The Price Data Layer for
    Ecommerce Winners

    Real-time price and offer data from Amazon, Google Shopping, eBay, idealo and 8 more marketplaces in 71 countries, via one API. Send a GTIN, ASIN or other marketplace ID, get the matched listing as validated JSON with a trust score and audit trail.

    Get API KeyView Pricing
    · 1,000 free credits, no credit card required · Plans from €79/mo
    Countries
    71
    Marketplaces
    12
    SKUs per month
    100M
    Infrastructure since
    2016

    Coverage

    Track the Marketplaces
    That Matter

    Query live marketplace and shopping-channel price data from one endpoint. Send a GTIN or product identifier and get validated results.

    Available sources12 live

    Smart Data Delivery

    From Snapshots to Signals

    kwery provides the decision-ready infrastructure for high-volume pricing. We move beyond "dumb" daily dumps to deliver actionable marketplace intelligence.

    Smart change events

    A change event is emitted only when the retrieved data shows a material change: price, offer count or Buy Box. No more processing 500 MB daily files to find 12 relevant price changes.

    Fewer mistakes. Better margins.

    {
  "marketplace" amazon.de,
  "key" gtin,
  "value" 4006381018258,
  "change" major,
  "price" {
    "from" 13.20,
    "to" 11.49
  },
  "offers" {
    "from" 6,
    "to" 7
  }
}

    Data Health & Confidence

    One number that tells you whether to trust this price. Every data point includes a reliability score covering match confidence, stock status, and offer authenticity, so you know it's the right product, before you reprice.

    Cleaner inputs. No cascades.

    {
  "trust" {
    "score" 0.92,
    "detail" {
      "identity" 1.00,
      "completeness" 0.89,
      "price_integrity" 0.95,
      "offer_contamination" 1.00,
      "freshness" 0.75
    },
    "flagged_offers" []
  }
}

    Audit & Provenance

    Every result is logged with URL, status, timestamp, GEO and job type. When a pricing decision is questioned, we provide a complete audit trail showing exactly which data triggered it and when.

    Debug fast. Prove what happened.

    {
  "crawl_id" 01J3R5T7Z9,
  "marketplace" amazon.de,
  "key" gtin,
  "value" 4006381018258,
  "observed_at" 2026-05-18,
  "http_status" 200,
  "duration_ms" 2415,
  "snapshot" {
    "price" 11.49,
    "offers" 7
  }
}

    Want to know more?

    View Documentation

    Audience

    One Data Layer.
    Three Ways to Use It.

    kwery is the pricing data foundation behind retailer pricing decisions, repricing engines, and multichannel platforms, built to fit however your team already works.

    Retailers

    Track the competitors that actually matter to your market, not every marketplace, just the ones relevant to your footprint. No noise from sources your customers never compare you against.

    Dynamic Pricing Platforms

    Feed your engine with pricing data you don't have to maintain yourself, reliable coverage instead of fragile scrapers or gaps in Seller API access.

    Multichannel Platforms

    A dependable data supplier behind your product, normalized, resellable pricing you can build on instead of running your own ingestion pipeline.

    Building an AI shopping agent? Feed it live, matched price data from 12 marketplaces. AI Shopping Agents →

    Serving a niche outside these three? Talk to us

    Operational Fit

    Your Logic Stays Yours

    kwery delivers validated, high-throughput price data. You keep every pricing decision, rule, and threshold, running on infrastructure built to hold up at production scale.

    RULES

    No Black-Box Repricing

    Build your own algorithms without being forced into rigid, one-size-fits-all vendor logic.

    if margin < 0.12: hold_price
    elif buybox_lost: match - 0.01
    else: maintain
    STACK

    Plug Into Any Environment

    Feed clean, structured data into whatever your team already runs.

    curl -X POST https://api.kwery.co/stream \
  -H "Authorization: Bearer $KWERY_API_KEY"
    CONFIG

    Full Control

    You decide the scope of each job, cache freshness, and where results are delivered.

    Scope1 – 100,000 SKUs
    Cache freshness1200s
    Deliveryhttps://your-app.com/kwery/results
    >50K
    checks / min

    High Throughput

    Scale to millions of price checks per day without breaking your data pipeline.

    1
    unified schema

    Standardization

    One stable schema across all marketplaces. Write repricing logic once, it works everywhere.

    100%
    audit coverage

    Transparency

    Debug repricing mistakes faster with full audit trails per price point.

