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.
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
Does the API check a business name's availability and existing registrations across states?
Yes. Each call checks a proposed business or company name against a state's official Secretary of State registry and returns whether the exact name is taken, plus any similar or conflicting existing registrations. Run the same check across all six supported states to confirm availability before filing in each one.
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