Catch website issues
what uptime tools miss.
Visual Sentinel checks your pages like a visitor: uptime, SSL, DNS, speed, content, and visual changes. Get alerted when a page goes down, slows down, or looks wrong.
One practical idea.
Check what visitors actually see.
Visual Sentinel watches visible page changes, uptime, SSL, DNS, speed, and server context from one dashboard, then alerts the channel your team already opens.
The site is online.
The page still looks wrong.
Catch broken checkout pages, missing images, expired certificates, DNS changes, slow pages, and layout shifts before customers or clients notice.
Reachable is not
the same as working.
On Apr 18 at 09:04 UTC an upstream CSS push turned the hero into a red wash and reflowed the footer. The site was still reachable. Our visual layer caught a 54.44% pixel delta (well past the 10% threshold) and woke the right human in 47 seconds.
🦉 versmos.com: UI changed 54.44%. Page reachable, but hero flooded red and footer reflowed. On-call paged.
Incidents that
resolve themselves
(when they should).
Every change becomes a timeline. AI drafts the postmortem and the customer-facing status update. Auto-resolve closes the incident the moment the monitor recovers (so on-call gets sleep back).
Every change, captured.
Roll back in two clicks.
A scheduled screenshot becomes a baseline. New captures are diffed against it. Promote any past capture to baseline. Cleanup, compare, sub-pages, full visual history per monitor.
Find the deploy that
made your site slow.
Real response-time history overlaid with uptime, plus PageSpeed scores and full CWV: LCP, FCP, CLS, TTFB, TCP, DNS. We scrape the same Lighthouse run Google does, every check, on a schedule.
Every cert. Every record.
Every change, dated.
Watch certificate chains 30 days out. Diff DNS records on every check, with snapshots and a full timeline, so a quiet hijack or a botched migration shows up in seconds, not Mondays.
The monitor knows the
server, not just the URL.
Pull zones from Cloudflare. Correlate every monitor with the box behind the proxy. When latency climbs, you see whose CPU spiked at the same moment (without a separate APM).
A status page that
shows real infrastructure.
One toggle per monitor publishes it. Whitelabel the brand, attach regional latency badges, and surface the boxes behind the proxy. Not a green checkbox dressed up as a page.
Your API is what your
app actually runs on.
Multi-step probes, JSON-path assertions, header checks, latency budgets and SLOs. Same alert fan-out as everything else (Slack, PagerDuty, OpsGenie, webhook, email).
Ten channels + Web Push.
One alert. No noise.
Per-monitor routing, per-severity escalation, quiet hours, and de-duplication so one outage isn't ten Slack pings. Each channel speaks the format of its host (not a stamped-out webhook payload). Web Push lands directly on the operator's device with one click to enable.
Slack#oncall-critical
WhatsApp+1 (555) 789-1285
Emailoncall@acefina.comTalk to your monitors
from Claude.
Visual Sentinel ships an MCP server, Claude Skills, and a full OpenAPI 3.1 spec. Drop the plugin into Claude Desktop, Cline, or Continue and ask 'what changed on acefina.com last week' (get a real answer, with screenshots).
Model Context Protocol server. Monitor, incident, and free-tool access from Claude Desktop, Claude Code, Cline, Continue.
Six prebuilt Claude skills (one per monitoring layer) that bundle MCP tools, prompts, and runbooks into a single click.
/triage-incidentPull the latest incident, screenshot diff, suggest a status update./explain-deployCompare yesterday vs today across uptime, perf, vitals, visual./dns-auditSnapshot + diff every record. Flag dangling, expired or hijacked./postmortemGenerate the markdown postmortem from the last incident timeline.Full OpenAPI 3.1 spec at visualsentinel.com/openapi.json. Bearer keys or session cookies. Generate clients in any language. Cursor, Claude, ChatGPT can all read it directly.
Scoped keys per integration. Per-key TTLs. Revoke from the dashboard, rotate on push.
Alerts that explain why,
not just what.
Connect Google, Cloudflare, and server agents. Visual Sentinel correlates uptime with traffic, infra, and root cause, so every page lands with context.
Match the page
to the site you run.
Know when an update breaks a page
Plugins change layouts. Themes drop sections. Shared-host certificates expire. We watch the visible page, SSL, DNS, and content together.
Catch store issues before customers do
Watch checkout pages, product grids, payment widgets, SSL, DNS, speed, and visual changes after plugin, theme, cache, or gateway updates.
Know when a release changed the page
Catch CSS breaks, missing components, slow pages, and layout shifts in production before users file tickets.
Know before your client sends the screenshot
Monitor every client site from one dashboard with per-client alerts, status pages, reports, and evidence when something changes.
Whether you ship one site
or a hundred.
From one side project to a hundred client sites, pick the tier that matches your monitor count, alert routing, and team size.
Website issue monitoring beats one ping.
Uptime tools are strong for availability. Visual Sentinel adds real-browser visual checks, content changes, SSL, DNS, speed, and server context at a lower starting price.