Mobile proxies for ad verification

export PROXY_URL="http://USERNAME-mbl-us-sid-check01-rot-auto10:[email protected]:7000"

# Copy your exact URL from the dashboard — USERNAME and PAK_KEY are yours.
# The -sid- token picks a device; vary it per check (see rotation, below).

import { chromium } from 'playwright';

const url = new URL(process.env.PROXY_URL);

const browser = await chromium.launch({
  proxy: {
    server: `http://${url.host}`,
    username: decodeURIComponent(url.username),
    password: decodeURIComponent(url.password),
  },
});

const page = await browser.newPage({
  viewport: { width: 390, height: 844 },   // iPhone-class viewport
  isMobile: true,
  deviceScaleFactor: 3,
});

// Record every ad request the page makes, so you can evidence what served.
const adCalls = [];
page.on('request', (r) => {
  if (/doubleclick|googlesyndication|adnxs|criteo|rubiconproject/.test(r.url())) {
    adCalls.push({ url: r.url(), type: r.resourceType() });
  }
});

await page.goto('https://publisher.example/article', { waitUntil: 'networkidle' });
await page.screenshot({ path: 'placement.png', fullPage: false });

console.log(`exit IP served ${adCalls.length} ad calls`);
console.table(adCalls.slice(0, 10));

await browser.close();

The screenshot is your evidence artifact; adCalls is the audit trail of which exchanges actually bid.

import os, requests

proxy = os.environ["PROXY_URL"]
proxies = {"http": proxy, "https": proxy}

# Always assert geo before a verification sweep. A run from the wrong
# country is worse than no run — it looks like a delivery failure.
who = requests.get("https://ipinfo.io/json", proxies=proxies, timeout=30).json()
assert who["country"] == "US", f"expected US exit, got {who['country']}"
print(f"verifying from {who['city']}, {who['org']}")

Cheap, and it turns a whole class of silent false negatives into a loud assertion.