Server Down.
Your Users Knew Before You Did.
Your API was returning 502s for 47 minutes. Users were getting errors. Support tickets were piling up. No one on your team had been paged.
✓ No credit card · ✓ 5-minute setup · ✓ Works with any server or cloud provider
Server failures surface through customers, not monitoring
Process managers restart services automatically — which means a server can look 'running' while serving nothing but errors. You find out when users complain.
Service crashed, users discovered it
Your API service crashed silently at 2am. The process manager restarted it — but the restart failed due to a config error. It looked 'restarted' in your dashboard. Users were getting 502s for 47 minutes.
CPU spike exhausted the server
A memory leak caused CPU to climb to 100% over 90 minutes. Response times degraded gradually. No single event triggered an alert. Users experienced slow responses for an hour before the process crashed.
Deploy succeeded, new version was broken
Your deployment pipeline reported green. The new version started. But it was serving 500s on the critical path because an environment variable wasn't set. 22 minutes of user-facing errors.
Server monitoring that alerts before users notice
NotiLens watches your server's heartbeat, resource thresholds, and post-deploy health — and alerts you the moment something goes wrong, not after users report it.
Service health monitoring
Monitor your server's heartbeat — a regular ping that confirms your service is alive and responding. If the ping stops arriving, NotiLens alerts within your configured window, before users start hitting errors.
Resource threshold alerts
NotiLens detects resource anomalies via your signal rules and auto-learned anomaly detection — set manual CPU/memory thresholds, or let NotiLens flag deviations from your server's normal baseline automatically.
Post-deploy health verification
After a deployment, monitor for the first 10–15 minutes of production traffic. If error rates or response times spike, NotiLens alerts your on-call immediately — before a bad deploy affects thousands of users.
Manual rules + auto anomaly detection
You get two layers of detection — not one. Set your own thresholds for what you know matters. NotiLens learns the rest automatically.
amount > $100. Fires only when your rule is met.What NotiLens sends when servers go down
Every alert fires within 60 seconds of detection — with the server name, failure type, and time elapsed so you can act immediately.
Process managers restart services automatically — which means your server can look 'running' while actually serving errors.
NotiLens monitors the heartbeat, not the process status. If your service isn't responding, you know immediately.
One caught incident pays for the year
A 47-minute outage during peak hours costs far more than a year of NotiLens. Here's what teams typically recover.
heartbeat gap detected — before users encounter errors
configurable heartbeat interval for production services
to add a heartbeat ping and set your silence threshold
Live in 5 minutes
No agents to install. No infrastructure changes. Add a heartbeat cron job and set your silence threshold.
Create a topic
Create a server-health topic in NotiLens. Copy the endpoint URL.
Add a heartbeat ping
Add a scheduled ping from your server every 1–5 minutes to signal it's alive.
*/2 * * * * root curl -s -X POST \
https://hook.notilens.com/webhook/TOPIC_ID/send \
-H "X-NOTILENS-KEY: SECRET" \
-H "Content-Type: application/json" \
-d '{"title":"api-prod heartbeat","type":"success"}'
Set your silence threshold
Configure: "Alert if no heartbeat received in 5 minutes." NotiLens watches continuously and fires the instant the window passes.
More ways to monitor your infrastructure
Server downtime alerts — common questions
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