Pricing

from $0.90 / 1,000 standard page checks

Website Change Monitor Pro – Visual Evidence

Monitor any public website for pricing, stock, content, SEO and visual changes. Get clear before-and-after values, a branded evidence report, focused screenshots for each detected visible change, severity scoring, noise suppression, and email, Slack or webhook alerts. No external AI key required.

Pricing

from $0.90 / 1,000 standard page checks

Rating

0.0

(0)

Developer

Troy Hendrick

Actor stats

Bookmarked

Total users

Monthly active users

3 days ago

Last modified

Categories

Automation

SEO tools

Developer tools

Web pages

startUrls

Optional

Public HTTP(S) pages to monitor. Authentication and private-network URLs are intentionally unsupported.

Type:array

What should be monitored?

mode

Optional

Automatic detects visible copy plus headings, links, CTAs, images and page metadata. Text compares copy only. Element limits comprehensive comparison to a CSS selector. Price, Stock and Visual use specialized rules.

Type:string

Default:auto

Options:

autotextelementpricestockvisual

CSS selector

selector

Optional

Optional selector such as main, #price, or .product-card. Required for Element mode and strongly recommended for Price or Stock.

Type:string

Render JavaScript

renderJavaScript

Optional

Use a real browser. Enable for client-rendered sites. Rendered checks use the higher rendered-page-check price event.

Type:boolean

Default:false

Automatic browser fallback

browserFallback

Optional

If a cheap HTTP check finds too little text, retry with a browser. The successful browser result is billed as a rendered check.

Type:boolean

Default:true

Advanced monitors

monitors

Optional

Objects support url, name, mode, selector, ignoreSelectors, ignorePatterns, renderJavaScript, browserFallback, and waitAfterLoadMs.

Type:object[]

Default:

[]

CSS selectors to ignore

ignoreSelectors

Optional

Examples: .cookie-banner, .live-clock, [data-ad].

Type:array

Default:

[]

Text patterns to ignore

ignorePatterns

Optional

Regular expressions removed before hashing, for example Updated at:.*$.

Type:array

Default:

[]

Save change evidence

captureOnChange

Optional

Save a branded evidence report, text, HTML, full-page captures, and focused before/after/difference screenshots. Baseline or changed HTTP checks may use a browser and the rendered-page-check event to produce screenshot evidence.

Type:boolean

Default:true

Full-page screenshots

fullPageScreenshot

Optional

Capture the full rendered page up to the safety height limit. Focused change screenshots are generated separately when the changed element can be located.

Type:boolean

Default:true

Browser width

viewportWidth

Optional

Viewport width in pixels for rendered checks and screenshots.

Type:integer

Minimum:320

Maximum:2560

Default:1440

Browser height

viewportHeight

Optional

Viewport height in pixels for rendered checks and screenshots.

Type:integer

Minimum:240

Maximum:2160

Default:900

Maximum screenshot height

maxScreenshotHeight

Optional

Maximum captured page height in pixels to control memory usage on unusually long pages.

Type:integer

Minimum:500

Maximum:20000

Default:20000

Browser settle time (ms)

waitAfterLoadMs

Optional

Extra wait after DOM load for client-rendered content.

Type:integer

Minimum:0

Maximum:30000

Default:1500

State store name

stateStoreName

Optional

Named key-value store used for rolling baselines.

Type:string

Default:systra-website-monitor-state

State namespace

stateNamespace

Optional

Change this to maintain an independent baseline set with the same URLs.

Type:string

Default:default

Alert on commercial changes

alertCommercialChanges

Optional

Notify for price, offer, and other commercially classified changes.

Type:boolean

Default:true

Alert on availability changes

alertAvailabilityChanges

Optional

Notify when stock or availability changes.

Type:boolean

Default:true

Alert on SEO changes

alertSeoChanges

Optional

Notify for title, description, canonical, robots, Open Graph, language, and other metadata changes.

Type:boolean

Default:true

Alert on high-impact changes

alertHighImpactChanges

Optional

Notify when change count or text/visual change percentage reaches the configured high-impact threshold.

Type:boolean

Default:true

Alert on all other changes

alertOtherChanges

Optional

Also notify for content, navigation, media, visual, and technical changes that do not match another enabled rule.

Type:boolean

Default:false

High-impact change count

highImpactChangeCount

Optional

Treat a result as high impact when it contains at least this many classified changes.

Type:integer

Minimum:1

Maximum:40

Default:3

High-impact change percentage

highImpactPercent

Optional

Treat a result as high impact when text, focused visual, or full visual change reaches this percentage.

Type:number

Minimum:0.1

Maximum:100

Default:5

Minimum alert severity

minimumAlertSeverity

Optional

Suppress notifications below this severity while retaining every detected result for audit.

Type:string

Default:medium

Options:

infolowmediumhighcritical

Suppress likely dynamic noise

suppressLikelyNoise

Optional

Do not notify for timestamp, counter, identifier, and similar volatile-content changes. Suppressed results remain visible in the dataset.

Type:boolean

Default:true

Email recipients

notificationEmails

Optional

Optional comma-separated list of 1–20 recipients for branded email alerts. Apify account and Send Mail Actor limits apply.

Type:string

Slack incoming webhook URL

slackWebhookUrl

Optional

Optional Slack incoming webhook for structured SYSTRA alerts with an evidence-report button.

Type:string

Custom webhook URL

webhookUrl

Optional

Optional public HTTPS endpoint notified with the complete result after alert rules and severity filtering pass.

Type:string

Custom webhook signing secret

webhookSecret

Optional

Optional secret used to create the X-Systra-Signature HMAC-SHA256 header. Use at least 8 characters.

Type:string

Proxy configuration

proxyConfiguration

Optional

Optional Apify Proxy configuration for websites that restrict direct data-center traffic.

Type:object

Default:

{
  "useApifyProxy": false
}

Maximum concurrency

maxConcurrency

Optional

Keep low for browser-heavy runs.

Type:integer

Minimum:1

Maximum:10

Default:3

Page timeout (seconds)

timeoutSecs

Optional

Maximum time allowed for each HTTP request or browser navigation.

Type:integer

Minimum:5

Maximum:180

Default:45

Maximum HTTP response bytes

maxBodyBytes

Optional

Safety cap for non-browser downloads.

Type:integer

Minimum:100000

Maximum:10000000

Default:3000000

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