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# SOCKS5 with DNS resolution on the proxy side (socks5h)
curl -x "socks5h://USER:PASS@PROXY_IP:PORT" \
     -L "https://api.ipify.org?format=json"

# SOCKS5 without local resolution — socks5
curl --socks5 "PROXY_IP:PORT" \
     --proxy-user "USER:PASS" \
     "https://httpbin.org/ip"

import requests

proxies = {
    "http":  "http://USER:PASS@PROXY_IP:PORT",
    "https": "http://USER:PASS@PROXY_IP:PORT",
    # for SOCKS5 you need pip install requests[socks]
    "socks5": "socks5h://USER:PASS@PROXY_IP:PORT",
}

r = requests.get("https://api.ipify.org?format=json", proxies=proxies, timeout=10)
print(r.json())  # {'ip': 'PROXY_IP'}

import { request, ProxyAgent } from 'undici';

const agent = new ProxyAgent('http://USER:PASS@PROXY_IP:PORT');

const { statusCode, body } = await request('https://api.ipify.org?format=json', {
  dispatcher: agent,
  headersTimeout: 10_000,
});

for await (const chunk of body) {
  console.log(chunk.toString());  // {"ip":"PROXY_IP"}
}

<?php
$ch = curl_init('https://api.ipify.org?format=json');

curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_PROXY,            'PROXY_IP:PORT');
curl_setopt($ch, CURLOPT_PROXYUSERPWD,     'USER:PASS');
curl_setopt($ch, CURLOPT_TIMEOUT,          10);

// For SOCKS5 uncomment:
// curl_setopt($ch, CURLOPT_PROXYTYPE, CURLPROXY_SOCKS5);

$response = curl_exec($ch);
echo $response;  // {"ip":"PROXY_IP"}
curl_close($ch);