The Klarna Ecom API is not Klarna’s payment product. It is Klarna’s product discovery infrastructure - a cross-retailer shopping API that returns product search results, price history, and deal data from multiple retailers simultaneously across 13 regions.
If you are building a price comparison product, a deal discovery feed, or a consumer shopping tool that needs multi-retailer pricing in one API, this is the data source.
What the Klarna Ecom API covers
Multi-store search - search for a product and receive results from multiple retailers in the selected region in a single response. Each result includes product name, current price, retailer name, retailer logo, and product URL. This is the core value: one query, multiple retailer results.
Price history - per-product historical price data showing how pricing has changed over time across retailers. Returned as a time series suitable for rendering price history charts. The “is this the lowest price in 90 days?” signal that drives purchase confidence.
Deals - products currently at a significant discount relative to their recent price history. A deals feed surfaced to users in their region.
Product reviews - review data from Klarna’s integrated review network, linked to product records.
Category intelligence - browse categories with multi-retailer product results rather than single-retailer catalogs.
Store data - retailer metadata for covered merchants in each region.
13 regions - coverage spans Europe and North America, with different retailer sets per region.
A multi-store search query
const response = await fetch(
'https://klarna7.p.rapidapi.com/api/search?' +
new URLSearchParams({
q: 'sony wh-1000xm5',
countryCode: 'GB',
size: '20',
}),
{
headers: {
'X-RapidAPI-Key': process.env.RAPIDAPI_KEY,
'X-RapidAPI-Host': 'klarna7.p.rapidapi.com',
},
}
);
const { products } = await response.json();
// products = array of results
// Each has: name, currentPrice, retailer, url, reviewCount, reviewRatingTo get price history for a specific product from the results:
const productId = products[0].id;
const historyRes = await fetch(
`https://klarna7.p.rapidapi.com/api/products/${productId}/price-history`,
{
headers: {
'X-RapidAPI-Key': process.env.RAPIDAPI_KEY,
'X-RapidAPI-Host': 'klarna7.p.rapidapi.com',
},
}
);
const { history } = await historyRes.json();
// history = [{ date: '2025-01-15', price: 259, retailer: 'Amazon UK' }, ...]What to build with Klarna data
Price comparison website - the most direct use case. A user searches for a product; your app shows them where it is cheapest across all covered retailers in their region. The Klarna API provides this in one response.
Price drop alerts - combine the price history endpoint with a target price the user sets. Poll for the product on a schedule; notify when the current price drops to or below the target.
Purchase timing advice - show users whether now is a good time to buy. “This product is 18% below its 6-month average price” is a high-value signal. The price history data makes this a simple calculation.
Deal discovery feed - use the deals endpoint to surface a curated feed of significant price drops across covered retailers in the user’s region. Works well as a push notification, email digest, or home feed.
Affiliate comparison layer - price comparison products that drive affiliate click-through are one of the most established e-commerce monetisation models. The Klarna API provides the comparison data; you handle the affiliate link attribution and conversion tracking.
Region coverage
The 13 supported regions span major European markets (UK, Germany, France, Sweden, Netherlands, and others) and the US. The retailer set varies by region - some are regional-only, some are pan-European or global. Check the API documentation on RapidAPI for the current region and retailer coverage list.
Klarna as a complement to single-retailer APIs
The Klarna API trades depth for breadth. It covers many retailers with standard product fields but does not return nutritional data, detailed inventory, or retailer-specific attributes that specialist APIs provide (like the Tesco API’s Clubcard pricing or Kohl’s review detail).
For products that need single-retailer depth (a nutrition tracker needs the full Tesco nutritional panel), use the specialist API. For products that need cross-retailer comparison (a price comparison site), use Klarna.
