Texas SOS Business Search API | OpenSOSData

Texas SOS Business Search API: Direct Access to Texas Secretary of State Data

If you're building applications that need Texas business entity data, the Texas Secretary of State maintains the authoritative registry of all incorporated businesses, LLCs, partnerships, and other entities formed in Texas. OpenSOSData provides a REST API to query this data directly, with pricing at $0.0314 per lookup—far below industry competitors.

This guide covers how to integrate the Texas SOS business search API into your application, what data you'll receive, and how to optimize costs through caching.

Why Use a Texas SOS Business Search API?

Manual lookups on the Texas Secretary of State website work for one-off searches, but they don't scale. If you need to:

Verify business entity status during customer onboarding
Conduct bulk compliance checks
Build internal business intelligence tools
Integrate entity data into your SaaS platform
Monitor registered agent changes or dissolution notices

...you need an API that connects directly to the source. OpenSOSData eliminates manual data entry and gives you real-time, machine-readable access to Texas business registrations.

What Data Does the Texas SOS API Return?

Each lookup returns comprehensive entity information including:

Entity name and official registration number
Business type (corporation, LLC, partnership, etc.)
Current status (active, inactive, dissolved)
Formation date
Registered agent name and full address
Principal/mailing address
Officer names and titles

This is exactly what you'd find on the Texas Secretary of State website, but delivered via JSON in milliseconds instead of manual browsing.

Pricing: $0.0314 Per Lookup

OpenSOSData charges $0.0314 (Pi pricing) per lookup. To put this in perspective:

OpenCorporates: $0.10–$0.50 per lookup
Cobalt Intelligence: $0.50–$2.00 per lookup
Middesk: $1.00+ per lookup

No subscription required. Minimum wallet: $3.14 (100 lookups). You pay only for what you use.

Cost advantage through caching: The API maintains a 7-day Redis cache. Cache hits are completely free. If the same entity is queried within 7 days, you get instant results at zero cost. You can force a real-time scrape by passing ?fresh=true, but most repeated queries will hit the cache.

Quick Start: Your First Texas SOS Lookup

Getting started requires just a few steps:

Sign up for a free account at https://opensosdata.com (currently on waitlist)
Add a minimum of $3.14 to your wallet
Get your API key from your dashboard
Make your first request

Example: cURL Request to Search Texas Business Entity

curl -X POST https://api.opensosdata.com/v1/lookup \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -d '{
    "state": "TX",
    "entity_name": "Tesla Inc"
  }'

Response (simplified):

{
  "entity_name": "Tesla Inc",
  "entity_type": "Corporation",
  "entity_id": "0800088514",
  "status": "active",
  "formation_date": "1985-01-01",
  "registered_agent": {
    "name": "Registered Agent Name",
    "address": "123 Main Street, Austin, TX 78701"
  },
  "principal_address": "456 Electric Avenue, Palo Alto, CA 94301",
  "officers": [
    {
      "name": "Officer Name",
      "title": "President"
    }
  ],
  "cached": false,
  "lookup_cost": "$0.0314"
}

Supported States and Coverage

The API currently has active integrations with 11 states. Texas (TX) is fully supported, along with:

Delaware (DE)
Arkansas (AR)
Colorado (CO)
Georgia (GA)
Minnesota (MN)
North Dakota (ND)
Idaho (ID)
Alabama (AL)
North Carolina (NC)
Florida (FL)

Caching and Cost Optimization

By default, the API caches all lookups in Redis for 7 days. If you query the same Texas entity twice within a week, the second lookup is free. This creates significant savings for applications with repeated entity checks.

Example scenario: A compliance team runs daily checks on 50 partner entities. After the first day (~$1.57), subsequent daily runs hit the cache and cost nothing. Only new entities or refreshed data (via ?fresh=true) incurs charges.

For applications that must have real-time data regardless of cache status, append ?fresh=true to force a live scrape from the Texas Secretary of State website. This bypasses cache but still costs only $0.0314.

Integration Considerations

REST vs. Batch: The API accepts POST requests for single or bulk lookups. If you're doing 1,000 entity verifications, you can batch them in a single request rather than making 1,000 individual calls, reducing API overhead.

Error Handling: Not all entity names will match perfectly. Implement fuzzy matching on your end or use the entity ID if you have it. The Texas Secretary of State database is authoritative, so null results mean the entity doesn't exist in Texas.

Rate Limits: No hard rate limits documented, but use reasonable backoff strategies for bulk operations.

When to Use the Texas SOS API vs. Manual Lookup

Use the API if you:

Check business status more than once per month
Build products requiring entity verification
Perform compliance or due diligence at scale
Need programmatic access to registration data

Manual lookup is fine if you:

Do occasional, one-off searches
Don't need automation
Have no budget for API costs

For most business applications, the API pays for itself in time savings and reduced friction.

Getting Started Today

The Texas SOS business search API is ready to integrate. Visit https://opensosdata.com to sign up, review the full OpenAPI documentation at https://opensosdata.com/openapi.yaml, and start building.

With $0.0314 per lookup, no subscriptions, and free cache hits, it's the most cost-effective way to access Texas Secretary of State business data programmatically.

Query Texas Secretary of State Business Data via REST API