| API | Description | Category | Date |
|---|---|---|---|
| TypePad AntiSpam | Anti-spam service for blogs | Security | 2012-09-20 |
| UBC ePayment | UBC's secure online payment service | Payment | 2012-05-22 |
| Universign | Electronic document signature service | Security | 2012-02-23 |
| Unshorten.It | URL unshortening service | Security | 2013-04-16 |
| USA ePay | Secure online payment service for businesses | Payment | 2012-09-17 |
| Veratad | Online identity and age verification service | Security | 2012-09-25 |
| Verify.IM Trust | Online identity verification service | Security | 2010-12-08 |
| Vidoop | Secure authentication service | Security | 2009-02-24 |
| VirusTotal | Malware scanning service | Tools | 2012-07-09 |
| Visual DataFlex ElfProef | Dutch bank account number validation service | Security | 2012-05-10 |
| VoiceVault | Voice biometric identity verification | Security | 2012-01-10 |
| VouchSafe | Non-CAPTCHA form validation service | Security | 2012-12-12 |
| VulnDB | Security issue knowledge management service | Security | 2013-05-22 |
| WebPurify Profanity Filter | Profanity filtering service | Utility | 2007-01-14 |
| WebSense ThreatSeeker Cloud | Security and threat assessment service | Security | 2012-11-29 |
| WebServiceMart Phone3T | Phone number validation service | Reference | 2012-07-25 |
| Websnapr | Screenshot preview service | Security | 2012-12-31 |
| Windows Live Data | Service for users to control data access | Security | 2007-05-01 |
| Windows Live ID Client SDK | Windows SDK for Windows Live sign-in authentication | Security | 2007-02-03 |
| Windows Live ID Web Authentication | Web based authentication service | Security | 2008-01-13 |





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