Smarty

The Smarty Streets address verification integration checks every shipping address a customer enters at checkout against authoritative postal data in real time, so typos and undeliverable addresses are caught before an order ever reaches fulfillment. UltraCart verifies, standardizes, and can autocomplete the address inline, turning a common source of carrier correction fees and failed deliveries into a non-issue.

Smarty, formerly SmartyStreets, is a US-based address data company with more than 10 years in the business and a database of over 210 million verified US addresses. Its CASS-certified engine standardizes addresses against USPS data, validates addresses across more than 195 countries, and returns results in milliseconds. Smarty is trusted by organizations like Uber, Chase, and the American Red Cross.

Without address verification, a single mistyped street or missing apartment number flows straight from checkout to your label printer. The carrier then charges an address-correction fee, the package is delayed or returned, and your team loses time reshipping and answering "where is my order" tickets. UltraCart closes that gap by sending the entered address to Smarty during checkout and acting on the result: a deliverable address passes through, a correctable one is offered back as a standardized suggestion, and an address that cannot be confirmed is handled by a rule you set in advance.

The integration runs server-side, so UltraCart calls Smarty with your account credentials and no address-lookup key is ever exposed in the storefront. It is built directly into the checkout rather than bolted on as a separate app, and standard storefront themes ship with the suggestion and confirm prompts already in place, which makes setup a configuration task instead of a build. You stay in control with a fallback rule and monthly lookup caps that guard against unexpected cost, while optional autocomplete speeds address entry and helps lift checkout conversion.