Hi Lorenzo, Smartsheet has an endpoint for that. The documentation is in the Attachments section, under List Row Attachments. In C#, here's what that would look like:

// Omit pagination parameters<br /> PaginatedResult<Attachment> attachments = smartsheet.SheetResources.RowResources.AttachmentResources.ListAttachments( 2252168947361668, // long sheetId 4293147074291588, // long rowId null // PaginationParameters );