| API | Description | Category | Date |
|---|---|---|---|
| AdGooroo | Keyword search marketing platform | Advertising | 2010-01-11 |
| AuthorityLabs Partner | SEO Rank checking service | Internet | 2011-07-26 |
| BuiltWith | Website information service | Internet | 2011-01-25 |
| Daum Context Keyword | Contextual keyword extraction service | Tools | 2011-07-12 |
| Directory Maximizer Directory Submissions | SEO Link Building Service | Search | 2011-09-27 |
| Ginzametrics | SEO service | Internet | 2011-01-31 |
| HTTP Redirect Chain Enumerator | Search Engine Optimization tool | Utility | 2010-08-13 |
| Masspublisher | Website and widget publishing and marketing service | Internet | 2011-08-15 |
| MySEOTool | SEO management tools | Internet | 2013-04-18 |
| Positionly | Website analytics platform | Search | 2013-04-15 |
| PositionMonitor | Keyword and rank monitor | Tools | 2012-05-09 |
| PostLinks.com | Link building service | Internet | 2012-12-12 |
| Raven SEO Tools | Internet Marketing Tools | Internet | 2010-12-09 |
| Raven Tools | Search engine optimization services | Search | 2009-10-28 |
| Regator Semantic | Content aggregator and analysis service | Internet | 2012-07-23 |
| SEO metrics | SEO metrics gathering service | Internet | 2011-12-06 |
| SEOgadget Links | Inbound link analysis service | Internet | 2013-01-07 |
| SEOlytics | SEO analytics software | Advertising | 2012-10-05 |
| SEOmoz | Search engine optimization services | Search | 2009-07-21 |
| SEOshop WebshopApp | Search engine optimized webshop service | Retail | 2012-08-09 |
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