LatencySentry is in beta.Checks may be delayed, false positives are possible, and no production SLA is offered yet.
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LatencySentryAPI monitoring for developers
Real product workflow

See the screens your team uses when an API gets slow.

LatencySentry is built around one path: detect drift, inspect the evidence, and route the alert before an endpoint that is still up becomes customer pain.

WorkspaceSystem status
Live checks
Total monitors12
Healthy10
Slow / down2
Avg latency116 ms
MonitorStatusLast checkLatencyInterval
Checkout APIhttps://api.example.com/v1/checkout
Healthy12:01 PM42 ms1 min
Billing webhookhttps://hooks.example.com/stripe
Slow12:00 PM914 ms1 min
Search APIhttps://api.example.com/v1/search
Down11:59 AMtimeout5 min
Product proof

A focused monitor workflow, not another wall of charts.

These proof panels use anonymized monitor data, but the surfaces match the real workspace: status board, monitor detail, selected check inspector, notification evidence, and read-only API output.

System status

Scan all monitors in seconds.

The dashboard keeps the main question visible: what is healthy, what is slow, and what is down right now.

WorkspaceSystem status
Live checks
Total monitors12
Healthy10
Slow / down2
Avg latency116 ms
MonitorStatusLast checkLatencyInterval
Checkout APIhttps://api.example.com/v1/checkout
Healthy12:01 PM42 ms1 min
Billing webhookhttps://hooks.example.com/stripe
Slow12:00 PM914 ms1 min
Search APIhttps://api.example.com/v1/search
Down11:59 AMtimeout5 min
Monitor detail

Keep uptime and latency evidence together.

Recent checks, 7-day uptime, and the latency trend stay attached to the monitor that triggered the work.

Monitor detailsBilling webhookhttps://hooks.example.com/stripe
StatusSlow
Expected200
7-day uptime99.7%
48h avg138 ms
12:01 PMHealthy20042 msMatched expected response
12:00 PMSlow200914 msLatency crossed threshold
11:59 AMDown503timeoutExpected 200, got 503
11:58 AMHealthy20051 msMatched expected response
Check inspector

Open the exact result behind an alert.

Selecting a check shows URL, status, timestamp, and the diagnostic mismatch without pretending to store raw response bodies.

Check inspector

Select a check row to inspect the exact result and failure reason.

Monitor URLhttps://hooks.example.com/stripe
Status mismatch
Returned503
Expected200
StatusDown
Checked atJul 23, 12:00 PM
What users pay for

The paid value is speed, history, and cleaner handoffs.

01

Create the monitor

Add the URL, expected status, interval, and timeout. The worker starts checking without a browser tab staying open.

02

Catch the slow moment

Latency drift becomes visible before the endpoint fully fails, so the incident starts with evidence.

03

Route the alert

Email and Telegram alerts point back to the monitor detail and the selected check result.

Developer API

Use the same monitor state outside LatencySentry.

Paid plans include API access for internal dashboards, scripts, and runbooks. Tokens use short examples in public docs; the full token is only shown once in Settings.

curl https://www.latencysentry.com/api/v1/monitors \
  -H "Authorization: Bearer sls_live_xxxx"
{
  "monitors": [
    {
      "name": "Checkout API",
      "status": "healthy",
      "latencyMs": 42,
      "lastCheckedAt": "2026-07-23T12:01:00Z"
    }
  ]
}
Telegram alertBilling webhook is slow

914 ms response time. Expected status 200. Checked 12:00 PM.

Open alerting setup
Start small

Put one important endpoint under watch.

Free covers the first five monitors. Paid plans add faster checks, more monitors, longer raw history, and higher fair-use capacity.

Start monitoring free