Какой прокси для американские
нужен вашей задаче?

import requests

gateway = "http://user:pass@gw.proxyjam.com:7777"

routes = {
    "http": gateway,
    "https": gateway,
}

pick = {
    "X-PJ-Country": "US",
}

page = requests.get(
    "https://example.org/",
    proxies=routes,
    headers=pick,
)

print(page.status_code)

# pip install proxyjam
import requests
from proxyjam import ProxyJamClient

with ProxyJamClient(api_key="pj_live_...") as pj:
    bought = pj.orders.get("ord_...")

gateway = (
    f"http://{bought.proxy_username}:{bought.proxy_password}"
    f"@{bought.proxy_host}:{bought.proxy_port}"
)

page = requests.get(
    "https://example.org/",
    proxies={"http": gateway, "https": gateway},
)

print(page.status_code)

import axios from "axios";
import { HttpsProxyAgent } from "https-proxy-agent";

const gateway = "http://user:pass@gw.proxyjam.com:7777";
const tunnel = new HttpsProxyAgent(gateway);

const page = await axios.get(
  "https://example.org/",
  {
    httpAgent: tunnel,
    httpsAgent: tunnel,
    headers: { "X-PJ-Country": "US" },
  },
);

console.log(page.status);

curl -sS -x http://user:pass@gw.proxyjam.com:7777 \
     -H "X-PJ-Country: US" \
     -D - -o /dev/null \
     https://example.org/

import java.net.*;
import java.net.http.*;

var gateway = new InetSocketAddress("gw.proxyjam.com", 7777);

var http = HttpClient.newBuilder()
    .proxy(ProxySelector.of(gateway))
    .build();

var call = HttpRequest.newBuilder()
    .uri(URI.create("https://example.org/"))
    .header("Proxy-Authorization", "Basic dXNlcjpwYXNz")
    .header("X-PJ-Country", "US")
    .build();

var page = http.send(
    call, HttpResponse.BodyHandlers.ofString());

System.out.println(page.statusCode());

package main

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

func main() {
    gateway, _ := url.Parse(
        "http://user:pass@gw.proxyjam.com:7777")

    httpClient := &http.Client{Transport: &http.Transport{
        Proxy: http.ProxyURL(gateway),
    }}

    call, _ := http.NewRequest(
        "GET", "https://example.org/", nil)
    call.Header.Set("X-PJ-Country", "US")

    page, _ := httpClient.Do(call)
    fmt.Println(page.Status)
}