Synthetic monitoring
that doesn’t flake

import { chromium } from "playwright";const apiKey = process.env.BROWSERCITY_API_KEY!;const opts = { method: "POST", headers: { Authorization: `Bearer ${apiKey}` } };const session = await fetch("https://api.browser.city/v1/sessions", {  ...opts,  body: JSON.stringify({    browser: "chromium",    egress: { mode: "managed", proxyType: "residential", country: "US" },  }),}).then((r) => r.json());const browser = await chromium.connect(session.endpoint, {  headers: { Authorization: `Bearer ${session.token}` },});const context = await browser.newContext();const page = await context.newPage();await page.goto("https://example.com");const title = await page.title();if (!title.toLowerCase().includes("example")) throw new Error("unexpected title: " + title);

import osimport requestsfrom playwright.sync_api import sync_playwrightapi_key = os.environ["BROWSERCITY_API_KEY"]session = requests.post(    "https://api.browser.city/v1/sessions",    headers={"Authorization": f"Bearer {api_key}"},    json={        "browser": "chromium",        "egress": {"mode": "managed", "proxyType": "residential", "country": "US"},    },).json()with sync_playwright() as p:    browser = p.chromium.connect(        session["endpoint"],        headers={"Authorization": f"Bearer {session['token']}"},    )    context = browser.new_context()    page = context.new_page()    page.goto("https://example.com")    title = page.title()    if "example" not in title.lower():        raise RuntimeError(f"unexpected title: {title}")

using Microsoft.Playwright;using System.Net.Http.Headers;using System.Net.Http.Json;var apiKey = Environment.GetEnvironmentVariable("BROWSERCITY_API_KEY")!;var http = new HttpClient();http.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", apiKey);var res = await http.PostAsJsonAsync(  "https://api.browser.city/v1/sessions",  new {    browser = "chromium",    egress = new { mode = "managed", proxyType = "residential", country = "US" },  });var session = await res.Content.ReadFromJsonAsync<Session>() ?? throw new Exception("bad response");using var pw = await Playwright.CreateAsync();var browser = await pw.Chromium.ConnectAsync(session.endpoint, new() {  Headers = new Dictionary<string, string> {    ["Authorization"] = $"Bearer {session.token}",  },});var context = await browser.NewContextAsync();var page = await context.NewPageAsync();await page.GotoAsync("https://example.com");var title = await page.TitleAsync();if (!title.ToLowerInvariant().Contains("example")) throw new Exception("unexpected title: " + title);public record Session(string endpoint, string token);

import com.microsoft.playwright.*;import java.net.URI;import java.net.http.*;// Create session via your preferred HTTP clientvar apiKey = System.getenv("BROWSERCITY_API_KEY");var auth = "Bearer " + apiKey;var http = HttpClient.newHttpClient();var res = http.send(  HttpRequest.newBuilder()    .uri(URI.create("https://api.browser.city/v1/sessions"))    .header("Authorization", auth)    .POST(HttpRequest.BodyPublishers.ofString(      "{\"browser\":\"chromium\",\"egress\":{\"mode\":\"managed\",\"proxyType\":\"residential\",\"country\":\"US\"}}"))    .build(),  HttpResponse.BodyHandlers.ofString());var sessionJson = res.body();var endpoint = extractField(sessionJson, "endpoint");var token = extractField(sessionJson, "token");try (var pw = Playwright.create()) {  var browser = pw.chromium().connect(    endpoint,    new BrowserType.ConnectOptions().setHeaders(      java.util.Map.of("Authorization", "Bearer " + token)));  var context = browser.newContext();  var page = context.newPage();  page.navigate("https://example.com");  var title = page.title();  if (!title.toLowerCase().contains("example")) throw new RuntimeException("unexpected title: " + title);}static String extractField(String json, String key) {  // Use a proper JSON parser in production. This is intentionally minimal.  var i = json.indexOf("\"" + key + "\"");  if (i < 0) return "";  var start = json.indexOf('"', i + key.length() + 2);  var end = json.indexOf('"', start + 1);  return (start >= 0 && end > start) ? json.substring(start + 1, end) : "";}