A computer-implemented method interfaces with a remote attachment from a spreadsheet program on a client device. A first area in the spreadsheet associates with a top-level object in a web server, and a second area associates with a descendant object. On a first user interaction with a cell in the second area, a user interface item is shown, allowing uploading and/or downloading the attachment. When the user interacts to upload or download, the program uploads (or queues for upload) a selected attachment and modifies attachment metadata in the second area, or downloads the attachment based on attachment metadata in the second area. Communication between the spreadsheet program and the web server may be REST compliant.