Hi! To download a file from Dropbox is easy: ZnClient new https; host: 'content.dropboxapi.com'; addPath: '2'; addPath: 'files'; addPath: 'download'; headerAt: 'Authorization' put: 'Bearer <my generated access token>'; headerAt: 'Dropbox-API-Arg' put: '{"path": "/demo.txt"}' ;get. But I cannot figure out how to get file metadata (https://www.dropbox.com/developers/documentation/http/documentation#files-ge...). If I try the following (ZnClient new https; host: 'api.dropboxapi.com'; addPath: '2'; addPath: 'files'; addPath: 'get_metadata'; headerAt: 'Authorization' put: 'Bearer QfCCKhxI-HwAAAAAAAAGdeT916yqY4tkX3EN6EW2S3EMxYyv5Xky9LeCxuGi8_o7'; headerAt: 'Content-Type' put: 'application/json'; formAt: 'path' put: 'demo.txt'; post). I get the error message from Dropbox: Error in call to API function "files/get_metadata": Bad HTTP "Content-Type" header: "application/x-www-form-urlencoded". Expecting one of "application/json", "application/json; charset=utf-8", "text/plain; charset=dropbox-cors-hack". Probably I am using ZnClient wrongly. Johannes