If you use our FTP/SFTP server hosting service, please note the FTP and SFTP protocols are open-standard based. It means you don't need a special API from DriveHQ. You can use any regular FTP/SFTP library, or any FTP/SFTP software to connect to our FTP/SFTP server.
The FTP/SFTP server hosting service is a business feature. DriveHQ offers limited free FTP (and FTPS) trial to free/personal service members. For SFTP, you can sign up for a free business trial, or order a monthly business subscription, which you can cancel it online easily.
DriveHQ Cloud FTP/SFTP Server is integrated with our cloud IT service. It has a lot more advanced features and is far easier to setup and manage than a regular FTP/SFTP server. For detailed information, please watch this step-by-step tutorial video:
https://youtu.be/iGdBX4F1e-w