Florida SOS API Entity Search: Verify Business Entities in Real Time

Whether you are onboarding a new vendor, underwriting a commercial loan, or conducting due diligence on a potential partner, knowing that a Florida business is legitimately registered—and currently active—is not optional. It is a compliance baseline. For United States professionals operating under Bank Secrecy Act (BSA) obligations, internal KYB programs, or state-level licensing requirements, manual lookups on the Florida Division of Corporations website simply do not scale. A Florida SOS API entity search solves that problem by delivering real-time, structured data directly into your workflows.

This guide explains the regulatory landscape driving demand for automated business verification, walks through exactly how the OpenSOSData API works for Florida entities, and gives you production-ready code you can run today.

Why Florida Business Verification Matters More Than Ever

Florida is home to more than 3.5 million registered business entities—one of the largest pools in the country. That scale creates opportunity and risk in equal measure. Shell companies, dissolved entities, and name-similar fraudsters are real threats that compliance teams encounter weekly.

The Regulatory Stack Demanding Entity Verification

Bank Secrecy Act (BSA) and FinCEN guidance require covered financial institutions to maintain a Customer Due Diligence (CDD) program that includes verifying the legal existence of business customers. While FinCEN's Beneficial Ownership Information (BOI) reporting rule under the Corporate Transparency Act has been removed for domestic US companies via subsequent regulatory action, leaving BOI obligations only for foreign reporting companies—the underlying CDD obligation to verify that a business exists and is in good standing remains firmly in place.

KYB (Know Your Business) programs across fintech, banking, insurance, and commercial real estate require a verifiable legal name, entity status, formation date, and registered agent as minimum data points before account opening or contract execution. Stale or manually entered data exposes firms to regulatory criticism during examinations.

OFAC sanctions screening workflows also benefit: you cannot screen an entity you have not properly identified. Retrieving the canonical legal name and state entity ID from an authoritative Secretary of State source ensures your screening engine receives clean input.

What the Florida Secretary of State Returns—and What APIs Add

The Florida Division of Corporations (Sunbiz.org) is the official source for entity records. It publishes the entity name, document number, FEI/EIN if voluntarily filed, status, filing date, registered agent name, registered office address, and officer/director information. Accessing this data manually is free but slow. Accessing it programmatically through a commercial API like OpenSOSData means you get structured JSON responses, webhook-ready architecture, and volume pricing that makes per-entity verification economically viable at scale.

Introducing the OpenSOSData Florida SOS API

OpenSOSData provides a single REST endpoint that covers all 50 US states plus Washington D.C., Puerto Rico, and the U.S. Virgin Islands—more than 34 million entities in total. Florida is fully supported with both live lookups and cached lookups.

Key Data Points Returned for Every Florida Entity

• Legal entity name
• Entity type (LLC, Corporation, LP, etc.)
• State entity ID / document number
• Current status (Active, Inactive, Dissolved, etc.)
• Formation / filing date
• Registered agent name and address

Pricing at a Glance

Pricing is pay-as-you-go with no monthly minimums, making it accessible for startups running a few hundred verifications per month and enterprises processing millions. Full pricing details are available at the documentation portal.

API Endpoint and Authentication

All lookups use a single POST endpoint:

POST https://api.opensosdata.com/v1/lookup

Authentication is handled via the x-api-key HTTP header. There is no Bearer token scheme. Sign up and retrieve your API key at app.opensosdata.com.

Key Request Parameters

• entity_name — The business name to search (required)
• state — Two-letter state code, e.g., FL for Florida (required)
• cache_preference — Controls data freshness: live_only, cache_first, or cache_only

Practical Code Examples

cURL: Live Florida Entity Lookup

# Live lookup for a Florida business entity
# Replace YOUR_API_KEY with the key from app.opensosdata.com
curl -X POST https://api.opensosdata.com/v1/lookup \
  -H "Content-Type: application/json" \
  -H "x-api-key: YOUR_API_KEY" \
  -d '{
    "entity_name": "Sunshine Logistics LLC",
    "state": "FL",
    "cache_preference": "live_only"
  }'

Setting cache_preference to live_only tells the API to fetch directly from the Florida Division of Corporations source, ensuring you receive the most current status information—critical for active KYB decisions.

