Qualified Address API

Overview
Summary	US address verification service
Category	Reference
Tags	reference mapping
Date Added	2008-07-02
Description	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.
API Home Page	http://www.qualifiedaddress.com/Services/Addr ...
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Protocol
Protocols
Data Formats	Javascript or XML
Functionality
API Groups
Example API Methods
Client Install Required	No
Security
Authentication Model
SSL Support
Read-only Without Login	No
Support
Vendor API Kits	C#, Java, PHP, HTML & Microsoft Access example code included
Community API Kits
API Blog
Site Blog
API Forum
Developer Support
Signup and Licensing
Signup Requirements	Trial or regular account required
Developer Key Required
Account with Service Required	Yes
Commercial Licensing
Non-Commercial Licensing
Data Licensing
Usage Fees	Free 14-day, 500-address trial period, $19.95 after trial for 250 API queries, tiered pricing after that
Usage Limits	Varies based on tier
Terms of Service