Import and export data from a sftp server in xml or json to a filemaker database

Hello, I’ve a supplier who would make data available to me on a daily basis, I’ve to daily connect me via sftp to his server and download the data in a xml or Json file (I can choose what I prefer). This data after downloaded from the sftp server has to be integrated in a filemaker file. The same thing I have to make on the other way, data that I have in my filemaker file has to been exported in a xml or Json file and than uploaded to the sftp server of my supplier. I need to create this interface between the data from the sftp server and my filemaker file on download and upload.