Develop and Test
API Specification
Web Service (RESTful)
Full documentation for Trackable Item API(Posting), (Postage), (Tracking) can be found Here
Web Service (SOAP)
Full documentation for Trackable Item API(Posting), (Postage), (Tracking) can be found Here
Full documentation for Bulk Mailing API can be found Here
Full documentation for Speedpost API can be found Here