| API | Description | Category | Date |
|---|---|---|---|
| Sri Lanka Postal Codes | Postal code service | Shipping | 2013-02-21 |
| USPS Merchant Returns | U.S. Postal Service return shipping service | Shipping | 2012-12-20 |
| Stamps.com | Shipping label creation service | Shipping | 2012-11-19 |
| L-Vin Post | German letter mailing service | Other | 2012-11-15 |
| Swiss Post Barcode | Swiss shipping document service | Shipping | 2012-08-28 |
| Canada Post | Canadian postage and mailing service | Shipping | 2012-08-13 |
| Australia Post | Australian postal service | Shipping | 2012-07-03 |
| MapIt UK | U.K. postcode and location mapping service | Mapping | 2012-05-21 |
| Online Courier Quotes | Australian shipping, parcel delivery, and postage service | Shipping | 2012-05-16 |
| New Zealand Post Tracking | New Zealand parcel tracking service | Utility | 2012-01-16 |
| ZIPFOURce | U.S. address validation and standarization service | Mapping | 2011-11-30 |
| SendWrite | Paper card sending service | Social | 2011-11-15 |
| Postcard on the Run | Photo to postcard service | Photos | 2011-09-08 |
| PC2Paper Letter Pricing | Digital mail service | Other | 2011-08-30 |
| ThankThank Notes | Hand-written thank you note service | Other | 2011-08-29 |
| BlueMailCentral Postal | Digital mail service | Utility | 2011-03-21 |
| Deduktiv ebaas distance | UK postcodes service | Reference | 2011-02-28 |
| MSHD.net | Reference information lookup | Reference | 2011-01-18 |
| AddressingHistory | Historical online mapping service | Tools | 2010-12-14 |
| CDYNE Postal Address Verification | Postal address verification service | Security | 2010-11-10 |





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