Authenticate to the Baselayer API using your API key per the getting-started guide at docs.baselayer.com/docs/getting-started
First create or resolve a business entity record by POSTing to /searches with the business name and jurisdiction details to obtain a business UUID
Initiate a lien search by POSTing to /lien_searches with the business UUID; optionally pass a search_states array to target specific states, or omit it to default to the entity's domestic state
Register a webhook for the LiensSearch.completed event or poll the lien search status endpoint until the status is 'completed'
Retrieve results from the completed lien search record; the response includes normalized filing_type values and individual lien records with secured party, collateral description, and filing date
Known gotchas
Setting search_states to null restricts the search to the entity's domestic state only; explicitly pass all target state codes for a multi-state secured-party search
UCC lien data is sourced from Secretary of State databases which have varying update frequencies; some states may have a lag of several business days
The normalized filing_type field standardizes values across all 50 states, but the underlying raw filing type codes are also returned — use normalized values for cross-state comparisons
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