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E-commerce

Cross-Platform Search

Definition updated April 2026

What is cross-platform search?

Cross-platform search is an API query that retrieves results from multiple data sources or retailers simultaneously and returns them as a unified response. Instead of making separate calls to Amazon, Walmart, and Best Buy and merging the results yourself, a cross-platform search API handles the aggregation.

This dramatically simplifies the development of price comparison tools, shopping aggregators, and multi-source analytics dashboards. The Klarna Ecom API is an example - a single query returns normalized product results from multiple participating stores.

The value grows with the number of platforms covered. For developers, one integration replaces many; for end users, one query replaces many searches. When evaluating cross-platform APIs, check store and region coverage, result quality, and whether the normalization is sufficient for your comparison use case.

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Retail APIs