USPS Address Verification Service API
Using a USPS address verification service API is a great way to standardize an address and provide more accurate address information. The United States Postal Service is the only service provider that actually does this free of charge. The USPS address database contains over 160 million US postal addresses. The database can yield additional data such as the ZIP code, area code, and latitude and longitude. The data is also used to sort mail by carrier case sequence. The USPS also provides a web interface to validate addresses one at a time. There are limitations. The XML format used to deliver address data is outdated. This limits the ability to implement innovative solutions. The USPS is also known for having inconsistent uptime. If your USPS account is terminated for any reason, you will not have access to the address verification service API. The API also has very restrictive terms of service. The USPS also has a comprehensive collection of public address validation APIs. These are