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ZERO-NOISE WEB SURVEILLANCE

Catch Silent Web Changes Before Your Users Notice.

Headless Chromium monitoring with automated noise neutralization. Detect pricing fluctuations, API deprecations, and sneaky copy updates with pixel-perfect visual diffs.

Start Monitoring Free Try Interactive Diff Sandbox ↓
0 False Alerts
Volatiles Auto-Filtered
100% Isolated
Dual-Layer SSRF Shield
< 500ms
Computer Vision Diff
Store-On-Change
Zero Storage Bloat
LIVE INTERACTIVE SHOWCASE

Experience The Visual Diff Engine

Drag the slider below to reveal how ChangeWatch spots sub-pixel regressions and pricing changes in real-time.

https://store.hardware.io/gpu/rtx-5090
PRICE DROP & DELISTED
View Mode:
Baseline: 10:00 AM → Changed: 10:15 AM
BASELINE CAPTURE

GeForce RTX 5090 Ultra OC

32GB GDDR7 • 512-bit Memory Interface

$1,999.00 ● In Stock (Limit 1)
Shipped directly by Manufacturer. Standard 3-Year Warranty included.
NEW CAPTURE (10:15 AM)

GeForce RTX 5090 Ultra OC

32GB GDDR7 • 512-bit Memory Interface

$1,849.00 ● Sold Out — Backorder
FLASH SALE: -$150 Price reduction detected automatically.
↔
Deduplication Hash: sha256:7e8a91b... Alert Dispatched to Discord & Webhook
ENGINEERING INTEGRITY

Built For Zero-Noise Surveillance

Standard monitors spam your inbox with random timestamp drifts and layout shifts. ChangeWatch filters the garbage so alerts actually matter.

NOISE FILTERING PIPELINE FR-04 COMPLIANT

Automated Volatile Element Neutralization

Dynamic timestamps ("3 minutes ago"), ISO dates, session tokens, and like counters change on every page visit without any real content shift. Our regex pipeline neutralizes volatiles before computing the SHA-256 state hash.

Input Raw Content Hash would mutate!
"Latest Announcement — Posted 4 minutes ago • 1,280 views"
Normalized ChangeWatch State Stable Hash Preserved
"Latest Announcement — Posted [volatile-timestamp] • [volatile-counter]"
POINT & CLICK

Interactive Visual Region Studio

Click any card or element in the sandboxed preview to isolate it. Ignore ads, popups, and footers while focusing exclusively on what matters.

Watch Scope: #pricing-table
Noise Filter: .cookie-banner
MULTI-CHANNEL DISPATCH

Discord, Email & Webhooks

Rich Discord webhook embeds with pre-rendered diff previews and direct links to Diff Studio. Complete idempotency via deduplication keys.

ChangeWatch Bot
GPU Price Drop: $1,999 → $1,849
Dedupe: 4b29-e81c (Suppressed Duplicates: 0)
ZERO-TRUST SECURITY ENTERPRISE HARDENED

Two-Tier SSRF Defense Fortress

Allowing headless browsers to navigate user-supplied URLs is dangerous without strict containment. ChangeWatch blocks private RFC 1918 addresses, loopbacks, and cloud metadata endpoints before navigation, plus intercepts every outgoing subresource request inside Playwright.

Pre-DNS Filter
Blocks 127.0.0.1, localhost, and IPv6 loopbacks.
Metadata Shield
Rejects AWS & GCP 169.254.169.254 link-locals.
Subresource Guard
Playwright aborts redirects to private subnets.
BONUS CAPABILITY

Numeric Value Tracking & Trend Sparklines

Provide a CSS selector (e.g. .price-tag or #eth-rate) to parse currencies ($ / € / £ / ₹), percentages, and stock counts. ChangeWatch plots a smooth SVG sparkline trend graph over time.

Currency Parser
Historical Sparkline
Keyword Gating
Current Value: $1,849.00
Low: $1,849 High: $1,999
WORKFLOW

Three Steps To Total Clarity

01

Define Target URL & Interval

Input any publicly accessible webpage and set your monitoring cadence from 15 minutes to daily. Choose your sensitivity threshold.

02

Isolate Regions & Keywords

Use our interactive inspector to point-and-click target sections. Specify optional trigger keywords to suppress uninteresting edits.

03

Receive Actionable Diffs

When meaningful changes occur, receive instant notifications with side-by-side screenshots, pixel masks, and accessible text snippets.

QUESTIONS & ANSWERS

Frequently Asked Questions

How does ChangeWatch prevent false-positive change alerts? ↓
ChangeWatch applies a multi-stage noise normalization pipeline before computing SHA-256 content hashes. Relative timestamps (like "5 minutes ago"), ISO dates, and dynamic view/like counters are systematically sanitized. You can also specify ignore CSS selectors or sensitivity thresholds.
How is server-side request forgery (SSRF) blocked? ↓
Every URL is checked against RFC 1918 private IPv4 subnets, IPv6 loopbacks, localhost hostnames, and cloud metadata IP ranges (169.254.169.254) prior to navigation. In addition, Playwright's network routing intercepts all outbound subrequests and aborts any malicious redirects.
What happens when a monitored site doesn't change? ↓
ChangeWatch enforces a strict store-on-change policy. When a check run detects identical normalized content, it only updates execution logs and timestamps. Unchanged screenshots and DOM copies are never stored, preventing disk bloat.
Can I monitor single elements like prices or changelogs? ↓
Yes! You can use the Interactive Region Studio to visually click any element to watch. You can also configure Numeric Value Tracking to follow prices or stock numbers over time, with automatic trend lines.
DEPLOY IN SECONDS

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