HOLLERITH DATA

Web data platform

The web, tabulated.

Hollerith turns the public web into clean, structured records, delivered live through an API, in bulk as datasets, or as analytics your team can act on.

Explore the APIBrowse datasets
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  • StructuredOne documented schema, in JSON, CSV or Parquet.
  • Time-stampedEvery field carries the moment it was observed.
  • Any scaleOne record on request, or whole catalogs on a schedule.
  • DeliveredBy API, by webhook, or straight to your storage.

Platform

From one record to the whole catalog.

Four ways to put the same clean data to work.

Hollerith API

Live records, on request.

Send a URL or an identifier and get structured JSON back: title, brand, price, availability and offers, as of the moment we looked.

REST · JSON · Real time

Hollerith Datasets

Whole catalogs, on a schedule.

Complete catalogs and their price history, refreshed on your cadence and delivered as files you can load anywhere.

JSON · CSV · Parquet

Hollerith Analytics

The market, measured.

Dashboards and reports on the catalogs you follow: price moves, assortment changes and where you stand.

Dashboards · Reports · Alerts

Custom collections

Built around your question.

A source or a cut nobody sells off the shelf? We design, run and deliver a collection made for it.

Scoped · Scheduled · Managed

Developers

One request.
One clean record.

Ask for a product by URL or identifier and get the same documented schema back, every time. No HTML to parse, no selectors to maintain, nothing to fix when a page changes.

  • Stable, versioned schema
  • Time-stamped at the source
  • Single lookups or bulk batches
  • Webhooks when a record changes
Request
$ curl https://api.hollerith.io/v1/records \
    -H "Authorization: Bearer $HOLLERITH_KEY" \
    -d url=https://shop.example.com/p/48213
Response200 OK
{
  "source": "shop.example.com",
  "title": "Noise-cancelling headphones",
  "brand": "Example Audio",
  "price": { "amount": 199.00, "currency": "USD" },
  "availability": "in_stock",
  "offers": 6,
  "observed_at": "2026-10-09T14:03:22Z"
}

Datasets

Whole catalogs, ready to load.

Pick a dataset, set the cadence and choose where it lands.

Product catalogs

Every product a storefront lists, with its attributes.

  • title
  • brand
  • category
  • gtin
  • attributes
  • url

Prices & offers

Current price, list price, discounts and how many offers compete.

  • price
  • list_price
  • discount
  • currency
  • offers

Price history

How each product’s price and availability moved over time.

  • observed_at
  • price
  • availability
  • change

Assortment changes

What was added, delisted, sold out or restocked, and when.

  • added
  • delisted
  • sold_out
  • restocked
Formats
JSON · NDJSON · CSV · Parquet
Delivery
API · Webhook · Cloud storage · Data warehouse
Cadence
One-off · Daily · Weekly · Custom

Use cases

Built for teams that run on market data.

Herman Hollerith built the machine that counted America. We tabulate the web.

The 1880 census had taken about eight years to tally by hand. Hollerith’s punch cards turned each person into a record a machine could count, and the 1890 count of 63 million Americans went dramatically faster. We’re named after him.

Say it HOL-er-ith.