実際のキャリアネットワーク上のGB単位のモバイルプロキシ、$0.96から

import requests

proxy = "http://USERNAME-cc-us:PASSWORD@gw.gbproxies.cc:11000"
r = requests.get("https://api.ipify.org?format=json",
                 proxies={"http": proxy, "https": proxy}, timeout=30)
print(r.json())

import { ProxyAgent, fetch } from "undici";

const agent = new ProxyAgent({
  uri: "http://gw.gbproxies.cc:11000",
  token: "Basic " + Buffer.from("USERNAME-cc-us:PASSWORD").toString("base64"),
});
const r = await fetch("https://api.ipify.org?format=json", { dispatcher: agent });
console.log(await r.json());

<?php
$ch = curl_init("https://api.ipify.org?format=json");
curl_setopt($ch, CURLOPT_PROXY, "http://gw.gbproxies.cc:11000");
curl_setopt($ch, CURLOPT_PROXYUSERPWD, "USERNAME-cc-us:PASSWORD");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
echo curl_exec($ch);

using System.Net;

var proxy = new WebProxy("http://gw.gbproxies.cc:11000") {
    Credentials = new NetworkCredential("USERNAME-cc-us", "PASSWORD")
};
using var http = new HttpClient(new HttpClientHandler { Proxy = proxy });
Console.WriteLine(await http.GetStringAsync("https://api.ipify.org?format=json"));

package main

import ("fmt"; "io"; "net/http"; "net/url")

func main() {
	p, _ := url.Parse("http://USERNAME-cc-us:PASSWORD@gw.gbproxies.cc:11000")
	c := &http.Client{Transport: &http.Transport{Proxy: http.ProxyURL(p)}}
	r, _ := c.Get("https://api.ipify.org?format=json")
	b, _ := io.ReadAll(r.Body)
	fmt.Println(string(b))
}

require "net/http"

uri = URI("https://api.ipify.org?format=json")
Net::HTTP.start(uri.host, uri.port, "gw.gbproxies.cc", 11000, "USERNAME-cc-us", "PASSWORD", use_ssl: true) do |http|
  puts http.get(uri.request_uri).body
end

curl -x http://gw.gbproxies.cc:11000 \
  -U "USERNAME-cc-us:PASSWORD" \
  "https://api.ipify.org?format=json"