Look up any business registered in all 50 states and DC through one REST endpoint: status, registered agent, formation date and filings. Your first 50 lookups are free.
Try it. Pick a state, type a business name.
Stop stitching together fifty government websites. Get clean, queryable Secretary of State data behind one key.
A single POST call covers every state. No per-state integrations, no scrapers to babysit.
Fresh lookups when you need them, millisecond responses from cache when you don’t.
Status, entity type, formation date, registered agent, and principal address — normalized.
Full national coverage from one consistent schema. The state is just a parameter.
Go beyond entities with UCC filings and officer / person search.
Predictable JSON, clear errors, and pricing that scales linearly with you.
Type a business name — SOSfinder asks the state’s official registry and hands you the record. Everything below builds on that one call.
Your question
The official record
Confirm a company is real, active, and in good standing before you sign, ship, or pay.
See whether your company name is already taken in the state — before the paperwork.
Get alerted when a company you track changes status, registered agent, or address.
Upload a CSV and verify hundreds of entities across states in one run.
Officers, filing history, annual reports — with free state PDFs where offered.
Plug the hosted MCP server into Claude or Cursor and ask in plain English.
One endpoint, predictable JSON. Authenticate with a secret key from your server, pass a name and a state, and get a normalized entity record back.
GET https://api.sosfinder.com/search
?state=WY
&business_name=Acme LLC
x-api-key: sk_live_••••••••••••Start free, then pay for what you look up. Every result is cached, so you’re never billed twice for the same record.
For prototypes and evaluation.
For side projects going live.
For production apps getting started.
For high-traffic products.
For volume & compliance needs.
Need flexibility instead of a subscription? Buy a credit pack and use it whenever — credits never expire.
Grab a key, make your first call in minutes, and scale when you’re ready. 50 free lookups, no credit card.