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The New York Department of State’s Division of Corporations keeps the register of every corporation, limited liability company, partnership and other entity formed in New York or authorized to do business there. For each active entity: its name and DOS ID, when it first filed, its county, jurisdiction and type, and who the filing names: the address for service of process, the chief executive, the registered agent and the principal office. A Delaware company registered to do business in New York appears with jurisdiction DELAWARE. Brought up to date weekly.
The Department publishes active entities only. An entity that dissolves, merges or is revoked leaves the list, and stops matching here at the next weekly update; found: false on a DOS ID that was once active means it no longer is.
The whole source, organized and ready to query: every endpoint on this page answers in milliseconds. Every response carries as_of: how current the data is. How datasets work.

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Search entities

POST /us/ny-dos/corporations-search/v1 Dataset Searches every active entity by any combination of name, type, place and filing date.
Returns as_of, the applied filters, total, page, per_page, total_pages, count and corporations[], by name. Every entity carries dos_id (the Department of State’s id), name, initial_filing_date, county, jurisdiction (where it was formed), entity_type, and four parties, each { name, address_1, address_2, city, state, zip } or null: process (where the Department mails service of process), chief_executive, registered_agent and location (the principal executive office). Empty fields are null. Categories are upper-cased, as the Department writes most of them.

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One entity

POST /us/ny-dos/corporation/v1 Dataset Resolves one entity by its DOS ID.
Returns found, dos_id, as_of and corporation (null when not found). Every entity carries dos_id (the Department of State’s id), name, initial_filing_date, county, jurisdiction (where it was formed), entity_type, and four parties, each { name, address_1, address_2, city, state, zip } or null: process (where the Department mails service of process), chief_executive, registered_agent and location (the principal executive office). Empty fields are null. Categories are upper-cased, as the Department writes most of them.
The Department publishes active entities only. An entity that dissolves, merges or is revoked leaves the list, and stops matching here at the next weekly update; found: false on a DOS ID that was once active means it no longer is.

Full reference

Schemas, all response fields, and an interactive playground.