Monitor any URL for changes, not just whether it is up

Watch any URL for content, SEO, visual, and availability changes over time. SiteGauge checks the page on a schedule, and as soon as a check confirms a real change you get a screenshot, a plain-English AI summary, and an alert.

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Free forever on 5 monitors, no card Full read and write API on every plan
Checked hourlydocs.acme.com/pricingExample
Title tag rewrittenSEO
HTTP status200301
Pricing copy edited
AI summary7 / 10

This URL now 301 redirects and its title tag changed. Worth checking that the redirect target is correct and that the old page still ranks.

4 signals
Content, visual, SEO, and HTTP status
Every 2 min
Fastest check frequency, on Enterprise
Full API
Read and write, on every plan including Free
Unmetered
AI change summaries, no credits or caps

Point it at a URL and watch

Paste any URL and watch SiteGauge capture it. Pick the area to track and set a schedule, right here. No sign-up needed to look.

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What a URL monitor watches

A status ping tells you a URL responds. SiteGauge tells you what changed on it. Every monitor tracks four kinds of signal, and this is what makes it more than a page-level or uptime check.

Content changes

Copy edits, new or removed sections, and swapped links on the URL, captured as a track-changes text diff so you see exactly what moved.

Page monitoring

Visual changes

A real before and after screenshot comparison with slider, side by side, fade, and difference-overlay views. Desktop and mobile capture is available.

Visual monitoring

SEO and metadata

Title, meta description, H1, canonical, meta robots, schema markup, and hreflang, flagged even when the visible page looks unchanged.

Website monitoring

HTTP status and redirects

Watch a URL start returning a 404, a 301, or a server error, with the status change logged next to the content it used to serve.

Change alerts

A URL monitor is not an uptime check

Both look at a URL, but they answer different questions. Need a quick yes or no right now? Use our free uptime checker. Need to know when a URL changes over the following days and weeks? That is what a URL monitor is for.

A one-off uptime check

  • - Answers a single question: is this URL responding right now
  • - A snapshot in time, with no memory of what the URL said yesterday
  • - Silent about content, SEO, or layout edits that leave the page up
  • - Ideal for a quick manual spot-check before you commit to monitoring

A SiteGauge URL monitor

  • Checks the URL on a schedule and keeps a full change history
  • Tells you what changed: content, visual, SEO and metadata, or HTTP status
  • Scores each change and writes a plain-English AI summary
  • Alerts you as soon as a check confirms a genuine change

Run a quick uptime check or browse the free tools, then set up a monitor when you want to watch a URL over time.

How continuous URL monitoring works

A two-stage crawl keeps monitoring cheap: a light check runs on your schedule, and the expensive render only happens when there is something to see.

01

A light check runs on your schedule

Point SiteGauge at a URL, a list, or a whole sitemap. A cheap fetch and hash check runs as often as your plan allows, from daily to as fast as every 2 minutes.

02

A full render fires only on a real change

When a check confirms something moved, SiteGauge loads the URL in a real browser and takes a fresh screenshot. Two stages keep continuous monitoring cost efficient.

03

You get an AI summary and an alert

SiteGauge categorises the change, scores its importance, and explains what changed and why, then sends it to your channels with a before and after diff.

Checks run on a schedule, alerts land when it is real

SiteGauge is not a live stream and does not send push notifications. Each URL is checked on a cadence set by your plan, and you are alerted as soon as a check confirms a genuine change. Faster plans check more often.

Free
Daily
Standard
Hourly
Pro
Every 15 min
Business
Every 5 min
Enterprise
As fast as every 2 min
Compare plans and pricing See the alert workflow

Monitor one URL or thousands

Start with a single URL, or bring your whole site under monitoring at once. Each URL becomes its own monitor with its own schedule and history.

Add a list of URLs at once

Paste or import a list of URLs and turn each one into its own monitor, each with its own change history, in a single pass.

Whole domain or sitemap

Point SiteGauge at a domain or sitemap to track every page, with a tiered per-page cadence. Whole-domain and sitemap monitoring is on the Standard plan and up.

Cadence and history per page

Every URL keeps its own schedule and history, and new pages found in a sitemap can be added automatically as your site grows.

