Installing Navicat On-Prem Server Minimum hardware requirements • 2-core CPU • 2GB RAM Recommended hardware requirements • 4-core CPU or more • 8GB RAM or more • RAID-1 disk mirroring Disk provider based on your requirement: 41 Clickatell, Twillio or Others. API Key [Clickatell] Enter the unique API Key of your Clickatell account. Account SID [Twillio] Enter the unique Account [Twillio] Enter the sender's Twillio phone number or messaging service SID. HTTP API URL [Others] Enter the URL of the HTTP-API for sending SMS messages. POST / GET [Others] Choose to send SMS messages