Get all Proton VPN IP addresses and export them into a CSV file

protonvpn_exit_ips.py

import requests
import csv

response_data = requests.get('https://api.protonmail.ch/vpn/logicals')

response_json = response_data.json()

ip_list = []

for server in response_json['LogicalServers']:
    for server_info in server['Servers']:
        exit_ip = server_info['ExitIP']
        ip_list.append(exit_ip)

with open('protonvpn_exit_ips.csv', mode='w', newline='') as file:
    writer = csv.writer(file)
    writer.writerows(zip(ip_list))

num_ips = len(ip_list)
print(f"{num_ips} exit IPs exported to protonvpn_exit_ips.csv")

Response to my own comment:
This script exports a list of extit server IPs for Proton VPN. So, this list could be used to block incoming connections to an internet resource from the users coming through the Proton VPN service. However, this list can't be used to block users on the LAN from connecting to Proton VPN because such a list needs to have entrance (or ingress) VPN servers, not exit (or egress) VPN servers.

I would love a hint on how to obtain a list of entrance (or ingress) VPN server IPs for Proton VPN.