| API | Description | Category | Date |
|---|---|---|---|
| MySEOTool | SEO management tools | Internet | 2013-04-18 |
| Positionly | Website analytics platform | Search | 2013-04-15 |
| Sick Marketing | Link-building and search optimization service | Search | 2013-02-27 |
| Yandex Webmaster | Yandex-specific search engine optimization tools | Internet | 2013-02-25 |
| SEOgadget Links | Inbound link analysis service | Internet | 2013-01-07 |
| PostLinks.com | Link building service | Internet | 2012-12-12 |
| SEMrush | Software products for search and marketing industries | Internet | 2012-12-10 |
| Sistrix | Website optimization service | Internet | 2012-11-28 |
| SERPs SEO & Rankings | SEO ranking dashboard | Internet | 2012-11-28 |
| SEOlytics | SEO analytics software | Advertising | 2012-10-05 |
| LinkTiger | Link Checking Service | Utility | 2012-10-04 |
| SEOshop WebshopApp | Search engine optimized webshop service | Retail | 2012-08-09 |
| Twingly | Blog Search Service | Blogging | 2012-07-26 |
| Regator Semantic | Content aggregator and analysis service | Internet | 2012-07-23 |
| eCoComa Marketing | Online marketing service | Advertising | 2012-05-15 |
| PositionMonitor | Keyword and rank monitor | Tools | 2012-05-09 |
| Qirina | Keyword analysis database | Database | 2012-05-03 |
| Analytics SEO | SEO optimization service | Search | 2012-03-07 |
| Link Emperor | SEO campaign management service | Internet | 2012-01-31 |
| SEO Engine | SEO improvement and implementation service | Internet | 2012-01-30 |
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