BizFile API

Business Entity Lookup API

The BizFile API provides programmatic access to US business entity filings aggregated from Secretary of State offices. Search, verify, and retrieve business registration data through a single, normalized REST API.

This API is currently in beta. Coverage is expanding to additional states on an ongoing basis.

Authentication

All API requests require an API key sent in the Authorization header using the Bearer scheme.

curl https://api.bizfileapi.com/api/v1/search?state=FL&name=acme \
  -H "Authorization: Bearer bfa_live_sk_abc123..."

const res = await fetch(
  "https://api.bizfileapi.com/api/v1/search?state=FL&name=acme",
  {
    headers: {
      Authorization: "Bearer bfa_live_sk_abc123..."
    }
  }
);
const data = await res.json();

import requests

resp = requests.get(
    "https://api.bizfileapi.com/api/v1/search",
    params={"state": "FL", "name": "acme"},
    headers={"Authorization": "Bearer bfa_live_sk_abc123..."}
)
data = resp.json()

Keep your API key secret. Do not expose it in client-side code or public repositories.

Base URL

All endpoints are relative to the following base URL:

https://api.bizfileapi.com/api/v1

Rate Limits

Rate limits vary by plan. When you exceed a limit, the API returns 429 Too Many Requests.

Plan	Requests / min	Requests / day
Free	10	100
Starter	60	1,000
Growth	120	10,000
Scale	300	50,000

Rate Limit Headers

Every response includes the following headers:

Header	Description
`X-RateLimit-Limit`	Maximum requests allowed in the current window
`X-RateLimit-Remaining`	Requests remaining in the current window
`X-RateLimit-Reset`	Unix timestamp when the window resets

Search Entities

GET /v1/search

Search for business entities by state and name. Returns paginated results.

Parameters

statestring required

Two-letter US state code (e.g. FL, WA).

namestring required

Business name or partial name to search for.

statusstring optional

Filter by status: active, inactive, or dissolved.

typestring optional

Filter by entity type: llc, corporation, lp, nonprofit, gp, trust.

pageinteger optional

Page number for pagination. Default: 1.

per_pageinteger optional

Results per page (max 100). Default: 25.

Example Request

curl "https://api.bizfileapi.com/api/v1/search?state=FL&name=acme&status=active" \
  -H "Authorization: Bearer bfa_live_sk_abc123..."

const params = new URLSearchParams({
  state: "FL",
  name: "acme",
  status: "active"
});

const res = await fetch(
  `https://api.bizfileapi.com/api/v1/search?${params}`,
  {
    headers: {
      Authorization: "Bearer bfa_live_sk_abc123..."
    }
  }
);
const data = await res.json();

import requests

resp = requests.get(
    "https://api.bizfileapi.com/api/v1/search",
    params={
        "state": "FL",
        "name": "acme",
        "status": "active"
    },
    headers={"Authorization": "Bearer bfa_live_sk_abc123..."}
)
data = resp.json()

Example Response

{
  "data": [
    {
      "id": "fl_L21000483271",
      "name": "ACME SOLUTIONS LLC",
      "state": "FL",
      "type": "llc",
      "status": "active",
      "filing_date": "2021-03-15",
      "document_number": "L21000483271",
      "principal_address": {
        "street": "100 SE 2nd St, Suite 2000",
        "city": "Miami",
        "state": "FL",
        "zip": "33131"
      }
    },
    {
      "id": "fl_L19000227845",
      "name": "ACME DEVELOPMENT GROUP LLC",
      "state": "FL",
      "type": "llc",
      "status": "active",
      "filing_date": "2019-08-22",
      "document_number": "L19000227845",
      "principal_address": {
        "street": "401 E Las Olas Blvd, Suite 1400",
        "city": "Fort Lauderdale",
        "state": "FL",
        "zip": "33301"
      }
    }
  ],
  "pagination": {
    "page": 1,
    "per_page": 25,
    "total": 2,
    "total_pages": 1
  }
}

Entity Detail

GET /v1/entity/:id

Retrieve full details for a single entity, including registered agent and officer information.

Parameters

idstring required

The entity ID returned from a search result (e.g. fl_L21000483271).

Example Request

curl "https://api.bizfileapi.com/api/v1/entity/fl_L21000483271" \
  -H "Authorization: Bearer bfa_live_sk_abc123..."

const res = await fetch(
  "https://api.bizfileapi.com/api/v1/entity/fl_L21000483271",
  {
    headers: {
      Authorization: "Bearer bfa_live_sk_abc123..."
    }
  }
);
const data = await res.json();

import requests

resp = requests.get(
    "https://api.bizfileapi.com/api/v1/entity/fl_L21000483271",
    headers={"Authorization": "Bearer bfa_live_sk_abc123..."}
)
data = resp.json()

