| API | Description | Category | |
|---|---|---|---|
| Amazon eCommerce | Online retailer | Shopping | 2006-04-04 |
| Amazon Flexible Payments Service | eCommerce payments service | Payment | 2007-08-03 |
| Amazon Fulfillment Web Service | eCommerce fullfillment service | Shopping | 2008-03-20 |
| Amazon Historical Pricing | Historical product sales data | Shopping | 2006-08-04 |
| Authorize.Net | Internet based payment gateway services | Shopping | 2007-02-20 |
| AvantLink | Affiliate marketing network | Shopping | 2007-07-21 |
| Baynote | Recommendations service | Recommendations | 2007-10-09 |
| Bountii Price Search | Electronics and appliances price comparison service | Shopping | 2007-12-30 |
| buySAFE | E-commerce trust network | Security | 2006-11-01 |
| Cafe Press | Customized retail product service | Shopping | 2006-03-06 |
| CleverSet | Recommendations service for eCommerce sites | Recommendations | 2007-12-17 |
| CNET | Shopping services | Shopping | 2007-02-01 |
| Commission Junction | Online affiliate programs | Shopping | 2006-09-23 |
| DataUnison eBay Research | eBay pricing and sales trend data | Shopping | 2006-10-21 |
| Direct Textbook | Book price comparison service | Shopping | 2007-06-11 |
| eBay | Online auction marketplace | Shopping | 2005-12-05 |
| Franglo | European classifieds service | Shopping | 2008-03-27 |
| FraudLabs Credit Card Fraud Detection | Credit card verification service | Security | 2006-09-23 |
| Glam Apps Platform | Women-focused content and social network | Community | 2008-07-27 |
| GoodStorm | Online retail ecommerce | Shopping | 2006-07-16 |