🌐 Domain Checker API

Easy-to-use API for checking domain DNS records. Perfect for AI tools and automation.

📖 Quick Start

Use this API to check SPF, DKIM, DMARC, MX, and nameserver records for any domain.

Endpoint:
https://nhmohio.com/domain-checkup.html?domain=example.com&format=json

Alternative API endpoint:
https://nhmohio.com/api/domain-check.js?domain=example.com

🔧 Parameters

Parameter	Required	Description	Example
`domain`	Yes	The domain name to check	example.com
`format`	No	Response format. Use "json" for JSON output	json

📤 Response Format

The API returns a JSON object with the following structure:

{
  "success": true,
  "domain": "example.com",
  "timestamp": "2025-01-08T12:00:00.000Z",
  "summary": {
    "overall_status": "ok",
    "issues_count": 0,
    "issues": [],
    "all_checks_passed": true
  },
  "records": {
    "nameservers": {
      "status": "found",
      "nameservers": [...],
      "provider": {...}
    },
    "spf": {
      "status": "ok",
      "record": "v=spf1 include:_spf.google.com ~all",
      "issues": []
    },
    "dmarc": {
      "status": "ok",
      "record": "v=DMARC1; p=quarantine; rua=mailto:[email protected]",
      "issues": []
    },
    "dkim": {
      "status": "ok",
      "record": "...",
      "foundSelector": "google",
      "issues": [],
      "selectors": {...}
    },
    "mx": {
      "status": "ok",
      "records": [
        {"priority": 10, "exchange": "mx1.example.com"}
      ],
      "isMicrosoft365": false,
      "isGoogleWorkspace": true,
      "issues": []
    }
  }
}

📊 Status Values

Each record check returns a status value:

ok - Record found and properly configured
found - Record found but may have issues
missing - Record not found
error - Error occurred while checking
configured - Record configured via CNAME (DKIM)

💡 Usage Examples

JavaScript/Fetch

async function checkDomain(domain) {
  const response = await fetch(`https://nhmohio.com/domain-checkup.html?domain=${domain}&format=json`);
  const data = await response.json();
  return data;
}

// Usage
const result = await checkDomain('google.com');
console.log(result);
            

Python/Requests

import requests
import json

def check_domain(domain):
    url = f"https://nhmohio.com/domain-checkup.html"
    params = {"domain": domain, "format": "json"}
    response = requests.get(url, params=params)
    return response.json()

# Usage
result = check_domain('google.com')
print(json.dumps(result, indent=2))
            

cURL

curl "https://nhmohio.com/domain-checkup.html?domain=google.com&format=json"

💡 Note for AI Tools: This API is designed to be easily accessible by AI assistants. Simply append ?domain=DOMAIN_NAME&format=json to the URL to get structured JSON data. No authentication required. The API uses DNS-over-HTTPS (DoH) for privacy and reliability.

🧪 Test the API

Domain: