Look up any LLC or corporation in a US state registry — status, type, formation date, jurisdiction, and registered agent — sourced from official Secretary of State open data.
The US Business Entity Lookup API unifies state Secretary of State corporation and LLC registries behind one consistent interface. Search a state registry by entity name to find every matching company, or resolve a single entity by its state registry ID to get its full record — active status, entity type, formation date, jurisdiction of formation, home county, and registered/process agent with address. Ideal for KYC and due diligence, real estate research (identifying the people behind property-owning LLCs), credit underwriting, fraud detection, and lead enrichment. Every state returns the identical response shape, so you integrate once and get new states for free. Coverage currently spans New York, with more states added over time; call the /states endpoint for the live list. Fields a state does not publish openly — such as officers/directors — are returned as null rather than omitted, keeping the response shape stable across states.
/entity/statesReturn the states currently supported. Use the returned slug values for the state parameter on /search and /lookup.
{
"count": 1,
"states": [
{ "slug": "ny", "name": "New York", "state": "NY" }
]
}/entity/searchSearch a state corporation/LLC registry by entity name. The name is matched as a case-insensitive substring, so a partial name may return several entities.
| Name | Type | Required | Description |
|---|---|---|---|
name | string | Required | Entity name to search (partial match, e.g. "EMPIRE STATE REALTY") |
state | string | Required | State slug from /entity/states (e.g. "ny") |
limit | number | Optional | Max matching entities to return (1-100, default 25) |
{
"state": "ny",
"query": "EMPIRE STATE REALTY",
"count": 1,
"results": [
{
"state": "NY",
"registry_id": "3177151",
"entity_name": "EMPIRE STATE REALTY & MANAGEMENT OF BROOKLYN, LLC",
"entity_type": "DOMESTIC LIMITED LIABILITY COMPANY",
"status": "Active",
"formation_date": "2005-03-15",
"jurisdiction": "New York",
"county": "New York",
"registered_agent": "EMPIRE STATE REALTY & MANAGEMENT OF BROOKLYN, LLC",
"registered_agent_address": "89 HARRISON AVENUE, BROOKLYN NY 11206",
"officers": null
}
]
}/entity/lookupResolve a single business entity by its state registry ID (file number / NY DOS ID). Returns the full normalized record, or 404 if no entity has that ID.
| Name | Type | Required | Description |
|---|---|---|---|
registry_id | string | Required | State registry ID / file number (e.g. NY DOS ID "4424185") |
state | string | Required | State slug from /entity/states |
{
"state": "NY",
"registry_id": "4424185",
"entity_name": "BUTCHY'S WINE & SPIRITS, INC.",
"entity_type": "DOMESTIC BUSINESS CORPORATION",
"status": "Active",
"formation_date": "2013-06-27",
"jurisdiction": "New York",
"county": "Westchester",
"registered_agent": "BUTCHY'S WINE & SPIRITS, INC.",
"registered_agent_address": "23 BUSHNEIL PLACE, MOUNT VERNON NY 10550",
"officers": null
}