ratings, and offer counts to model competitive pressure per SKU, mirrors Amazon's FBA/3P distinction, but with a much larger practical impact given how heavily WFS listings are favored for the Featured Offer.
For Market Intelligence Teams
Competitor Price Monitoring
Submit your GTIN list, get back competitor prices, buy-box owners, promos and stock status across Amazon, Google Shopping, eBay and Walmart. Feed it into your own repricer, alerting or BI stack.
· Free tier available · Plans from €79/mo
12 Marketplaces · Live Competitor Pricing
What You Get
Every Marketplace. Every Signal. No Seller Account
Schema
Same schema across every source
Same field names, same types, whether you're calling Amazon, Google or Walmart. No per-source parsers, no adapter layer to maintain.
Depth
Beyond price
Buy-box owner, seller count, seller identity, promo flags, stock status and shipping, every signal your logic needs, not just the sticker price.
Integration
Plug into your stack
Feed a repricer, alert Slack or PagerDuty, or land it in BigQuery. Infrastructure, not a closed dashboard.
How It Works
One catalog. One normalized signal per SKU
kwery fetches the current listings from each marketplace, validates the fields, and returns a normalized payload, synchronously for single lookups with wait, or delivered to your callback URL for batches.
Submit your list
Post GTINs, ASINs or product URLs across Amazon, Google Shopping, eBay and Walmart. Matching is handled server-side.
We fetch and validate
kwery pulls the current listing from each marketplace and validates every field, price, seller, stock, promos, shipping.
Get the payload back
Single lookups can return synchronously to your app with wait; batches run as jobs and are delivered to your signed callback URL. Results are normalized, signed, and ready to feed your repricer or store in your warehouse.
POST · api.kwery.co/job
{
"job_id": "6aa7ab8a0e5b0b736acb0ec7",
"status": "finished",
"results": [
{
"query": {
"source": "idealo",
"country": "de",
"key": "gtin",
"value": "4006381333962",
"topic": "search",
"max_pages": 1,
"max_age": 1200
},
"content": {
"id": "811105",
"name": "STABILO point 88 ocker",
"url": "https://www.idealo.de/preisvergleich/OffersOfProduct/811105",
"categories": [
"Marker"
],
"category_ids": [
"25543"
],
"price_avg": 16.8,
"price_max": 169,
"price_min": 0.63,
"offers_count": 13,
"offers": [
{
"seller_name": "shop.wichmann.de",
"shop_url": "http://www.shop.wichmann.de",
"shop_type": "standalone-shop",
"marketplace_name": "N/A",
"shop_review_rating": 3.4,
"shop_review_count": 5,
"position": 1,
"condition": "new",
"currency": "EUR",
"price": 0.63,
"shipping": 13.92,
"total": 14.55,
"free_return": false,
"voucher": false,
"availability_code": "green",
"availability_text": "bis Mi. 16.09.2026",
"direct_sale": false
},
{
"seller_name": "buero-bedarf-thueringen.de",
"shop_url": "http://www.buero-bedarf-thueringen.de",
"shop_type": "standalone-shop",
"marketplace_name": "N/A",
"shop_review_rating": 4.31,
"shop_review_count": 356,
"position": 2,
"condition": "new",
"currency": "EUR",
"price": 0.73,
"shipping": 4.75,
"total": 5.48,
"free_return": false,
"voucher": false,
"availability_code": "green",
"availability_text": "sofort lieferbar",
"direct_sale": false
},
{
"seller_name": "mcbuero.de",
"shop_url": "http://www.mcbuero.de",
"shop_type": "standalone-shop",
"marketplace_name": "N/A",
"shop_review_rating": 1.6,
"shop_review_count": 15,
"position": 3,
"condition": "new",
"currency": "EUR",
"price": 0.74,
"shipping": 6.99,
"total": 7.73,
"free_return": false,
"voucher": false,
"availability_code": "green",
"availability_text": "bis Do. 17.09.2026",
"direct_sale": false
},
{
"seller_name": "Drachenstube - Ebersberg",
"shop_url": "http://www.richtiggutesspielzeug.de",
"shop_type": "marketplace-shop",
"marketplace_name": "richtiggutesspielzeug.de",
"seller_id": "lxVojBbDc3",
"shop_review_rating": 0,
"shop_review_count": 0,
"position": 4,
"condition": "new",
"currency": "EUR",
"price": 0.89,
"shipping": 6.95,
"total": 7.84,
"free_return": false,
"voucher": false,
"availability_code": "green",
"availability_text": "Do. 17.09.–Sa. 19.09.2026",
"direct_sale": false
},
{
"seller_name": "Krebs & Eckert GmbH Spielwaren u. Geschenkartikel",
"shop_url": "http://www.ideeundspiel.com",
"shop_type": "marketplace-shop",
"marketplace_name": "ideeundspiel.com",
