You’ve found the Epson Connect Developer Page!
The Epson Connect API enables app developers to quickly add print capability to their app using Epson’s cloud service “Epson Connect”.
Epson Connect API
The Epson Connect API provides ways of controlling and executing printing to the Epson device (such a printer) connected to Epson's cloud service "Epson Connect". It offers the capability to print files to a remote printer easily.