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Qualified Address API

From their site: Verify addresses on any website form. Great for validating shipping addresses before mailing a product or adding +4 Codes to addresses as they are entered onto your website. JavaScript or XML Versions available. Address verification against U.S. Postal Service� (USPS�) file, down to the Apt/Suite level. Accesses CASS-certified software.

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Qualified Address: Highlights

US address verification service
Data Formats
Javascript, XML
API home
http://smartystreets.com/products/liveaddress ... 

Qualified Address: Specifications


Client Install Required

Signup and Licensing

Signup Requirements
Trial or regular account required  
Developer Key Required
Account Required
Commercial Licensing
Non-Commercial Lic.
Data Licensing
Usage Fees
Free 14-day, 500-address trial period, $19.95 after trial for 250 API queries, tiered pricing after that  
Program Fees
Certification Program
Usage Limits
Varies based on tier 
Terms of Service


Authentication Model
SSL Support
Read-only Without Login


Vendor API Kits
C#, Java, PHP, HTML & Microsoft Access example code included 
Community API Kits
API Blog
Site Blog
API Forum
Developer Support
Console URL

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