"seller_id": "0b5e156c-77c2-49ef-bb72-b2be03befac3",
"shop_review_rating": 0,
"shop_review_count": 0,
"position": 5,
"condition": "new",
"currency": "EUR",
"price": 0.89,
"shipping": 5.19,
"total": 6.08,
"free_return": false,
"voucher": false,
"availability_code": "green",
"availability_text": "bis Di. 22.09.2026",
"direct_sale": false
},
{
"seller_name": "schuettewelt.de",
"shop_url": "http://www.schuettewelt.de",
"shop_type": "standalone-shop",
"marketplace_name": "N/A",
"shop_review_rating": 4.9,
"shop_review_count": 11,
"position": 6,
"condition": "new",
"currency": "EUR",
"price": 0.99,
"shipping": 5.95,
"total": 6.94,
"free_return": false,
"voucher": false,
"availability_code": "green",
"availability_text": "Di. 15.09.–Mi. 16.09.2026",
"direct_sale": false
},
{
"seller_name": "wegmann1855",
"shop_url": "http://www.ebay.de/usr/wegmann1855",
"shop_type": "marketplace-shop",
"marketplace_name": "eBay",
"seller_id": "dRTQnjZTSau",
"shop_review_rating": 4.9350000000000005,
"shop_review_count": 17372,
"position": 7,
"condition": "new",
"currency": "EUR",
"price": 1,
"shipping": 4.69,
"total": 5.69,
"free_return": false,
"voucher": false,
"availability_code": "green",
"availability_text": "Mi. 16.09.–Do. 17.09.2026",
"direct_sale": false
},
{
"seller_name": "idee-shop.com",
"shop_url": "http://www.idee-shop.com",
"shop_type": "standalone-shop",
"marketplace_name": "N/A",
"shop_review_rating": 5,
"shop_review_count": 1,
"position": 8,
"condition": "new",
"currency": "EUR",
"price": 1.29,
"shipping": 4.99,
"total": 6.28,
"free_return": false,
"voucher": false,
"availability_code": "green",
"availability_text": "Di. 15.09.–Do. 17.09.2026",
"direct_sale": false
},
{
"seller_name": "buecher.de",
"shop_url": "http://www.buecher.de",
"shop_type": "standalone-shop",
"marketplace_name": "N/A",
"shop_review_rating": 3,
"shop_review_count": 732,
"position": 9,
"condition": "new",
"currency": "EUR",
"price": 2.99,
"shipping": 2.95,
"total": 5.94,
"free_return": false,
"voucher": false,
"availability_code": "green",
"availability_text": "Di. 15.09.–Fr. 18.09.2026",
"direct_sale": false
},
{
"seller_name": "VaVaDo",
"shop_url": "http://www.metro.de/marktplatz",
"shop_type": "marketplace-shop",
"marketplace_name": "metro.de/marktplatz",
"seller_id": "53bfd718-e619-493d-88e6-b8165183eeb7",
"shop_review_rating": 0,
"shop_review_count": 0,
"position": 10,
"condition": "new",
"currency": "EUR",
"price": 3.33,
"shipping": 0,
"total": 3.33,
"free_return": false,
"voucher": false,
"availability_code": "orange",
"availability_text": "Mo. 21.09.–Mi. 23.09.2026",
"direct_sale": false
},
{
"seller_name": "galaxus.de",
"shop_url": "http://www.galaxus.de",
"shop_type": "standalone-shop",
"marketplace_name": "N/A",
"shop_review_rating": 4.56,
"shop_review_count": 2559,
"position": 11,
"condition": "new",
"currency": "EUR",
"price": 3.89,
"shipping": 3,
"total": 6.89,
"free_return": true,
"voucher": false,
"availability_code": "green",
"availability_text": "Sa. 19.09.–Di. 22.09.2026",
"direct_sale": false
},
{
"seller_name": "Shop-Friseur",
"shop_url": "http://www.shop-apotheke.com",
"shop_type": "marketplace-shop",
"marketplace_name": "shop-apotheke.com (Marktplatz)",
"shop_review_rating": 0,
"shop_review_count": 0,
"position": 12,
"condition": "new",
"currency": "EUR",
"price": 31.99,
"shipping": 2.9,
"total": 34.89,
"free_return": false,
"voucher": false,
"availability_code": "green",
"availability_text": "Do. 17.09.–Sa. 19.09.2026",
"direct_sale": false
},
{
"seller_name": "aboutyou.de (Marktplatzhändler)",
"shop_url": "http://www.aboutyou.de",
"shop_type": "marketplace-shop",
"marketplace_name": "aboutyou.de (Marktplatzhändler)",
"seller_id": "3077",
"shop_review_rating": 1,
"shop_review_count": 1,
"position": 13,
"condition": "new",
"currency": "EUR",
"price": 169,
"shipping": 0,
"total": 169,
"free_return": false,
"voucher": false,
"availability_code": "green",
"availability_text": "Mi. 16.09.–Do. 17.09.2026",
"direct_sale": false
}
],
"shipping_known": 13
},
"success": true,
"updated_at": "2026-09-14T08:08:42.724Z",
"trust": {
"score": 0.94,
"components": {
"identity": 1,
"completeness": 0.71,
"price_integrity": 1,
"offer_contamination": 1,
"freshness": 1
},
"flagged_offers": []
},
"served_from": "live",
"observed_at": "2026-09-14T08:08:48.191Z"
}
]
}Coverage
One API. Every marketplace that matters
Query any of these sources with the same request shape.
