script for site to book appointment auto without open the site

I'm looking to create a script to book visa appointments from embassies. I already have an embassy in mind, and the required details that need to be provided for the appointment are passport details for each applicant. This script will allow me to automate the process of booking visa appointments without having to open the website or manually fill out the form. The end goal is to have a system in place that streamlines the entire process, saving time and eliminating wasted energy.