For agencies managing client websites, the goal is simple: find problems before your clients do. That requires more than uptime checks — it means monitoring for the visual and functional failures that happen while the site is still technically online.
When a client's checkout breaks, their hero image disappears, or their login form stops working, the first call usually goes to the agency. Whether or not the issue was caused by something the agency did, the expectation is that the agency should have known first.
Basic uptime monitoring catches full outages — the server is down, the domain has lapsed, the SSL certificate has expired. But most of the website failures that cost clients revenue happen while the site is still technically online. A deploy removes a CTA, a third-party script injection covers the pricing section, a checkout step fails after a payment provider update.
Agencies that monitor at that deeper level — uptime, visual changes, and user journeys — can find and fix issues before the client's customers or the client themselves notice. That shifts the dynamic from reactive firefighting to proactive service.
NorthDuty is built around projects, where each project corresponds to one website and its base URL. An agency adds each client site as its own project. Uptime checks start immediately. Daily screenshot and pixel diff schedules run across all projects automatically.
Each project has its own monitoring settings, alert rules, and notification channels. An agency can route alerts for a client's checkout failures directly to that client's Slack workspace, or keep all alerts internal and triage before escalating.
Projects capture uptime every 1 minute (configurable down to 1 minute), daily visual diffs for each monitored page, and user journey runs for the flows that matter most per client — typically checkout, login, and the primary lead generation path.
Each type catches a different class of problem that affects client revenue or trust.
HTTP status, SSL expiry, DNS resolution, blank-page detection, JavaScript errors, broken resources, and first-party API calls — all in one check every 1 minute. This catches outages and front-end errors before clients see them.
Daily screenshots and pixel diffs catch unexpected layout changes, missing CTAs, removed content, and third-party injections. Agencies that deploy frequently benefit most — every deploy is implicitly tested against the previous visual baseline.
Monitoring checkout, login, and contact form flows confirms that the multi-step paths clients depend on for revenue actually work end to end — not just that the pages load.
After each launch, add the client site as a project in NorthDuty with the base URL. Uptime monitoring starts immediately and the AI suggests user journeys based on the detected pages and flows.
Enable the suggested journeys that match the client's business — checkout for ecommerce, login and signup for SaaS products, lead form for service businesses. For any flow the AI does not suggest, describe it in plain text and NorthDuty adds it as a monitored journey.
Configure alert notification channels per project. Email and Slack are the most common for agencies — email to an internal monitoring inbox, Slack to a client-specific channel for urgent issues.
A consistent post-deploy routine catches regressions while the changeset is still fresh.
After deploy, confirm HTTP status, SSL, DNS, and blank-page checks are all passing across the affected project.
Trigger a manual snapshot or wait for the next scheduled diff run. Review the pixel comparison against the pre-deploy baseline for any unintended changes.
Trigger journey runs for checkout, login, and any other critical flows on the client's site. Confirm each step passes before considering the deploy stable.
If any check fails, document the issue with the diff image or journey failure screenshot and notify the client with a clear description of the problem and the fix.
Agencies that catch and fix issues before clients notice build a different kind of relationship with their clients. Instead of being on the receiving end of angry calls, they are the ones proactively communicating that they spotted and resolved a problem.
That level of service is a genuine differentiator. It justifies ongoing retainer relationships, maintenance packages, and the perception that the agency is a reliable partner rather than a vendor that delivers and disappears.
Monitoring also creates accountability. When a client claims something broke, the agency has timestamped health check data, diff images, and journey run results that show exactly what changed and when.
Keep exploring the feature pages and commercial routes connected to this topic.
Solution
Monitor multiple client websites from one dashboard — uptime, visual changes, and user journeys across every project.
View Agency SolutionFeature
Get daily screenshots and pixel diffs for key website pages so unexpected design, content, and layout changes are easier to review.
Explore UI Changes MonitoringFeature
NorthDuty AI suggests 5 website journeys. Enable them in one click or describe a custom multi-step flow in plain text.
Explore User Journey MonitoringFeature
Monitor uptime every 1 minute with HTTP, SSL, DNS, blank-page detection, broken resources, JavaScript errors, and API call tracking.
Explore Uptime MonitoringPricing
Explore NorthDuty pricing for website monitoring covering uptime checks, UI change detection, and user journey monitoring.
Compare pricing plansShort answers that summarize the practical takeaways from this guide.
Add each client site as a separate project in NorthDuty. Each project runs uptime, visual diffs, and user journey monitoring independently with its own alert rules and notification channels.
Visual change detection and user journey monitoring. A deploy can break a client's checkout or remove a CTA while the site stays online. Those failures are only caught by screenshot diffs and journey tests.
NorthDuty supports email, Slack, and Telegram notification channels per project. Agencies can route alerts to internal inboxes for triage or directly to client Slack channels for urgent failures.
Yes. NorthDuty's project-per-site model is designed for agencies managing multiple client websites. The Growth plan includes all three monitoring types — uptime, visual diffs, and user journeys — across every project.
Use NorthDuty to monitor every client website for uptime, visual changes, and broken user journeys — and be the first to know when something goes wrong.