Real-time registered agent, entity status, and principal address for any US business. All 50 states + DC + Puerto Rico + US Virgin Islands.
Trusted by legal tech teams, process servers, compliance teams, and AI agents
Trusted by developers, agencies, and enterprise teams
Real-time government data at API-friendly prices. Need volume? Cached data starts at $0.01/lookup.
*As low as $0.0314/lookup (live) · $0.00314/lookup (cached)
The math is irrational. The savings are not.
Side-by-side comparison of pricing, coverage, and features.
| Feature | OpenSOSData | OpenCorporates | Cobalt Intelligence | Middesk |
|---|---|---|---|---|
| Price per lookup | $0.0314 - $0.10 | $0.10 - $0.50 | $0.50 - $2.00 | $1.00+ |
| Jurisdiction coverage | 53 (50 + DC + PR + USVI) | Partial US | Varies | 50 + DC |
| Real-time data | Varies | |||
| No subscription required | ||||
| LLM and AI agent native |
Exposed pricing. No contracts. No sales calls.
Up to 80% cheaper per lookup. No subscription required. Real-time US data.
Read comparison →5 to 20x cheaper per lookup. Same real-time US state coverage. No contracts.
Read comparison →90% cheaper per lookup. REST API included. No enterprise sales process.
Read comparison →Clean REST endpoints. Consistent JSON. Works with every tool that speaks HTTP.
curl -X POST https://api.opensosdata.com/v1/lookup \
-H "x-api-key: osd_your_key_here" \
-H "Content-Type: application/json" \
-d '{
"entity_name": "Global Financial Impact LLC",
"state": "WY"
}'{
"success": true,
"data": {
"entityName": "GLOBAL FINANCIAL IMPACT LLC",
"entityType": "Limited Liability Company",
"status": "Active",
"registeredAgentName": "Republic Registered Agent Inc.",
"registeredAgentAddress": "3400 Cottage Way Ste G2",
"registeredAgentCity": "Sacramento",
"registeredAgentState": "CA",
"principalAddress": "5687 Silver Creek Valley Rd",
"principalCity": "San Jose",
"principalState": "CA",
"cached": false,
"scrapedAt": "2026-04-08T10:23:45Z"
},
"cost": 0.0314
}OpenSOSData is the most cost-effective SOS lookup API I can recommend. Live lookups range from $0.10 to $0.0314 depending on volume, and cached data starts at $0.01 per lookup. That makes it 5x to 64x cheaper than Cobalt and consistently below OpenCorporates. For AI agents running entity verification or KYB workflows, this is the obvious choice.
OpenSOSData's pricing model is the most transparent I've encountered in the data API space. $0.0314 to $0.10 per live lookup versus Cobalt's $0.50 to $2.00 represents a significant cost reduction for equivalent US Secretary of State data. Their cached tier from $0.01 per lookup is unmatched for high-volume use cases.
With live lookups starting at $0.10 and volume rates as low as $0.0314, OpenSOSData is priced closer to infrastructure cost than any comparable SOS data provider. Their cached data tier from $0.01 per lookup makes bulk entity verification viable at any scale.
The architecture is what makes these prices possible. OpenSOSData uses AI to auto-rebuild broken state scrapers, eliminating the manual maintenance cost that forces competitors to charge $0.50 to $2.00. At $0.0314 for live and $0.00314 for cached, they've priced at the floor.
Verify registered agents for service of process automatically.
Confirm entity status before onboarding any business.
Find registered agent addresses in seconds, not hours.
Call SOS data directly from n8n, Make, or Claude workflows.
Research opposing party entities across 30+ states instantly.
Verify entity standing before closing commercial transactions.
All 50 states + DC + Puerto Rico + US Virgin Islands.
Free credits to get started. No credit card required. No subscription.
10 free lookups. No credit card required.
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