What does Lemwatch monitor?

Lemwatch runs 20+ automated checks per site: uptime, response time, SSL/TLS expiry, domain expiry, DNS changes, sitemap health, broken links, content changes, SEO audits, mobile usability, security headers, and more.

Yes. The free tier monitors up to 5 sites. Pro is $19/month for 50 sites and Agency is $59/month for 100 sites, both with full feature access.

How is Lemwatch different from UptimeRobot or Pingdom?

Lemwatch bundles uptime, change detection, SEO audits, security scans, and a public API in one platform — features competitors charge separately for. It also includes team workspaces, white-labelled status pages, and a webhook system out of the box.

Does Lemwatch send alerts?

Yes. Lemwatch supports email, browser push, webhooks, and per-site notification routing so the right person hears about the right incident.

Is there a public API?

Yes. Pro and Agency plans get a public REST API with webhooks for sites, checks, incidents, and reports.

Why monitor a sitemap?

Sitemaps are the canonical list of pages a site wants indexed. Monitoring a competitor's sitemap tells you exactly when they publish new content, kill old content, or make structural changes — often days before you'd catch it browsing manually. Monitoring your own sitemap catches breakage before Google does.

What sitemap formats does LemWatch support?

XML sitemaps (standard), gzipped XML sitemaps (.xml.gz), sitemap index files (nested), and JSON sitemaps (rare but supported). Automatically follows sitemap index → child sitemap references up to 500 URLs per site.

How is this different from just crawling the site?

Faster and cleaner. A sitemap is the site's own declaration of what pages exist. Crawling can miss orphan pages and catches junk (search result pages, filters). Sitemap monitoring is the fast path to 'what did they publish today'.

Can I be alerted on new URLs matching specific keywords?

Yes. Set a keyword filter (e.g., 'blog', 'pricing', 'case-study') so only new URLs matching those patterns fire alerts. Great for competitive content intelligence without noise.

How often does LemWatch check sitemaps?

Every 6 hours by default (Free), hourly on Pro, custom intervals down to 15 minutes on Agency. Detected changes are diffed against the previous snapshot for precise add/remove reporting.

Is this included in the free tier?

Yes. Sitemap monitoring is included on the free tier (10 sites). Every site you add to LemWatch automatically detects and monitors its sitemap if one exists.

Feature

Sitemap monitoring for competitor intelligence

Track competitor sitemaps for new URLs, dropped URLs and broken sitemaps. Faster than crawling. Cleaner than browsing. Perfect for content and SEO teams.

What you can track

Watch any sitemap.xml

Monitor sitemap indexes and individual sitemap files. XML, gzipped XML and JSON sitemaps all supported.

New URLs alerts

Fire an alert the moment a competitor publishes a new page. Perfect for content marketing, SEO and competitive intelligence teams.

Removed URLs alerts

Catch when pages are dropped from the sitemap — a strong signal a competitor is pruning underperforming content or consolidating.

URL count trends

See rolling URL count history per sitemap. Spot content pushes, migrations, or accidental sitemap breakage.

Broken sitemap detection

Get alerted if the sitemap returns a 404, 500 or malformed XML — critical for your own SEO monitoring.

Keyword filters

Only alert on new URLs matching your keywords. Track a competitor's blog additions without noise from admin or template pages.

Slack, Discord, webhooks

Route sitemap alerts anywhere. Fire a webhook to your content team's Notion or your SEO team's Airtable.

Combined with visual monitoring

Detect a new URL in the sitemap AND monitor its visual/text content on the same LemWatch site. Full-funnel content intelligence.

Quick answer

How do I track changes to a sitemap.xml file?

Fetch the sitemap on a schedule and diff the URL set against the last snapshot — that tells you what a site published, what it removed, and whether the sitemap itself broke.

Formats: XML, gzipped XML, sitemap index files, JSON sitemaps
Reported: New URLs, removed URLs, total count trend
Breakage alerts: 404, 500 or malformed XML on the sitemap itself
Filtering: Keyword filters so only relevant new URLs alert

Everything we publish on sitemap monitoring

Facts checked: 14 September 2026 by the Lemwatch research team.

Last updated July 9, 2026

Sitemap Monitoring FAQ

See what competitors publish the moment they publish it

Free for 10 sites. No credit card.

Monitor sitemaps free

No credit card requiredFree forever planCancel anytime