Deterministic Diffs
Extract clean markdown so diffs are about content changes, not DOM churn.
Use Case Diff competitors
Diff competitors
without getting blocked
Competitive intel should be simple: extract, diff, alert. The hard part is the modern web. BrowserCity gives you bulletproof extraction primitives so your monitors don’t die quietly.
Stealth-First Crawling
Competitive pages are guarded. Stealth-by-default keeps your monitors alive and your data consistent.
Requests For 90%
Most competitive intel is extraction: pricing pages, changelogs, docs, status pages. Use Request API for speed.
Sessions For Auth
When competitors hide pricing behind dashboards, use Sessions (Playwright connect) and keep state across pages.
Screenshot Proof
When a diff fires, grab a screenshot/PDF with Humanized REST tools for quick triage and reporting.
Zero-Logs Posture
Competitive monitoring can be sensitive. Keep your run history and datasets out of vendor logs.
Hash + alert
Extract markdown, hash it, and alert when it changes. Pair this with screenshots/PDF for “proof” when stakeholders ask what changed.
pricing-watch.ts
import { createHash } from 'node:crypto';const authorization = ['Bearer', process.env.BROWSERCITY_API_KEY].join(' ');const page = await fetch('https://api.browser.city/v1/requests', { method: 'POST', headers: { Authorization: authorization, 'Content-Type': 'application/json' }, body: JSON.stringify({ url: 'https://example.com/pricing', markdown: true }),}).then((r) => r.json());const hash = createHash('sha256').update(String(page.content ?? '')).digest('hex');console.log({ hash });import os, requests, hashlibpage = requests.post( 'https://api.browser.city/v1/requests', headers={'Authorization': f"Bearer {os.environ['BROWSERCITY_API_KEY']}"}, json={'url': 'https://example.com/pricing', 'markdown': True},).json()import hashlibhash = hashlib.sha256((page.get('content') or '').encode()).hexdigest()print({'hash': hash})using System.Net.Http.Headers;using System.Net.Http.Json;var http = new HttpClient();http.DefaultRequestHeaders.Authorization = new( "Bearer", Environment.GetEnvironmentVariable("BROWSERCITY_API_KEY"));var page = await (await http.PostAsJsonAsync( "https://api.browser.city/v1/requests", new { url = "https://example.com/pricing", markdown = true })) .Content.ReadFromJsonAsync<Response>();var hash = Convert.ToHexString(System.Security.Cryptography.SHA256.HashData( System.Text.Encoding.UTF8.GetBytes(page?.Content ?? ""))).ToLower();Console.WriteLine(hash);record Response(string? Content);import com.fasterxml.jackson.databind.ObjectMapper;import java.net.URI;import java.net.http.*;public class PricingWatch { public static void main(String[] args) throws Exception { var req = HttpRequest.newBuilder(URI.create("https://api.browser.city/v1/requests")) .header("Authorization", "Bearer %s".formatted(System.getenv("BROWSERCITY_API_KEY"))) .header("Content-Type", "application/json") .POST(HttpRequest.BodyPublishers.ofString("{\"url\":\"https://example.com/pricing\",\"markdown\":true}")) .build(); var page = new ObjectMapper().readValue( HttpClient.newHttpClient().send(req, HttpResponse.BodyHandlers.ofString()).body(), Response.class); var digest = java.security.MessageDigest.getInstance("SHA-256") .digest((page.content() == null ? "" : page.content()).getBytes(java.nio.charset.StandardCharsets.UTF_8)); System.out.println(java.util.HexFormat.of().formatHex(digest)); } record Response(String content) {}}What teams monitor
Pricing pages
Changelogs
Docs updates
Status incidents
Terms changes
Job postings
Product marketing pages
Security pages
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