Product catalog API for e-commerce and AI: what to look for

A product catalog API gives you programmatic access to product data — titles, images, prices, categories, and links. Whether you're powering an e-commerce feature or an AI shopping experience, the choice of API shapes what you can build. Here's what to evaluate.

Coverage and scale

How many products and brands are in the catalog? Can you find niche items or only top retailers? For AI and discovery, breadth matters: users expect to find something relevant for a wide range of queries. Look for tens of millions of products and tens of thousands of brands as a baseline for a "find anything" experience.

Search and relevance

Does the API support full-text search, semantic search, or both? Can you filter by category, brand, price, and availability? Relevance quality directly affects user satisfaction — test with real queries before committing.

Freshness and attribution

How often is data updated? Are product links affiliate-ready so you can earn commission? For many apps, a catalog API that combines freshness with built-in affiliate support reduces integration work and maximizes monetization.

Developer experience

SDKs (e.g. TypeScript, Python), clear docs, and a simple auth model (API key) make it easy to ship. Channel3 offers all of the above — one catalog API for e-commerce and AI, with search, filters, image search, and affiliate-ready links.