Amazon
Pricing, Buy Box, offers, ratings, and seller data across 22 Amazon marketplaces.
View API details →
Google Shopping
Live comparison prices and merchant listings across 48 supported markets.
View API details →
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ebay
Offers, sold listings, bidding data, and seller analytics from 18 ebay markets.
View API details →
Walmart
Prices, availability, and seller data from Walmart US, Canada and Mexico.
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Idealo
Full merchant offers, price comparisons, and ranking data across DACH and Europe.
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Otto
Product pricing and marketplace data from Germany's largest non-Amazon retailer.
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billiger.de
Price comparison data and merchant listings from billiger.de.
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Kaufland
Marketplace and retail pricing from Germany's fastest-growing marketplace.
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Lidl
Discounter pricing and promotional cycles across DACH and wider Europe.
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Guenstiger
Merchant offers and price comparison data from guenstiger.de.
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AliExpress
Destination-aware pricing, seller, and shipping data from AliExpress global.
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Rakuten
Pricing, points-back signals, and seller data from Rakuten Japan.
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Try It
Ready to try it against your own SKU list?
Start free with 1.000 one-time credits. No credit card required.
What You Can Monitor
What Competitor Price Monitoring Actually Tracks
Price changes
Every list price and effective price move, with previous and new values.
Price
Buy-box owner
Detect when a competitor wins or loses the buy box on a listing.
Buy Box
Stock status
In-stock, out-of-stock and low-inventory signals per SKU and seller.
Stock
Seller count
Track how many sellers are competing on a given listing over time.
Sellers
Promo & coupons
Detect coupon codes, percentage promos and lightning deals as they appear.
Promo
Shipping cost
Delivery price and estimated arrival, factored into landed-cost logic.
Shipping
By Marketplace
What Competitive Intelligence Looks Like, by Marketplace
Every source exposes a different competitive signal, some show you who else is selling and how they're rated, some show completed sales, some don't have competing sellers at all and are better read as an external benchmark.
Track FBA vs. third-party seller competition, feedback ratings, and offer counts per SKU, the mix of fulfillment types selling against you is itself a competitive signal on Amazon, not just the prices involved.
eBay uniquely exposes completed-sale data, not just current asking prices, feeding actual clearing prices and buyer conditions into pricing models that learn from what items really sold for, not just what sellers are asking.
Track resolved merchant identities, trust ratings, and offer positions on Idealo to model competitive pressure per category, merchant trust score is a real factor in Idealo's own ranking, so it's part of the competitive picture, not just price.
Track competing offers, delivery promises, and seller trust signals on Otto, since Otto's own Buybox algorithm weighs delivery time and seller trust alongside price, the same signals matter for reading competitive pressure, not just for winning the Buybox itself.
Track competing offers and seller counts across all five Kaufland markets (Germany, Poland, Czechia, Slovakia, Austria), competitive intensity varies significantly by market, with the non-German markets currently far less crowded.
billiger.de's cost-per-click merchant billing model means visibility is partly a function of how much a competitor is willing to spend to stay ranked, not price alone, track resolved merchant identities and offer positions to see who's actively competing for visibility across billiger.de's 100M+ listed products.
Because merchant placement can't be bought on guenstiger.de, the price you observe is the actual ranking signal, with nothing else to account for, track exactly which price wins the top spot across 2.000+ retailers.
AliExpress's parallel-listing structure (each seller keeps a separate listing rather than competing on one shared page, see how that affects repricing →) also shapes competitive intelligence: track which listings carry the Choice badge (guaranteed 15-day delivery, free returns, free shipping), a preference signal that shifts buyer behavior independent of price, and how many sellers are listing a given product, since seller density itself signals how aggressively a category is being undercut.
