Introducing SOSfinder: one API for all 50 states

Every state runs its own business registry, with its own search form, its own data shape, and its own quirks. Building anything on top of that means writing — and maintaining — fifty fragile integrations.

SOSfinder collapses all of that into one REST endpoint. Pass a business name and a state code, and you get back a normalized entity record: status, entity type, formation date, registered agent, and principal address — the same shape every time.

Results are cached, so repeat lookups are instant and free. You only pay when we fetch a fresh record from the source.

Sign up for a free key and make your first call in minutes. No credit card, 100 free lookups to start.