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OpenSOSData: business verification API pricing, 10 plans, POST /v1/bulk-lookup/upload

OpenSOSData's sitellms.txt

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100% complete: all 11 key fields we checkSee the 11 fields
$0.00per 1,000 companiesWe rank 21 plans by price. OpenSOSData's $500 monthly plan (/v1/lookup) costs the least per 1,000 companies: $5.00.
Plan: Free one of OpenSOSData's 10 plans
Call: POST /v1/bulk-lookup/upload one of OpenSOSData's 3 calls
API: Business verification API OpenSOSData's only API

About this item

  • Live. OpenSOSData reads the register when you call the API.
  • All 11 key fields we check. Registered name, Entity number, Tax ID, Entity type, Status, Good standing, Formation date, Registered agent, Principal address, Officers, Filings.
  • Nothing to pay. You get 10 credits once, enough for 10 results.
  • One call. You call POST /v1/bulk-lookup/upload. You send CSV file body with columns entity_name and state. You set the Content-Type header to "text/csv". You can also send search_by, max_results, type and cache_preference. The call returns a job. You fetch the answer once the job is done.
  • Who can get it: new accounts, once on signup, no credit card required. Keep data: no limit. Use data: with conditions.

Sources

From each provider's own pricing page and docs, and from what providers tell us. We read this row from these pages on 2026-10-27.

  1. opensosdata.com
  2. opensosdata.com/docs/
  3. opensosdata.com/docs/changelog.html
  4. opensosdata.com/llms.txt
  5. opensosdata.com/openapi.yaml
  6. opensosdata.com/terms

Product details

The key fields this plan's answer can hold, then each filled column in its row on the sheet.

  • Registered name
  • Entity number
  • Tax ID
  • Entity type
  • Status
  • Good standing
  • Formation date
  • Registered agent
  • Principal address
  • Officers
  • Filings
Price
$ per 1,000 companies$0.00
Perresult
Billingfree
Charges
Also pays forfrom the same budget: Look up a business entity or UCC filing by name and state · Submit a bulk entity lookup job · Check business name availability
Not found
$ per 1,000$0.00
In their words
Their pitchUpload a CSV file containing entity names and states for bulk lookup.
Data
Freshnesslive
Plan
Pay$0
You get10 credits
Enough for10 results, once
Rate limit
Per second0.17
Batch1,000
Speed
Answerby polling
The call
You sendContent-Type header "text/csv", CSV file body with columns entity_name and state. Optional: search_by, max_results, type, cache_preference
Path/v1/bulk-lookup/upload
About the plan
PlanFree
Who can get itnew accounts, once on signup, no credit card required
The 74 fields the plan's answer can hold

searched name, entity name, entity type, entity type description, entity ID, state entity ID, old entity ID, EIN, status, status reason, sub-status, standing, annual report standing, registered agent standing, other standing, revenue standing, statement status, next statement due date, formation date, effective date, dissolution date, inactive date, revival date, duration date, registered agent name, registered agent address, registered agent city, registered agent state, registered agent ZIP code, registered agent mailing address, principal address, principal city, principal state, principal ZIP code, mailing address, mailing city, mailing state, mailing ZIP code, officers, filing history, annual reports, annual report due date, last annual report, last event, event date filed, event effective date, profit or nonprofit, industry, NAICS code, NAICS description, jurisdiction, authorized shares, foreign legal name, fictitious name, number of employees, primary county, county, section of law, service of process name, service of process address, fiscal month and day, periodic report month, detail screenshot URL, search results screenshot URL, filing history screenshot URL, filing history second screenshot URL, scraped at, data as of, cached, stale, result source, scraper version, scraper built at, data completeness

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