# SOSfinder, free: Business verification API

> One API for every Secretary of State.

SOSfinder's business verification API on its Free plan. It costs $0.00 per 1,000 companies. It returns 9 of the 11 key fields we check: Registered name, Entity number, Status, Good standing, Formation date, Registered agent, Principal address, Officers, Filings.
We rank 646 plans by price. [cnpjob's R$349 monthly plan](https://datacircle.dev/business-verification-apis/cnpjob/r-349-monthly/llms.txt) is the cheapest paid plan per 1,000 companies: as little as $0.023. cnpjob's plan covers companies in Brazil only. cnpjob's R$349 monthly plan covers up to 3,000,000 companies a month at no extra cost.
[INSEE](https://datacircle.dev/business-verification-apis/insee/free/llms.txt), [CZ Agents](https://datacircle.dev/business-verification-apis/cz-agents/free/llms.txt) and [ARES](https://datacircle.dev/business-verification-apis/ares/free/llms.txt) are the best business verification API providers in our benchmark.

- This page: https://datacircle.dev/business-verification-apis/sosfinder/free
- [Best business verification API in 2026: pricing compared](https://datacircle.dev/best-business-verification-api.txt)
- Get it: https://www.sosfinder.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing
- Request: `GET https://api.sosfinder.com/search`
- API key: with the plan, on https://www.sosfinder.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing
- Its API docs: https://www.sosfinder.com/docs/entity-search?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing
- Sold by: SOSfinder (https://www.sosfinder.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing)
- Checked: 2026-11-01

## In the answer

- Completeness: 82%
- Registered name: ✓
- Entity number: ✓
- Status: ✓
- Good standing: ✓
- Formation date: ✓
- Registered agent: ✓
- Principal address: ✓ town or region
- Officers: ✓
- Filings: ✓

## Price

- $ per 1,000 companies: $0.00
- Per: call
- Billing: free

## Aggregators

- Aggregators: none

## Charges

- Also pays for: /v1/monitors: 5 entities, weekly checks · from the same budget: GET /document

## Overage

- Units cap: hard

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: One API for every Secretary of State.

## Data

- Freshness: live
- Countries: United States
- Keep data: You may cache and store responses within your own application for your own use.
- Use data: You may use the Service for any lawful business purpose — verifying businesses during onboarding, enriching CRM or lead records, underwriting and diligence, monitoring the standing of entities you do business with, and building products on top of the API. What you may not do: Resell, redistribute, or sublicense raw API responses as a standalone dataset or a competing lookup service, Share, sell, or pool your API key across separate businesses or customers, Circumvent, interfere with, or misreport usage metering, rate limits, or plan quotas, Scrape our website, dashboard, or documentation, or access the Service by any means other than the documented API, Probe, attack, or attempt to reverse engineer our systems, or use the Service in a way that degrades it for others, Use the Service to harass, stalk, or profile individuals, or in any way that violates applicable law. [...] You may not use the Service, in whole or in part, to establish an individual's eligibility for credit, insurance, employment, housing, or any other purpose regulated by the FCRA.

## Plan

- Pay: $0
- You get: 50 credits a month
- Enough for: 50 calls a month
- Expires: at the start of each billing cycle

## Rate limit

- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: state, business_name. Optional: by
- Method: GET
- Path: /search

## About the plan

- Plan: Free
- Who can get it: anyone with an account, for a lawful business purpose

## The 45 fields the plan's answer can hold

match found, state, state name, searched name, searched by, similar entities, registered name, entity number, secondary entity number, previous names, status, status reason, sub-status, legal entity type, legal entity type description, good standing, AR standing, RA standing, revenue standing, other standing, formation date, effective date, dissolution date, revival date, jurisdiction, federal employer ID, NAICS code, NAICS description, registered agent name, registered agent address, registered agent city, registered agent state, registered agent ZIP code, service of process name, service of process address, officers, principal office address, mailing address, filings, filing history, annual reports, documents, registry record URL, detail page available, raw state record

## SOSfinder's plans (6)

- [SOSfinder, free](https://datacircle.dev/business-verification-apis/sosfinder/free/llms.txt): $0.00 per 1,000, 82% complete, live
- [SOSfinder, top-up from $9](https://datacircle.dev/business-verification-apis/sosfinder/top-up-from-9/llms.txt): $90.00 per 1,000, 82% complete, live
- [SOSfinder, $49 monthly](https://datacircle.dev/business-verification-apis/sosfinder/49-monthly/llms.txt): $49.00 per 1,000, 82% complete, live
- [SOSfinder, $99 monthly](https://datacircle.dev/business-verification-apis/sosfinder/99-monthly/llms.txt): $39.60 per 1,000, 82% complete, live
- [SOSfinder, $449 monthly](https://datacircle.dev/business-verification-apis/sosfinder/449-monthly/llms.txt): $29.933 per 1,000, 82% complete, live
- [SOSfinder, contact us](https://datacircle.dev/business-verification-apis/sosfinder/contact-us/llms.txt): 82% complete, live

## SOSfinder's calls (1)

- `GET /search`: [SOSfinder, free](https://datacircle.dev/business-verification-apis/sosfinder/free/llms.txt)

## SOSfinder's APIs (1)

- [SOSfinder: business verification API pricing, 6 plans](https://datacircle.dev/business-verification-apis/sosfinder/free/llms.txt)

## SOSfinder: business verification API alternatives

- [Scavio, top-up from $25](https://datacircle.dev/business-verification-apis/scavio/top-up-from-25/llms.txt): $10.00 per 1,000, 45% complete, live
- [Parse, $30 monthly, Hobby, GET /scraper/8ceea6f9-34d2-4d7f-adf1-fc7bdd90b476/search_entities](https://datacircle.dev/business-verification-apis/parse/30-monthly-hobby-get-scraper-8ceea6f9-34d2-4d7f-adf1-fc7bdd90b476-search-entities/llms.txt): $30.00 per 1,000, 55% complete, live
- [OpenSOSData, $500 pack, Enterprise, POST /v1/lookup](https://datacircle.dev/business-verification-apis/opensosdata/500-pack-enterprise-post-v1-lookup/llms.txt): $31.40 per 1,000, 100% complete, live
- [Strale, pay as you go, x402 (USDC on Base), GET /x402/v2/belgian-company-data](https://datacircle.dev/business-verification-apis/strale/pay-as-you-go-x402-usdc-on-base-get-x402-v2-belgian-company-data/llms.txt): $54.00 per 1,000, 64% complete, live

## Sources

From each provider's own pricing page and docs, and from what providers tell us. We read this row from these pages on 2026-11-01.

- https://www.sosfinder.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing
- https://www.sosfinder.com/docs/api-credits?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing
- https://www.sosfinder.com/docs/entity-search?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing
- https://www.sosfinder.com/docs/rate-limits?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing
- https://www.sosfinder.com/llms.txt?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing
- https://www.sosfinder.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing
- https://www.sosfinder.com/terms?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=business-verification-api-pricing