NH Secretary of State API: Business Lookup Guide

Why You Need an NH Secretary of State API

New Hampshire business registration data is critical for due diligence, compliance, and integration workflows. The traditional approach—visiting the NH Secretary of State website manually—doesn't scale. You need programmatic access.

OpenSOSData provides a REST API that queries the NH Secretary of State database directly, returning structured entity data in milliseconds. No web scraping. No stale cached data. Real-time results.

What You Get with OpenSOSData

When you call the NH Secretary of State API, you receive:

Entity name and business type (LLC, Corporation, LP, etc.)
Secretary of State entity ID
Current status (Active, Dissolved, etc.)
Formation date
Registered agent name and address
Principal business address
Officers and management structure

This data comes back as clean JSON, ready for integration into your application, compliance system, or workflow automation.

Pricing That Makes Sense

OpenSOSData charges $0.0314 per lookup—that's Pi pricing. No monthly subscriptions. No seat licenses. No hidden fees.

To put this in perspective:

OpenCorporates: $0.10–$0.50 per lookup
Cobalt Intelligence: $0.50–$2.00 per lookup
Middesk: $1.00+ per lookup

You start with a minimum wallet of $0.0314 per lookup. Pay for what you use. If you only need 10 lookups this month, you're not paying for infrastructure you don't need.

How the API Works

The NH Secretary of State API is a simple POST endpoint. Send an entity name or ID, get back structured data.

OpenSOSData uses a 7-day Redis cache to speed up repeated queries. If you ask for the same entity twice within 7 days, the second request returns instantly from cache. Need fresh data? Add ?fresh=true to force a real-time scrape from the Secretary of State.

Quick Start

Here's how to make your first API call to query a New Hampshire business:

curl -X POST https://api.opensosdata.com/v1/lookup \
  -H "x-api-key: YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "state": "NH",
    "query": "Granite State Manufacturing LLC"
  }'

Response:

{
  "entity_name": "Granite State Manufacturing LLC",
  "entity_type": "LLC",
  "sos_id": "123456789",
  "status": "Active",
  "formation_date": "2018-03-15",
  "registered_agent": {
    "name": "John Smith",
    "address": "100 Main St, Manchester, NH 03101"
  },
  "principal_address": "100 Main St, Manchester, NH 03101",
  "officers": [
    {
      "name": "Jane Doe",
      "title": "Manager"
    }
  ]
}

That's it. One request, structured data back. No parsing HTML tables. No managing browser automation tools.

When You Need This

Compliance teams use the NH Secretary of State API to verify business registration status before entering contracts.

Lenders and underwriters pull entity data during application reviews, checking formation dates and officer information.

Integration engineers embed the API into CRM systems, lending platforms, and onboarding workflows to automate business verification.

Legal teams validate registered agent information and track status changes across portfolios of entities.

Coverage and Reliability

OpenSOSData covers 50+ jurisdictions including all 50 US states, US territories (PR, VI, AS), and Washington DC. NH is fully supported with real-time data access.

The API handles high-volume queries without rate limiting. You're billed per lookup, not per request rate.

Integration Examples

The API endpoint is standard REST:

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

Integrate it into your stack with any HTTP client—JavaScript, Python, Go, Java, Ruby, whatever you use. Complete OpenAPI documentation is available at:

https://opensosdata.com/openapi.yaml

Getting Started

No subscriptions. No commitments. Use it or don't—you only pay for lookups you make.

Why Not Web Scraping?

Some developers consider scraping the NH Secretary of State website directly. Don't.

Web scraping is fragile—design changes break your parser. It's resource-intensive and slow. It violates terms of service. And it doesn't scale when you need thousands of lookups.

The NH Secretary of State API is the professional approach: reliable, fast, legal, and cost-effective.

Query New Hampshire Business Entities in Real-Time with OpenSOSData