Python: Batch Florida Entity Verification

import requests

# Configuration
API_KEY = "YOUR_API_KEY"          # From app.opensosdata.com
API_URL = "https://api.opensosdata.com/v1/lookup"
HEADERS = {
    "Content-Type": "application/json",
    "x-api-key": API_KEY           # Always use x-api-key header
}

# List of Florida entities to verify
entities_to_check = [
    "Sunshine Logistics LLC",
    "Gulf Coast Ventures Inc",
    "Palmetto Realty Group LLC"
]

def verify_florida_entity(entity_name: str) -> dict:
    """
    Verify a Florida business entity via OpenSOSData API.
    Returns structured entity data or an error message.
    """
    payload = {
        "entity_name": entity_name,  # Business name to search
        "state": "FL",
        "cache_preference": "cache_first"  # Use cache when available to reduce cost
    }

    response = requests.post(API_URL, json=payload, headers=HEADERS)
    response.raise_for_status()
    return response.json()

# Run batch verification
for name in entities_to_check:
    result = verify_florida_entity(name)

    # Extract key compliance fields
    status = result.get("status", "UNKNOWN")
    entity_id = result.get("entity_id", "N/A")
    formation_date = result.get("formation_date", "N/A")
    registered_agent = result.get("registered_agent", {})

    print(f"Entity: {name}")
    print(f"  Status:          {status}")
    print(f"  State Entity ID: {entity_id}")
    print(f"  Formation Date:  {formation_date}")
    print(f"  Reg. Agent:      {registered_agent.get('name', 'N/A')}")
    print(f"  Reg. Address:    {registered_agent.get('address', 'N/A')}")
    print("-" * 50)

The cache_first preference in batch workflows is a sensible cost-control strategy: for initial screening of large vendor lists, cached data is usually recent enough, and you can follow up with live_only calls on candidates that advance to the next due diligence stage.

Choosing the Right Cache Preference for Your Workflow

Building a Florida KYB Verification Flow

A production KYB pipeline for Florida entities typically follows this sequence:

1. Collect applicant-provided business name and state. Do not assume the name is correct—typos and trade name variations are common.
2. Call OpenSOSData with live_only to retrieve the canonical legal name and entity ID from the Florida Division of Corporations.
3. Verify entity status is Active. Dissolved, revoked, or inactive entities should trigger an adverse action workflow.
4. Cross-reference the registered agent address against the applicant-provided address. Significant mismatches warrant additional review.
5. Feed the canonical legal name into your OFAC screening engine to ensure you are screening the correct legal identity, not a trade name or alias.
6. Log the API response with timestamp in your compliance record. Regulators expect evidence that verification occurred at a specific point in time.

This six-step flow can be fully automated. With OpenSOSData at $0.10 per live lookup—or as low as $0.0314 at volume—the per-application verification cost is negligible compared to the regulatory risk of onboarding an unverified entity.

Florida-Specific Compliance Considerations

Florida requires most business entities to file an Annual Report by May 1 each year. Entities that miss the deadline face a late fee and eventual administrative dissolution after September 30. This means an entity that appeared active in January could be administratively dissolved by October of the same year. For compliance programs monitoring ongoing relationships—not just onboarding—periodic re-verification using the OpenSOSData API is a sound operational practice. Set a scheduled job to re-verify high-value counterparties quarterly using live_only lookups.

Florida also uses distinct entity types including Florida Limited Liability Companies, Florida Profit Corporations, Florida Non-Profit Corporations, and various foreign entity registrations. The entity type returned by the API is essential for determining which state statutes govern the entity's governance obligations—relevant when reviewing operating agreements or articles of incorporation during enhanced due diligence.

Getting Started with OpenSOSData

Setup takes under five minutes. Navigate to app.opensosdata.com, create an account, and your API key is available immediately. No contract, no minimum commitment. Full endpoint documentation, response schema definitions, and error code references are published at opensosdata.com/docs/.

For enterprise integrations requiring SLAs, dedicated infrastructure, or volume commitments, the OpenSOSData website provides contact options for custom arrangements.

Frequently Asked Questions