What Is a Product Feed API?

A product feed API is a web API that serves a business's product catalog on request: lookups, listings, and often writes, instead of handing it over as a file. If someone asks "what's the current price and stock for SKU-4471," a feed API answers that in one HTTP call against live data. A CSV export answers it with whatever was true when the file was generated, which might be five minutes ago or might be last Tuesday.

That distinction sounds small until you notice how much software already depends on it being wrong. A storefront that re-imports a nightly export is, by definition, selling yesterday's stock count all day. A reseller working off a spreadsheet a supplier emailed last week is quoting prices the supplier may have already changed. None of this is a bug in any one system. It's the natural result of treating a catalog as a document instead of a live source.

Feed API vs. export: what actually changes

• Freshness. An export is a snapshot; an API call reads current state. There's no "how often do we regenerate the file" question to answer, because there's no file.
• Selectivity. A file forces you to ship the whole catalog even if a consuming system only needs one category or one product. An API call asks for exactly what's needed: a single SKU lookup, a filtered listing, a paginated page of 50.
• Writes. A CSV is read-only by nature. A feed API can also accept updates - a stock booking, a bulk field change, a new product - through the same authenticated interface. The catalog stays the same live source no matter which direction data is moving.
• Multiple consumers, one source. Three systems reading the same file each interpret staleness differently depending on when they last pulled it. Three systems calling the same API all see the same current answer, at the same moment.

What a feed API is actually good for

The clearest signal you need one: more than one system needs your product data, and they don't all update on the same schedule. Think a storefront, a marketplace listing, a reseller's own site, and an internal ordering tool - four consumers, each reading a slightly different snapshot of "the truth". None of them is wrong exactly, they just don't agree with each other.

A second, sharper signal: stock actually runs out sometimes. If two systems can independently believe there's inventory left when there isn't, a feed serving live, atomically-updated stock counts is the fix. See our guide to preventing overselling for why the "check then decrement" pattern most exports imply breaks under real concurrent demand.

What it isn't for

If exactly one system reads your catalog and it's fine with data that's a day old, an export is simpler and you don't need to change anything. A feed API earns its complexity when staleness or duplication actually costs you something: a sold-out item still showing "in stock," a price change that took two days to reach a partner, a reseller's site quoting numbers your own has already moved past.

How Feedwyre approaches this

Feedwyre turns whatever you already have - a spreadsheet import, your own database on a sync schedule, or direct API writes - into one secure feed: a Query API for lookups and listings, a Manage API for creating, updating, and deleting products (plus atomic stock bookings), and optional downloadable exports for systems that still want a file. Every consumer reads the same live source, so nothing needs to be regenerated on a schedule.