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The Connecticut Secretary of the State records the liens filed against Connecticut businesses and people: UCC financing statements that secure a loan or a lease on a debtor’s assets, and municipal, federal tax, labor, vessel and judgment liens. The register carries every lien that is in force, and every one that lapsed, was released or was terminated within the last year. Each lien comes whole: its status, type and lapse date, and every filing with the debtors and secured parties that filing lists and a copy of the filing’s own document. Whether it is still in force is computed each time you ask. Brought up to date daily.
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 liens

POST /us/ct-ucc/liens-search/v1 Dataset Searches the liens by any combination of party name, status, lien type and filing date.
Returns as_of, the applied filters, total, page, per_page, total_pages, count and liens[], newest first. Every lien carries id, lien_number, status (ACTIVE, RELEASED or TERMINATED), lien_type (e.g. OFS for a financing statement, MUNICIPAL, IRS, LABOR, DEPT REV SERVS, VESSEL, JUDGMENT), lapse_date (9999-12-31 when it does not lapse), filed_date, last_filed_date, filing_numbers, debtor_names, secured_party_names, in_force and filings[], oldest first. Each filing carries filing_number, filing_type (e.g. ORIG FIN STMT, AMENDMENT, CONTINUATION, RELEASE, ASSIGNMENT), accepted_date, pages, volume, start_page, the debtors[] and secured_parties[] it lists, each { name, business_name, prefix, first_name, middle_name, last_name, suffix, address: { street_1, street_2, city, state, zip } }, and its document: document_url (Croma’s copy of the filing’s PDF, byte for byte), source_document_url (the Secretary’s own link) and document_name (the name the Secretary gave the file), null until the copy is made or when the Secretary publishes none. Debtors include people, with their addresses, as the filings list them. in_force is computed by Croma when the response is served: true while the lien is ACTIVE and not past its lapse date, false otherwise. The register carries some liens as ACTIVE after their lapse date.

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One lien, whole

POST /us/ct-ucc/lien/v1 Dataset Resolves a lien by any of its filing numbers.
Returns found, filing_number (as the register writes it), as_of and lien (null when not found). Every lien carries id, lien_number, status (ACTIVE, RELEASED or TERMINATED), lien_type (e.g. OFS for a financing statement, MUNICIPAL, IRS, LABOR, DEPT REV SERVS, VESSEL, JUDGMENT), lapse_date (9999-12-31 when it does not lapse), filed_date, last_filed_date, filing_numbers, debtor_names, secured_party_names, in_force and filings[], oldest first. Each filing carries filing_number, filing_type (e.g. ORIG FIN STMT, AMENDMENT, CONTINUATION, RELEASE, ASSIGNMENT), accepted_date, pages, volume, start_page, the debtors[] and secured_parties[] it lists, each { name, business_name, prefix, first_name, middle_name, last_name, suffix, address: { street_1, street_2, city, state, zip } }, and its document: document_url (Croma’s copy of the filing’s PDF, byte for byte), source_document_url (the Secretary’s own link) and document_name (the name the Secretary gave the file), null until the copy is made or when the Secretary publishes none. Debtors include people, with their addresses, as the filings list them. in_force is computed by Croma when the response is served: true while the lien is ACTIVE and not past its lapse date, false otherwise. The register carries some liens as ACTIVE after their lapse date.

Full reference

Schemas, all response fields, and an interactive playground.