Quick Start
Get up and running with the Filed API in under 5 minutes. Create an account, get your API key, and make your first request.
1. Create an Account
Sign up for a free account at filed.dev/register. The free tier includes 100 API lookups per month — no credit card required.
2. Get Your API Key
After signing up, visit your account page to find your API key. Keys are prefixed with fd_live_ for production or fd_test_ for testing.
3. Make Your First Request
Search for a business entity by name and state:
curl "https://filed.dev/api/v1/search?name=Acme&state=FL" \
-H "Authorization: Bearer YOUR_API_KEY"import requests
resp = requests.get(
"https://filed.dev/api/v1/search",
params={"name": "Acme", "state": "FL"},
headers={"Authorization": "Bearer YOUR_API_KEY"}
)
data = resp.json()
print(data)const res = await fetch(
"https://filed.dev/api/v1/search?name=Acme&state=FL",
{ headers: { Authorization: "Bearer YOUR_API_KEY" } }
);
const data = await res.json();
console.log(data);req, _ := http.NewRequest("GET",
"https://filed.dev/api/v1/search?name=Acme&state=FL", nil)
req.Header.Set("Authorization", "Bearer YOUR_API_KEY")
resp, _ := http.DefaultClient.Do(req)
defer resp.Body.Close()
var result map[string]interface{}
json.NewDecoder(resp.Body).Decode(&result)4. Explore the Response
The API returns structured JSON with entity details:
{
"data": [
{
"id": "ent_mNqR7xKp",
"name": "ACME HOLDINGS LLC",
"state": "FL",
"type": "LLC",
"status": "Active",
"formedDate": "2019-03-14",
"registeredAgent": {
"name": "CSC Global",
"address": "1234 Main St, Tallahassee, FL 32301"
},
"principalAddress": "123 Main St, Miami, FL 33101",
"officerCount": 3,
"lastUpdated": "2026-02-27T12:00:00Z"
}
],
"meta": {
"total": 1,
"limit": 10,
"offset": 0,
"state": "FL",
"source": "Florida Division of Corporations"
}
}Next Steps
- Read the Authentication guide to learn about API key management.
- Explore the API Reference for all available endpoints.
- Try queries in the Playground without writing code.
- Check Coverage by State to see what data is available.
Introduction
Filed is a unified API for US business entity data. Query LLCs, corporations, and partnerships across all 50 states with a single API call.
Authentication
Learn how to authenticate with the Filed API using Bearer tokens. Manage API keys, understand key prefixes, and handle authentication errors.