| API | Description | Category | Date |
|---|---|---|---|
| RainCaptcha | Free CAPTCHA service | Security | 2012-12-03 |
| Oxilion Antispam | Dutch anti-spam service | 2012-11-15 | |
| Photo Captcha | Image based captcha service | Security | 2012-10-04 |
| TypePad AntiSpam | Anti-spam service for blogs | Security | 2012-09-20 |
| Keypic | Image-based spam prevention service | Security | 2012-08-17 |
| SpamWipe | Comment spam prevention service | Security | 2012-08-17 |
| Postmark Spamcheck | Email spam filtering service | 2012-06-25 | |
| Vemringde | Telephone spammer database | Telephony | 2012-03-01 |
| Impermium | Website protection service | Security | 2011-09-08 |
| SpamOn | Disposable email address service | 2011-08-30 | |
| BlogSpam.net | Detection for Blog & Forum SPAM | Security | 2011-05-31 |
| Disposable E-Mail Address | Trash mail service | 2011-05-31 | |
| DEA Filter | Spam and email filter | Security | 2011-05-20 |
| Guerrilla Mail | Temporary Email Service | 2011-05-05 | |
| youcantcall.us | Reject unwanted phone calls | Telephony | 2011-04-15 |
| ProtecMail | Antispam and Antivirus Solutions | Security | 2011-02-08 |
| Call me | Hide contact details on the internet | Security | 2010-12-17 |
| reCAPTCHA | Security and Book Digitalization Service | Security | 2010-11-29 |
| Stop Forum Spam | Database of online forum spammers | Internet | 2010-04-21 |
| TWASE | Twitter spam prevention service | Social | 2010-04-21 |
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