Robots.txt Monitoring
Catch a robots.txt break within the hour, not days of lost traffic
A single misplaced line in robots.txt can block search engines from your entire site. One deployment, one accidental change, and your organic traffic can vanish overnight. We monitor your robots.txt continuously and alert you within an hour of any change – before it costs you rankings.
- Continuous Change Detection
- Visual Diff Comparison
- Syntax Validation
- Change Alerts
Want a one-off check first? Run the free robots.txt Tester – no signup, and your results are never kept.
Your entire site disappeared from Google. Nobody noticed for 6 days.
A developer pushed a staging robots.txt to production. By the time anyone noticed, Google had started de-indexing pages. Months of SEO work undone in hours.
An accidental 'Disallow: /' can block your entire site from search engines
Staging configurations get pushed to production without anyone noticing
Nobody reviews robots.txt changes in pull requests – they're not code
You only discover the problem when traffic drops or rankings vanish
By the time you notice, Google may have already started de-indexing
Re-indexing after a robots.txt mistake can take weeks or months
Every change tracked and validated
See your current robots.txt, validation status, and complete change history. Get alerted when sitemap URLs are blocked or rules change unexpectedly.
Continuous Change Detection
We check your robots.txt file every hour and detect any modifications. Whether someone added a new disallow rule or completely replaced the file, you'll know within the hour.
Visual Diff Comparison
When changes occur, see exactly what was modified with a clear side-by-side diff view. Quickly identify whether the change was intentional or a potential problem.
Syntax Validation
Robots.txt has specific syntax rules that are easy to get wrong. We validate your file against Google's rules and the RFC 9309 standard on every check, flagging errors and warnings that could cause unexpected crawler behavior.
Change Alerts
Turn on the alerts you care about: file changed, syntax errors, or sitemap URLs blocked. Each one tells you what triggered it, so you can judge in seconds whether the change was intentional.
Sitemap Reference Tracking
Monitor the sitemaps declared in your robots.txt and cross-check them against your crawl rules. Get alerted when your own rules block URLs listed in your sitemap.
Multi-Bot Analysis
Understand how your robots.txt affects different crawlers. See at a glance how your rules apply to Googlebot, Bingbot, AI crawlers like GPTBot and ClaudeBot, and more.
Version History & Comparison
Keep a version history of every robots.txt change for your plan's full retention window. When something goes wrong, quickly compare to previous versions to understand what changed and when.
URL & Draft Testers
Check any URL against your current rules to see which crawlers are blocked, or paste a draft robots.txt and preview its effect before you publish it.
Email & In-App Alerts
Receive notifications via email or in-app alerts when changes are detected. Stay informed about robots.txt modifications as soon as we catch them.
See exactly what changed, line by line
Every hourly check compares your robots.txt to its baseline. When it changes, a clear diff highlights every added and removed line, so you can spot an accidental "Disallow: /" the moment it lands instead of days after Google starts de-indexing.
- Every added and removed line highlighted
- Catch a blanket "Disallow: /" instantly
- Know within the hour, not days of lost traffic
Be the first to know when a rule changes
When a change, syntax error, or sitemap-blocking rule appears, you get an email and an in-app alert that spells out exactly what it affects. Take action before it costs you rankings.
- Alerts within an hour of any change
- Flags sitemap URLs blocked by your own rules
- Flags syntax errors that crawlers may ignore
See how each crawler is affected
One view shows how your rules apply to every major crawler at a glance – Googlebot, Bingbot, and AI crawlers like GPTBot and ClaudeBot – so you know exactly who can and cannot reach your site.
- Googlebot, Bingbot, GPTBot, ClaudeBot, and more
- Instantly see who is allowed or blocked
- Validated against Google's rules and RFC 9309
Continuous protection for your crawler access
Add your domain
Enter the domain you want to monitor. We'll immediately fetch your robots.txt and establish a baseline of the current configuration.
Set up alerts
Configure alerts for file changes, syntax errors, and sitemap blocking issues. Choose how you want to be notified when problems occur.
Hourly monitoring begins
We check your robots.txt every hour, comparing it to the baseline. Any changes are logged, analyzed, and stored in your version history.
Alerts on every change
When a change is detected, you're alerted with a detailed diff showing exactly what changed. Take action before it impacts your SEO.
Real scenarios, real fixes
"During a migration, someone pushed a different robots.txt to production. Your pages started disappearing from search results."
Hourly monitoring catches file changes and alerts you, so you can review and fix issues before Google processes the change.
"A staging robots.txt was accidentally deployed to production. Traffic dropped 40% before anyone noticed."
Change detection alerts notify you within an hour of any modification, letting you investigate and fix issues quickly.
"A client's developer made robots.txt changes without consulting you. You found out when rankings dropped days later."
Monitor all client sites from one dashboard. Get alerted to any robots.txt changes so you can review them immediately and tell the client what to fix.
Every module included. You only choose your coverage
All plans include all eight modules. Start free, upgrade only when you need wider coverage.
Free
Perfect for trying out VitalSentinel
- 1 domain
- 25K RUM page views/mo
- 100K analytics events/mo
- 6 months data retention
Lite
For consultants and growing businesses
- 5 domains
- 250K RUM page views/mo
- 5M analytics events/mo
- 16 months data retention
Stop losing organic traffic to one accidental line
Start monitoring your robots.txt in minutes. Get alerts before configuration changes impact your SEO.