# Connecticut

Company data from the Connecticut business register, through the Topograph API.

> **Beta**: this country is in early development. Some datapoints or documents may be missing, the integration may be unstable, prices may change without notice, and it is not covered by SLAs.

## Overview

Topograph reads Connecticut Business Registry (open data) and Connecticut Secretary of the State, Business Records Search and returns the company profile, legal representatives and other key persons of Connecticut companies through one API.

## Coverage

What comes back for each datapoint and document, as on the coverage matrix.

Requests run in prefill mode (fast) or verification mode (the authoritative register answer).

| Datapoint | Returned |
| --- | --- |
| Company profile | Yes |
| Legal representatives | Yes |
| Other key persons | Yes |

| Document | Returned |
| --- | --- |
| Register extract | Yes |
| Articles of association | No |
| Financials | No |
| UBO extract | No |

### Documents, as the register names them

- Connecticut SoS Business Records Search, Entity Card (printed)

### Speed

A company profile typically comes back from the register in 1 s in prefill mode and 20 s in verification mode. These are typical observations, not a service-level commitment: set your timeouts well above them.

## Sources

The registers this country’s data comes from. Secondary sources only enrich or check what the registers return.

- **[Connecticut Business Registry (open data)](https://data.ct.gov/stories/s/CT-Business-Registrations/dagr-u2hb)**: The Connecticut Secretary of the State publishes the complete state business register as five nightly open data sets on data.ct.gov: a Business Master record of every active and historical entity, separate Principal Details and Agent Details files that list officers, directors, members, partners and statutory registered agents per entity, a Business Filing History feed, and a Name Change History feed. All five datasets share the Administrative Legal Entity Identifier (ALEI) as a primary key and can be queried without authentication.
- **[Connecticut Secretary of the State, Business Records Search](https://service.ct.gov/business/s/onlinebusinesssearch)**: Official Connecticut Secretary of the State public business records search. Covers every domestic and foreign corporation, limited liability company, limited partnership, limited liability partnership, statutory trust and non-stock corporation registered in Connecticut. Searchable by business name, Administrative Legal Entity Identifier (ALEI), filing number, or principal/agent name. The portal renders an authoritative per-entity detail view with the current filing history, principals, and registered agent.
- **[GLEIF (Legal Entity Identifiers)](https://www.gleif.org/en/lei-data/gleif-golden-copy/download-the-golden-copy)** (secondary): Global Legal Entity Identifier Foundation – Legal Entity Identifier reference data

## Identifiers

Request a company by its Account Number as the `id`, with `countryCode` set to `US-CT`. Its format, validation rules and an example value are in the full reference.

## The full Connecticut reference

The full reference covers how each datapoint is sourced and mapped, the vocabularies the API returns, the documents you can order and exact example responses. It is free with a Topograph account.

| In the full reference | Entries |
| --- | --- |
| Identifiers and formats | 3 |
| Search patterns | 2 |
| Quirks | 4 |
| Legal forms | 22 |
| Officer roles | 13 |
| Company statuses | 20 |
| Documents | 1 |
| Example responses | 4 |

- Create a free account: https://www.topograph.co/sign-up?redirect_url=%2Fcountries%2Fus-ct
- Sign in: https://www.topograph.co/sign-in?redirect_url=%2Fcountries%2Fus-ct

With a session, https://www.topograph.co/countries/us-ct.md returns the full reference as Markdown. Assistants signed in to the [Topograph Wizard MCP](https://docs.topograph.co/guides/topograph-mcp) can read it there too.

## Connecticut business register guide

[Connecticut business register guide](https://www.topograph.co/guides/business-registers-in-connecticut-united-states): how the register works, what it publishes and which documents it issues.

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Source: https://www.topograph.co/countries/us-ct