Article Description: This tutorial provides a hands-on guide for web and mobile developers—and tech-savvy marketers—looking to integrate the CDXGeoData API to validate and standardize U.S. postal addresses. We walk through a sample use case, explore the GeoVerify service, and show how to embed it into real-time customer data entry forms. Key outcomes include corrected addresses, USPS-compliant formatting, and ZIP+4 enrichment.

Introduction: Why Address Validation Matters

For developers working on customer-facing web forms or mobile apps, address validation isn’t just a nice-to-have—it’s mission-critical...

Meet the GeoVerify Endpoint

CDXGeoData’s GeoVerify service is designed specifically for validating and correcting structured U.S. addresses...

API Request Format

The base URL for GeoVerify is:

• key – Your CDXGeoData API key
• address – Street address (e.g., "1600 Pennsylvania Ave")
• citystatezip – Combined city, state, ZIP (e.g., "Washington DC 20500")
• format – json, xml, or csv (default: json)

Sample JSON Response

{
  "service": "GeoVerify",
  "status": "Success",
  "results": [
    {
      "fullAddressOut": "1600 PENNSYLVANIA AVE NW, WASHINGTON, DC 20500-0003",
      ...
    }
  ]
}
    

JavaScript Integration Example

function validateAddress(street, cityStateZip) {
  const params = new URLSearchParams({
    key: 'YOUR_CDXGEODATA_KEY',
    address: street,
    citystatezip: cityStateZip,
    format: 'json'
  });

  fetch(`https://geodata.cdxtech.com/api/geoverify?${params.toString()}`)
    .then(response => response.json())
    .then(data => {
      if (data.status === "Success") {
        const result = data.results[0];
        console.log("Corrected Address:", result.fullAddressOut);
      }
    });
}
    

How to Use It in a Form Workflow

1. User fills in address
2. On “blur” or form submit, call validateAddress()
3. If corrected address is returned, populate a confirmation modal
4. User confirms or edits, then final form is submitted

Example Use Case: E-commerce Checkout

In an e-commerce context, validating shipping addresses: reduces failed deliveries, eliminates the need for costly re-shipping, and qualifies your data for USPS discounts.

Additional Features: GeoVerifySingle

If you store full addresses in a single string... the GeoVerifySingle endpoint is available.

Cost and API Usage

• Each GeoVerify call costs 2 tokens
• Free tier includes 1,000 tokens/month

Final Thoughts: Benefits to Developers and Marketers

By integrating CDXGeoData into your app... developers reduce backend errors, marketers gain high-quality data, operations teams get cleaner CRM data.

Ready to Get Started?

• CDXGeoData API Documentation
• Developer API Key Signup
• CDX Technologies Blog