openssh sftp does half of this. you can get a file with one or two args (sftp remote:file [localfile]), but to put a file you need to echo put; sftp localfile r

openssh sftp does half of this. you can get a file with one or two args (sftp remote:file [localfile]), but to put a file you need to echo put; sftp localfile remote:file gives "cannot connect to localfile".