Business Entities in Colorado dataset: access card
What is the Colorado business registry?
Business Entities in Colorado dataset is a dataset of official business entity records filed with the Colorado Secretary of State, published by Colorado Department of State (CDOS). Coverage: United States — Colorado; scale: 3,066,630, according to the catalog manifest. In our data — the Aidenix Atlas catalog of verified sources — this endpoint was last probed on 2026-07-24 and returned HTTP 200. What the card gives you:
- The exact endpoint and a working request you can copy.
- Authentication and rate limits: none — no API key required.
- The query keys the source accepts and the fields it returns, verified against the live endpoint.
How do you query it?
A working query is one plain HTTP GET — in our data this exact request form was verified on 2026-07-24:
curl "https://data.colorado.gov/resource/4ykn-tg5h.json?$limit=10"
The source runs on the Socrata Open Data API, so the query grammar is the same across every Socrata portal:
- Filter with SoQL parameters:
$where,$limit,$offset. - Page size goes up to 50,000 rows per request.
- A free app token grants a dedicated rate limit, according to Socrata documentation.
- The response is plain JSON — no SDK and no signup required.
What does it accept and return?
The interface contract is a short one: 3 query facets in, 4 field groups out. The table is generated from the catalog manifest, according to the probe of 2026-07-24 — every row below was checked against the live endpoint, not copied from vendor marketing:
| Facet | Value |
|---|---|
| Endpoint | https://data.colorado.gov/resource/4ykn-tg5h.json |
| Auth | none — no API key required |
| Query by | address, place, entity record ID |
| Returns | company name, dates, owner record, economy fields |
| Provider | Colorado Department of State (CDOS) |
| Coverage | United States — Colorado |
| Last probe | 2026-07-24 — HTTP 200 |
Related sources
A related source is a dataset that joins to the Colorado business registry through shared keys, according to the join map of our catalog. In our data, each of the 3 cards below was probed on 2026-07-24 and is live:
- New York Active Corporations dataset — United States — New York.
- Oregon Active Businesses dataset — United States — Oregon.
- Connecticut Business Registry — Business Master — United States — Connecticut.
The workflow this source belongs to is covered in the full guide: Free US company registry APIs — state-by-state guide.
Source card generated from the Aidenix Atlas catalog; facts as probed on 2026-07-24.
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