4sync is a file sharing and file storage application for web, desktop, and mobile. Users can upload, sync, share, and store files and documents across multiple platforms.
The 4sync API allows developers to access and integrate the functionality of 4sync with other applications and to create new applications. Some example API methods include managing accounts, adding and managing files, and retrieving files.
The 4sync SOAP API provides over 50 API functions like uploading and downloading files and deleting folders. The API gives access to 4sync's cloud synching, which is acknowledged to be among the least expensive deals available, featuring 15 gigabytes of free storage.