Business Name Availability API
Check business name availability in real time across 6 U.S. states. Built for business formation platforms, legal tech, and compliance automation tools.
6 States — Official State Business Registries
Checks run against each state's official Secretary of State business registry.
Active — 6 states
Quick Start
Request
curl --request GET \
--url 'https://business-name-availability.p.rapidapi.com/check?name=Acme+Ventures+LLC&state=DE' \
--header 'x-rapidapi-host: business-name-availability.p.rapidapi.com' \
--header 'x-rapidapi-key: YOUR_API_KEY'Response
{
"name": "Acme Ventures LLC",
"state": "DE",
"available": true,
"exact_match": false,
"similar_names": [
"Acme Ventures Inc",
"Acme Venture Capital LLC"
],
"checked_at": "2026-03-23T15:00:00Z",
"source_url": "https://icis.corp.delaware.gov/",
"cache_hit": false
}Response Schema
| Field | Type | Description |
|---|---|---|
| name | string | The business name that was checked |
| state | string | Two-letter state code |
| available | boolean | Whether the name is available for registration in this state |
| exact_match | boolean | Whether an exact match exists in the state registry |
| similar_names | array | List of similar or conflicting names found in the registry |
| checked_at | string | ISO 8601 timestamp of when the check was performed |
| source_url | string | URL of the official state registry used |
| cache_hit | boolean | Whether this result was served from cache or fetched live |
Common Use Cases
Simple, transparent pricing
Start for free. Scale as you grow. All plans include access to official data sources and real-time verification.
Pro
3,000 requests/month
- 3,000 checks/month
- 6 states
- Then $0.10/each
- Priority support
Ultra
10,000 requests/month
- 10,000 checks/month
- 6 states
- Then $0.008/each
- Priority support
Mega
50,000 requests/month
- 50,000 checks/month
- 6 states
- JSON responses
- Dedicated support
API Reference
| Method | Path | Description |
|---|---|---|
| GET | /check | Check name availability in a specific state |
| GET | /states | List supported states with registry metadata |
| GET | /status | API health status |
Frequently asked questions
What does available: true mean?
It means no exact match was found in the state's official business registry at the time of the check. Similar names may still exist — review the similar_names array before filing.
How fresh is the availability data?
Results are cached for up to 30 minutes. For pre-filing checks, pass bypass_cache=true to force a live lookup against the state registry.
Which states are you adding next?
We are actively expanding coverage. Contact us for priority state additions or to discuss a custom integration for your target states.
Do you offer enterprise contracts?
Yes. Contact us for custom volume, SLA guarantees, and white-label access.
Need custom volume or SLA guarantees?
Contact us for enterprise pricing, white-label access, dedicated support, and custom contracts tailored to your platform.
Contact Enterprise Sales