Example Response

{
  "data": {
    "id": "fl_L21000483271",
    "name": "ACME SOLUTIONS LLC",
    "state": "FL",
    "type": "llc",
    "status": "active",
    "filing_date": "2021-03-15",
    "document_number": "L21000483271",
    "last_annual_report": "2025-04-10",
    "principal_address": {
      "street": "100 SE 2nd St, Suite 2000",
      "city": "Miami",
      "state": "FL",
      "zip": "33131"
    },
    "mailing_address": {
      "street": "100 SE 2nd St, Suite 2000",
      "city": "Miami",
      "state": "FL",
      "zip": "33131"
    },
    "registered_agent": {
      "name": "REGISTERED AGENTS INC.",
      "address": {
        "street": "1200 Brickell Ave, Suite 1950",
        "city": "Miami",
        "state": "FL",
        "zip": "33131"
      }
    },
    "officers": [
      {
        "name": "Jane Smith",
        "title": "Managing Member",
        "address": {
          "street": "100 SE 2nd St, Suite 2000",
          "city": "Miami",
          "state": "FL",
          "zip": "33131"
        }
      },
      {
        "name": "John Doe",
        "title": "Authorized Member",
        "address": {
          "street": "100 SE 2nd St, Suite 2000",
          "city": "Miami",
          "state": "FL",
          "zip": "33131"
        }
      }
    ]
  }
}

Bulk Search

POST /v1/bulk

Submit up to 100 search queries in a single request. Each query runs independently and returns its own result set.

Request Body

queriesarray required

Array of search objects. Each must include state and name. Max 100 queries per request.

Example Request

curl -X POST "https://api.bizfileapi.com/api/v1/bulk" \
  -H "Authorization: Bearer bfa_live_sk_abc123..." \
  -H "Content-Type: application/json" \
  -d '{
    "queries": [
      { "state": "FL", "name": "acme" },
      { "state": "WA", "name": "cascade ventures" }
    ]
  }'

const res = await fetch(
  "https://api.bizfileapi.com/api/v1/bulk",
  {
    method: "POST",
    headers: {
      Authorization: "Bearer bfa_live_sk_abc123...",
      "Content-Type": "application/json"
    },
    body: JSON.stringify({
      queries: [
        { state: "FL", name: "acme" },
        { state: "WA", name: "cascade ventures" }
      ]
    })
  }
);
const data = await res.json();

import requests

resp = requests.post(
    "https://api.bizfileapi.com/api/v1/bulk",
    headers={
        "Authorization": "Bearer bfa_live_sk_abc123...",
        "Content-Type": "application/json"
    },
    json={
        "queries": [
            {"state": "FL", "name": "acme"},
            {"state": "WA", "name": "cascade ventures"}
        ]
    }
)
data = resp.json()

Example Response

{
  "results": [
    {
      "query": { "state": "FL", "name": "acme" },
      "data": [ ... ],
      "total": 47
    },
    {
      "query": { "state": "WA", "name": "cascade ventures" },
      "data": [ ... ],
      "total": 12
    }
  ]
}

Data Coverage

The following states are currently indexed. Coverage is expanding regularly.

State	Entities Indexed	Last Updated
Florida (FL)	2,500,000+	Daily
Colorado (CO)	900,000+	Daily
Washington (WA)	800,000+	Daily
Wyoming (WY)	200,000+	Daily

Entity Types

The type field on entity records will be one of the following values:

Value	Description
`llc`	Limited Liability Company
`corporation`	Corporation (C-Corp or S-Corp)
`lp`	Limited Partnership
`nonprofit`	Nonprofit Corporation
`gp`	General Partnership
`trust`	Business Trust

Entity Statuses

The status field indicates the current standing of the entity with the state.

Value	Description
`active`	Entity is in good standing and currently registered
`inactive`	Entity exists but is not in good standing (e.g. missed annual report)
`dissolved`	Entity has been dissolved, revoked, or voluntarily withdrawn

Error Codes

The API uses standard HTTP status codes. Error responses include a JSON body with a message field.

{
  "error": {
    "code": 401,
    "message": "Invalid or missing API key."
  }
}

Code	Meaning	Common Cause
400	Bad Request	Missing required parameter or invalid value
401	Unauthorized	Missing or invalid API key
403	Forbidden	API key does not have access to the requested resource
404	Not Found	Entity ID does not exist
429	Too Many Requests	Rate limit exceeded — check `X-RateLimit-Reset` header
500	Internal Server Error	Something went wrong on our end — retry or contact support

Pricing

Choose a plan that fits your usage. All plans include access to every endpoint and state.

Free

$0/mo

100 requests / month
No overage
Community support

Starter

$49/mo

1,000 requests / month
$0.05 per extra request
Email support

Growth

$199/mo

10,000 requests / month
$0.03 per extra request
Priority support

Scale

$499/mo

50,000 requests / month
$0.015 per extra request
Priority support

Need higher volume? Contact us for a custom Enterprise plan with dedicated infrastructure and SLA guarantees.