The dangerous part of an incident is often before “down.”
Response times climb, retries start, and users feel the product getting unreliable while the endpoint still technically answers. That is the window generic uptime tools are weakest at.
LatencySentry is in beta.Checks may be delayed, false positives are possible, and no production SLA is offered yet.
Latency-first monitoring for developers
Catch slow APIs before users complain.
Most uptime tools tell you when something is fully broken. LatencySentry tells you when an API is getting slow, failing, or drifting before users feel it.
No credit card • Free plan available • 1-minute checks on paid tiers
Live latency signal
Incident formingCatch drift while the API still looks “up.”
StatusDegraded
Latency842 ms
AlertTelegram + email
Latency threshold crossedUsers feel the slowdown before full downtime.
Checkout API200 but drifting • 214 ms → 487 ms → 842 ms
Recent evidenceExact failed checks stay attached to the monitor.
Operator outcomeAlert arrives before customers turn the slowdown into a ticket.
Why most uptime tools miss the real issue
Most uptime tools miss the part that actually hurts users first.
An API can still return 200 while already damaging the product. If your tool only tells you up or down, it misses the slow, unstable period before full failure. LatencySentry treats latency as a first-class signal.
- Uptime-only: the endpoint still returns, so the alert comes late.
- Latency-first: slowdown, drift, and failure become part of one operator workflow.
- Outcome: you react before customers turn a slow incident into support noise.
Why latency-first wins
Users feel slow APIs before they see full downtime.
The difference is simple: uptime-only monitoring tells you when something is broken. Latency-first monitoring tells you when it is getting dangerous.
Technically up. Practically too late.
Endpoint200 OKNo alert
- Endpoint still returns 200
- Latency is not treated as the main signal
- No alert until the problem becomes obvious
- Users complain before the team reacts
Operator outcome: users notice the issue first.
Slow, failing, drifting, and worth acting on.
StateDegradedAlerting
- Healthy, degraded, or down becomes visible fast
- Latency spikes are part of the main workflow
- Alerts arrive before the issue becomes customer-visible
- You move from signal to exact failing check without tool sprawl
Workflow proof
See the problem, the alert, and the evidence in one workflow.
LatencySentry is useful when it helps you go from first signal to exact failing check without bouncing between tools.
Know what needs attention immediately.
One board for monitor health, degraded states, recent latency, and the next operator decision instead of a stack of generic admin panels.
Total monitors300
Healthy294
Down6
Avg latency42 ms
Go from alert to exact failing check.
Open one monitor, inspect the visible trend, and move straight into the exact checks that triggered the incident.
7-day uptime99.82%
Selected checkReturned 503 • 842 ms
Get the signal where you will actually notice it.
Failure and recovery go to email and Telegram, so the alert lands in the places your team already watches under real pressure.
TelegramCheckout API latency spike • investigate now
Production value
Paid plans matter when speed starts to matter.
Free is enough to understand the product and watch a few endpoints. Paid tiers are where latency-first monitoring becomes much more useful in production.
Why teams pay
Faster checks and faster alerting mean you catch dangerous drift earlier, respond faster, and keep better incident evidence when a real outage starts.
Pricing
Start free. Pay when speed starts to matter.
The free plan is good for evaluation and light production visibility. Paid tiers are for teams that need faster checks, faster alerts, and more useful incident response.
Free
Good for evaluation and light production visibility.
- 5 monitors free forever
- 5-minute minimum checks
- 14 days raw logs
- Basic email alerts
- No credit card required
€9/month
Move from passive visibility to real production monitoring.
- 25 monitors
- 1-minute minimum checks
- Faster checks when latency starts drifting
- 30 days raw logs
- Email alerts and API access
€29/month
For teams where alert speed and latency incidents matter every day.
- 100 monitors
- 1-minute minimum checks
- Faster alerting plus longer incident evidence
- 90 days raw logs
- Email and Telegram alerting
€79/month
For larger production coverage with more headroom and longer retained history.
- 300 monitors
- 1-minute minimum checks
- Higher operational coverage
- 180 days raw logs
- Priority support posture
Paid tiers unlock 1-minute checks, which is where latency-first monitoring becomes much more useful in production. Yearly billing is available across paid tiers with 20% off annual pricing.
FAQ
Common questions before you start latency-first monitoring.
Is there a free plan?
Yes. You can start with 5 monitors on the free plan.
How often do you check endpoints?
Starter, Pro, and Business support 1-minute checks. Free starts with a 5-minute minimum interval.
Do you support private or internal APIs?
Not yet. Private and internal API support is planned for a future release.
Do I need a credit card?
No. The free plan does not require a credit card.
Start now
Start free, then move faster when production needs it.
Start with the free plan, watch a few real endpoints, and move into paid tiers when faster checks and faster alerts start to matter to production.