Built for automation

Manage URL monitors from code, an assistant, or your existing tools. The full read and write API is on every plan, including Free. Browse all integrations.

Full read and write API

Create and edit monitors, pull change history, and read AI summaries over a REST API. Read and write access is on every plan, including Free.

MCP server

Connect SiteGauge to Claude and other MCP clients so an assistant can set up URL monitors and answer questions about what changed.

Zapier and webhooks

Wire changes into thousands of apps through Zapier, using our REST-hook API and your API key, or fire your own webhooks on every confirmed change.

Who uses URL monitoring

From solo SEOs to whole teams. If you buy for a team, see website monitoring for teams.

SEO and technical teams

Get told the day a deploy strips a canonical, adds a noindex, or 301s a key URL, weeks before it surfaces in Search Console.

Competitive and market intel

Watch rival product, pricing, and launch URLs on a schedule, and share the change feed with unlimited free read-only viewers.

Agencies and ops

Monitor every client URL for content and status regressions, prove value with a full change history, and never get blindsided by a silent edit.

Stop re-checking URLs by hand

A manual status check catches a page that is down. It misses the edit that quietly changed everything else.

The old way

  • - Reload each URL by hand and hope you spot the diff
  • - A green status check that hides a rewritten title tag
  • - Find the change days after it shipped
  • - No screenshot, no history, no idea if it mattered

With SiteGauge

  • Every URL checked automatically on your schedule
  • Content, visual, SEO, and status changes all caught
  • Alerted as soon as a check confirms a real change
  • Screenshot, diff, AI summary, and full history each time

Monitoring a single page or section instead? See page monitoring or the broader website monitoring platform.

URL monitoring FAQs

What is URL monitoring?
URL monitoring means automatically checking a specific URL on a schedule and being told when it changes. SiteGauge goes beyond a simple up or down ping to watch what is actually on the URL: content, visual layout, SEO and metadata, and HTTP status. When a real change is confirmed it captures a screenshot, writes an AI summary, and sends you an alert.
How is a URL monitor different from an uptime checker?
An uptime or status check answers one question at one moment: is this URL responding right now. A URL monitor watches the same URL over time. It checks on a schedule, keeps a full history, and tells you when the content, SEO, or availability changes, not just whether the page is up. For a quick one-off status check use our free uptime checker; use a monitor when you want to know about changes over the following days and weeks.
What changes can SiteGauge detect on a URL?
Four broad signals: content (copy, sections, links, captured as a track-changes diff), visual (a real before and after screenshot comparison), SEO and metadata (title, meta description, H1, canonical, meta robots, schema, and hreflang, even when the visible body looks unchanged), and HTTP status and redirects. You can include or exclude specific parts of a page with CSS selectors to cut noise.
Is URL monitoring real-time, and how often does it check?
It is not real-time, and we will not pretend otherwise. SiteGauge checks on a schedule rather than continuously: daily on Free, hourly on Standard, every 15 minutes on Pro, every 5 minutes on Business, and as fast as every 2 minutes on Enterprise. As soon as a check confirms a real change you are alerted. There are no push notifications and no instant-detection promises.
Can I monitor many URLs at once?
Yes. Add a list of URLs in one pass and each becomes its own monitor with its own history, or point SiteGauge at a whole domain or sitemap to track every page with a tiered per-page cadence. Whole-domain and sitemap monitoring is available from the Standard plan up, and new pages found in a sitemap can be added automatically.
Does SiteGauge have an API for URL monitoring?
Yes. Every plan, including Free, has a full read and write REST API, so you can create and edit monitors, pull change history, and read AI summaries from your own stack. There is also an MCP server for assistants like Claude, plus Zapier through our REST-hook API and your API key, and webhooks on every confirmed change.
Is there a free plan?
Yes. The Free plan includes 150 checks a month, 5 monitors, daily checks, 30-day history, and screenshots, AI summaries, and API access, with no credit card required. Monitors pause at your plan limit rather than running up a surprise overage bill, and you can upgrade whenever you need faster checks or whole-domain monitoring.

Watch any URL, not just its uptime

Start free on 5 monitors with screenshots, AI summaries, and full API access included. No credit card required.

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