    0
    cost on failure

    Accountable Reliability

    You never pay for our errors. Blocked lookups, timeouts, and system drops cost 0 credits.

    Get API KeyView Documentation

    Evaluating for high-volume or Enterprise use? Talk to Sales

    Native Integration

    Runs Inside Your Stack.
    Not on Top of It.

    kwery feeds the tools your team already owns, pricing engines, ERPs, data warehouses, internal dashboards. If you build pricing logic, for yourself or for clients, kwery fits.

    kwery engine core

    01Repricing

    Repricing Engines

    Push optimized prices into your existing engine.

    02Warehouse

    Data Warehouses

    Stream normalized rows into Snowflake, BigQuery, Redshift.

    03Channels

    Multichannel Platforms

    Feed Channable, Productsup, plentymarkets, and peers.

    04Analytics

    BI & Analytics Tools

    Power Looker, Tableau, and Metabase dashboards directly.

    05Internal

    Internal Price Systems

    Wire kwery into in-house pricing services via API.

    06Agency

    Agency-built Dashboards

    Drop into client dashboards as a managed data layer.

    Works With Your Cloud Stack

    AWS
    GCP
    Snowflake
    BigQuery
    Python
    Node.js

    Support

    Common kwery Questions

    The questions teams ask most often before they integrate. Full answers live in the knowledgebase.

    Browse all FAQs

    kwery is price data infrastructure for e-commerce. We deliver decision-ready marketplace pricing data via a native API, real-time change events, health signals, and full auditability. You stay in control of your repricing logic; kwery is the reliable data layer underneath it. How it works.

    Keepa and Rainforest API focus on Amazon. kwery covers Amazon plus 11 other marketplaces, including idealo, Otto, Kaufland, billiger.de and Google Shopping, from one endpoint and one schema. Every result comes with a trust score, change events and an audit trail. Compare alternatives.

    No. kwery is the data layer underneath whatever pricing logic you already run. Your ERP, PIM, repricer, or custom engine keeps full control. We only deliver the marketplace data they consume.

    Yes. kwery is API-first and emits structured JSON, so you can land events directly in a warehouse, feed them into a custom pricing engine, or route them through your existing ETL. Architecture and integration model.

    No data provider can honestly claim 100% accuracy from public marketplace surfaces; they change constantly. What we guarantee is transparency: every record carries a confidence score, every result is timestamped and traceable, and questionable values are flagged rather than passed off as fact.

    Every result is resolved live from the marketplace, not pulled from a static or aggregated feed, even inside a large batch job, each SKU is fetched at the moment it's actually processed, not pre-fetched from a snapshot taken when the job started. Every record carries an observed_at timestamp and a served_from flag showing whether it came from a live fetch or cache, and you control exactly how fresh you need it with the max_age parameter (in seconds, default 1200/20 minutes): set it to 0 for a guaranteed live fetch every time, or allow a window so a request doesn't trigger a redundant fetch when nothing's likely to have changed. Learn more about our data quality.

    Every kwery customer, from Free and Starter through Growth and Enterprise, integrates against the same API. Self-serve tiers have published per-credit pricing and standard limits, while Enterprise adds a full SLA, dedicated support with engineering response times, custom sources, and negotiated volume sized to your real traffic during onboarding. See plans.

    kwery is billed in credits. On Amazon, Walmart and eBay, 1 credit covers 2 SKUs; on all other marketplaces, 1 credit covers 1 SKU. Cached responses and failed requests are free, and credits never expire. Every account starts with 1,000 free credits, no credit card required. Starter costs €79 per month for 10,000 credits. Growth plans cost €399, €699 or €999 per month for 100,000, 200,000 or 400,000 credits. Annual billing saves about 20%. Enterprise pricing is based on volume. Prices exclude VAT for businesses. See plans.

    kwery is operated by kwery GmbH, based in Grünwald, Germany. kwery tracks 100 million SKUs per month across 12 marketplaces in 71 countries, on crawling infrastructure in production since 2016. The kwery API and its data are hosted in Germany, in line with GDPR. About kwery.

    Ready to Upgrade Your Pricing Infrastructure?

    Feed your pricing logic with trustworthy data. Get your API keys today, or talk to our team about enterprise access.

    Get API KeyTalk to Sales
    Free Tier Available
    Enterprise SLA
    Global Scale