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Pricing as a leading indicator

Discount depth and stockout frequency move before reported revenue does. They are observable weekly, in public, for every seller that lists online.

Depth, stockouts, assortmentSignalsWeekly or betterCadenceNDJSON, ParquetFormat

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Three series that lead

How deeply a seller is discounting, how often it is out of stock, and how quickly its assortment is turning over. Each is computable from an append-only record without asking the seller anything.

Market research

Series, not dashboards

The export is the product. A dashboard someone else framed is a set of decisions already made on your behalf.

Endpoints that do this

Where it lands in the API.

GET /v1/exports

Bulk export

The whole index, or your slice of it, as newline-delimited JSON or Parquet. Analysts should not paginate through an API to build a model.

→ reference
GET /v1/products/{id}/history

History

The observation series. Append-only — nothing is ever updated, so a replay reconstructs exactly what you were told and when.

→ reference
GET /v1/sellers

Seller directory

Every seller in the index, with how it is accessed, refresh cadence, identity strength and coverage. Coverage you can audit rather than take on faith.

→ reference

Questions

Common questions.

How far back does history go?

History begins when collection begins for a given listing — it cannot be backfilled, which is precisely why it is the durable asset. Coverage age is reported per seller.