You are billed on an hourly basis for each of the protocols enabled, from the time you create and configure your server endpoint, until the time you delete it. You are also billed based on the amount of data uploaded and downloaded over your SFTP, FTPS, or FTP servers, number of messages exchanged over AS2, and the amount of data processed using Decrypt workflow step. When using SFTP connectors, you are billed for the amount of data transferred and the number of connector calls. Refer to the pricing page for more details.