Amazon is where most sellers, brands, and agencies start. It is the biggest single pool of demand in e-commerce, so it makes sense that the first data API you reach for is an Amazon one. That is exactly what we built Asgard to be — the fastest, most accurate real-time Amazon data API on the market.
But Amazon is rarely where the market actually ends. The same product that ranks on Amazon is often selling on Walmart, listed on Target, and going viral on TikTok Shop at the same time. If your data only covers one of those surfaces, you are making decisions with one eye closed.
The problem with one marketplace at a time
Most teams solve multi-marketplace data the painful way: one vendor for Amazon, a different scraper for Walmart, a third tool for Target, and something hacked together for TikTok. Each has its own auth scheme, its own rate limits, its own response shape, and its own definition of what a "product" or a "rank" even is.
The result is predictable:
- Five integrations to maintain instead of one, each breaking on its own schedule.
- Five different data models your team has to normalize before any of it is comparable.
- Five billing relationships and five sets of reliability guarantees to track.
- No single source of truth when you want to ask a simple cross-marketplace question like "where is this ASIN cheapest right now?"
By the time you have glued it all together, you have built an integration layer that is more fragile than the product you were actually trying to ship.
Why a unified marketplace API wins
The alternative is one API that speaks every marketplace with a consistent request and response contract. Same auth. Same query structure. Same normalized fields for price, rank, availability, and seller — no matter which marketplace the data came from.
That unlocks the questions that actually matter:
- Track a product's price and rank across Amazon, Walmart, and Target in a single dashboard, with numbers that are directly comparable.
- Catch a competitor undercutting on one marketplace while holding price on another.
- Connect a TikTok Shop trend to real demand and pricing movement on the marketplaces where that product also sells.
- Add a new marketplace to your product without a new vendor, a new contract, or a new integration sprint.
If you need all marketplaces in one API
This is exactly why we built Uncovar — a unified, real-time data API that covers more than just Amazon. If your use case has outgrown a single marketplace and you need Walmart, Target, TikTok Shop, and more behind one consistent endpoint, that is where to go.
You get the same philosophy that drives Asgard — real-time data scraped the moment you make the request, not stale rows from a database that refreshes on someone else's schedule — extended across every marketplace that matters, through a single API you only have to integrate once.
Start with Amazon if Amazon is your world. But the moment "just Amazon" stops being enough, you should not have to bolt on four more vendors to keep up. One unified API is the cleaner answer — and it is ready at uncovar.world.