Rakuten Ichiba runs a "digital shopping mall" model, every seller has an independently branded storefront, with no shared listing merging competing offers (see how that affects repricing →). Separately: a listed price alone doesn't determine the best deal a shopper actually sees, since Rakuten Super Points (redeemable across Rakuten's wider ecosystem) change the effective price, worth tracking with that adjustment in mind, not just the sticker price.
Lidl isn't a marketplace with competing sellers, so intelligence here means two different things: tracking Lidl's weekly Aktionsprospekt promotional-flyer cycle to anticipate discount-channel price pressure before it reaches your own listings, and monitoring pricing on Lidl's private-label lines (Parkside, Silvercrest, Crivit, and others) to understand discount-channel pressure on branded equivalents.
Google Shopping's competitive signal is tightly coupled to paid visibility, not just price, feed live competitor prices, positions, and merchant ratings across the 48 supported markets into Google Ads bidding strategy, since standing out in the comparison view depends on bid strategy as much as price positioning.
How Buyers Use It
Feed a Repricer. Fire an Alert. Land It in Your Warehouse
01
Repricing engines
Feed the fetched data directly into your repricer. React on the cadence that fits your SKU tier.
Feeds → repricer inbound
02
Market intelligence teams
Track competitor price moves, assortment gaps and promo launches across the market, without polling every SKU on every marketplace yourself.
Feeds → BI / alerting
03
Category managers
Land responses in BigQuery or Snowflake. Build the dashboards your team actually needs.
Feeds → BigQuery / Snowflake
Self-Serve
One Credit. One Resolved SKU
Product matching, product page, and offers, billed as a single credit.
01
Product Matching
Identify the correct product within the requested source using GTIN or URL.
02
Product Page
Title, brand, specs, images, and category, fully normalized.
03
Offers
Every seller, price, condition, and shipping option in the offer section.
Entry Price
€79 / mo
Included
10k credits / mo
Included Usage
Up to 20k SKUs / mo
Amazon, Walmart & ebay count 2 SKUs per credit. Every other source counts 1.
Free tier available · 1.000 one-time credits, no credit card required.
Enterprise
Need Custom Pricing, SLAs, or Support?
Dedicated volume pricing, custom SLAs, and direct engineering support for teams running millions of SKUs.
Talk to Saleskwery is a competitor price monitoring API for retail teams. Submit a list of GTINs or ASINs across Amazon, Google Shopping, eBay, Walmart, and 8 more sources. kwery fetches the current listing from each marketplace, validates price, Buy Box owner, seller count, and stock status, and returns a single GTIN-matched, normalized payload. Use it to feed a repricer, trigger alerts, or land data in your warehouse. One schema, resolved live. No dashboard to maintain.
Competitor price monitoring is the practice of regularly tracking competitors' prices, stock levels, buy-box owners and promotions across the marketplaces where you sell. Retailers use it to feed repricing engines, protect MAP policies and alert their teams when meaningful market changes happen.
You send kwery a list of GTINs, ASINs or product URLs and specify the marketplaces you care about, Amazon, Google Shopping, eBay, Walmart, Idealo and 7 more. For each request, kwery fetches the current listing from every marketplace, validates the fields and returns a single normalized payload with price, buy-box owner, seller count, stock, promos and shipping. You can call the endpoint synchronously for single lookups (wait) or receive results at a signed callback URL.
Those tools are closed dashboards with their own UI and workflow. kwery is API infrastructure. Use kwery when you already have a repricer, BI stack or alerting flow and need reliable, validated data to feed it, without paying for a UI you won't use.
Yes. Every response includes seller identity and observed price, so your own policy system can compare those fields with the MAP floor and reseller rules your organization maintains.
Every result is resolved live from the marketplace at the moment of your request, not from an internal poll. You control exactly how fresh you need it with the `max_age` parameter, set it to 0 for a guaranteed live fetch every time.
Yes. Every response includes the current buy-box owner, seller count, stock status, promo flags and shipping cost alongside the price, wherever the source itself exposes them.
Yes. Most teams call kwery on a cadence that fits their SKU tier (e.g. hourly for hot SKUs, daily for the long tail), diff the response against their last stored value, and route only meaningful deltas, e.g. `delta_pct > 1%` or `buy_box_seller` changed, into their repricer or alerting.
Point your ingestion pipeline at the kwery response, either poll our endpoint on your schedule or receive it at your callback URL. The payload is stable, signed with HMAC and idempotent, safe to retry, safe to fan out to multiple consumers.
One API Key. Every Competitor Price, Live
Pay only for the requests you make.
Enterprise SLA
Global Scale