HTTP, SSL, DNS, redirects
Status codes, response headers, SSL certificate validity and expiry, DNS resolution, domain expiration, redirect chain, and HTTP version (h1/h2/h3).
Uptime & Website Health Monitoring
NorthDuty uptime monitoring is more than a ping. Every 5 minutes by default, a single check returns HTTP status, SSL, DNS, redirect chain, blank-page detection, broken resources, JavaScript errors, and first-party API calls.
Every check returns status, SSL, DNS, and blank-page detection — not just a ping.
One check, everything you need to know about website health
Most uptime tools tell you whether the server replied. NorthDuty tells you that, plus whether the SSL certificate is valid, the DNS resolved correctly, the page actually rendered content, the scripts and stylesheets loaded, the front-end ran without errors, and the APIs the page depends on returned successfully.
It runs every 5 minutes by default and is configurable per project, with 1, 5, and 15 minute schedules supported. Every check also scores security headers, audits accessibility against WCAG guidelines, checks SEO fundamentals, and flags domain expiry — giving you a composite health score across seven dimensions in a single pass.
What every uptime check returns
One check, one timeline. Every run records the full picture so silent failures don't slip past you.
Blank-page & broken-resource detection
Flags pages that load with no visible text, images, canvas, SVG, or video, and reports 4xx/5xx responses on scripts, stylesheets, fonts, and other critical resources.
JavaScript errors & console.error
Captures runtime errors and meaningful console.error messages from a real browser context, so you see front-end failures, not just server responses.
First-party API call tracking
Tracks the XHR and Fetch calls the page makes, with status code and response time — useful for catching backend slowdowns that quietly break the user experience.
Security header scoring
Scores eight HTTP security headers — HSTS, Content-Security-Policy, framing protection, X-Content-Type-Options, Referrer-Policy, Permissions-Policy, and version disclosure — out of 100. Missing or weak headers fire configurable alerts.
Accessibility auditing (WCAG)
Runs an axe-core audit against WCAG 2A, 2AA, and 2.1AA rules in the real browser context. Violations are tiered by severity (critical, serious, moderate, minor) and contribute to the overall health score.
SEO fundamentals
Checks title tag, meta description, canonical URL, H1 count, image alt text, noindex flags, robots.txt, sitemap.xml, and Open Graph tags — the elements search engines rely on to crawl and rank your pages.
Alert rules for health checks and related failures
NorthDuty turns health-check results into configurable alert thresholds so teams can decide when a signal is important enough to notify.
Alert Rules
Health score, response time, SSL expiry, journey, and visual alerts in one settings view
Set thresholds for website health and related monitoring signals, including low health score, slow response time, SSL expiry, failed user journeys, and visual differences.
Why this matters
Uptime monitoring that only checks status codes misses most of the failures customers actually run into.
- Catch downtime and slow responses on the default 5-minute cadence
- See SSL expiry, DNS issues, and redirect problems before they cause incidents
- Detect blank pages and missing content even when the server returns 200
- Spot front-end and API failures that don't show up as classic outages
- Score security headers and get alerted when protection drops below your threshold
- Surface WCAG accessibility violations before users with assistive technology hit them
- Verify SEO fundamentals — title, meta, canonical, alt text, and sitemap — on every check
- Track domain expiry alongside SSL so registration lapses don't catch you off guard
- Get one consistent composite health score instead of stitching together separate tools
How NorthDuty uptime monitoring works
Add a URL, get a check every 5 minutes by default. Adjust the cadence anytime in settings.
1
Add your base URL
Create a project with your site's base URL. Uptime monitoring is enabled by default — no config required.
2
Checks run every 5 minutes by default
Each check executes from a real browser context and records HTTP, SSL, DNS, page-render, resource, JavaScript, and API signals together.
3
Adjust the cadence per project
Change the frequency in project settings without touching code or losing history.
4
Review the timeline and respond
Every run is timestamped with full context, so when something fails you know what changed and where to look first.
Related NorthDuty Pages
Explore pricing, feature details, solution pages, and related tools connected to this website monitoring use case.
Pricing
Pricing
NorthDuty pricing for website monitoring: Free, $29 Starter, $79 Pro, $199 Business, and $499 Enterprise plans.
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Features
Explore NorthDuty features: website health checks every 5 minutes, screenshot-based visual change detection, and AI-suggested user journey monitoring in one project.
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Solutions
Explore NorthDuty solutions for ecommerce website monitoring, SaaS website monitoring, agency website monitoring, and startup website monitoring.
Browse SolutionsFeature
Website Monitoring
Learn how NorthDuty combines health checks, screenshot diffs, and editable user journeys in one website monitoring project.
Explore Website MonitoringFeature
SSL Certificate Monitoring
Monitor SSL certificates with NorthDuty website health checks so validity, trust, and expiry issues are visible before visitors are blocked.
Explore SSL Certificate MonitoringFeature
DNS Monitoring
Monitor DNS resolution with NorthDuty as part of website health checks, so domain and resolution issues are visible before important pages become unreachable.
Explore DNS MonitoringFeature
Website Performance Monitoring
Monitor website performance signals, response timing, and rendering context on the pages and journeys that affect revenue, leads, and trust.
Explore Website Performance MonitoringFeature
Visual Regression Monitoring
Screenshot-based visual regression testing and website change detection for key pages — get pixel diffs on design, content, and layout changes, no code required.
Explore Visual Regression MonitoringFeature
User Journey Monitoring
NorthDuty AI suggests 2-5 website journeys. Enable them in one click or describe a custom multi-step flow in plain text.
Explore User Journey MonitoringSolution
Ecommerce Website Monitoring
Use NorthDuty for ecommerce website monitoring to protect product pages, cart, checkout, payments, and revenue-critical customer journeys.
View Ecommerce Website MonitoringSolution
SaaS Website Monitoring
Use NorthDuty for SaaS website monitoring to protect signup, login, onboarding, billing, and customer-facing application flows.
View SaaS Website MonitoringFrequently Asked Questions
Answers to common questions about this monitoring feature and when teams should use it.
How often does NorthDuty check uptime?
Every 5 minutes by default. The frequency is configurable per project in settings with 1, 5, and 15 minute options.
Does NorthDuty only check HTTP status codes?
No. Each check returns HTTP status, SSL, DNS, redirects, response timing, blank-page detection, broken resources, JavaScript errors, API call results, security header scoring, WCAG accessibility violations, SEO fundamentals, and domain expiry — all in a single run.
Can NorthDuty detect blank pages?
Yes. NorthDuty analyzes the rendered page for visible text, images, canvas, SVG, video, and styled surfaces, and flags pages that load without visible content.
What's the difference between uptime and website health monitoring?
In NorthDuty there isn't one. Uptime monitoring is a single check that also returns website-health signals (SSL, DNS, broken resources, JavaScript errors, API call results), so you don't need a separate product for it.
Call To Action
Start monitoring your website with NorthDuty today.
Get uptime monitoring that returns HTTP, SSL, DNS, blank pages, broken resources, JavaScript errors, API calls, security headers, accessibility violations, SEO fundamentals, and domain expiry in one check every 5 minutes by default.
Start on the free plan — add your base URL and monitoring starts in minutes.