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Error Tracking

Catch bugs before your users complain. Smart deduplication, stack traces, and automatic incident correlation.

Start tracking free See pricing
3 unresolved Last 24h: 47 events
TypeError: Cannot read property 'id'
api/users.ts:142 • 23 events
NetworkError: Failed to fetch
lib/api.ts:67 • 18 events
ValidationError: email is required
handlers/signup.ts:34 • 6 events

Built for real debugging

Smart fingerprinting

Same error, one issue. Our fingerprinting algorithm groups similar errors automatically — even when stack traces differ slightly.

Spike detection

Get alerted when error rates spike. cmdline detects anomalies and notifies you before a small bug becomes a major incident.

Incident correlation

When your site goes down, we automatically link related errors to the incident. See the full picture when debugging outages.

Rich context

Stack traces, request details, user info, breadcrumbs, custom tags. Everything you need to reproduce and fix bugs fast.

Simple to integrate

1

Get an API key

Create an API key in your cmdline dashboard. Takes 10 seconds.

2

Send errors

POST to our ingestion endpoint from your error handler. Works with any language.

3

Start fixing

Errors appear in your dashboard, deduplicated and ready to triage.

error-handler.ts 
try {
  // your code
} catch (error) {
  await fetch('https://cmdline.io/api/ingest/errors', {
    method: 'POST',
    headers: {
      'Authorization': `Bearer $${API_KEY}`,
      'Content-Type': 'application/json'
    },
    body: JSON.stringify({
      title: error.message,
      stacktrace: error.stack,
      severity: 'error'
    })
  });
}

vs. Sentry

Sentry is great, but it's also expensive and complex. cmdline is simpler — and it's included in your subscription.

Feature cmdline Sentry Team
Error deduplication Yes Yes
Stack traces Yes Yes
Uptime monitoring Included Not available
Status pages Included Not available
Incident correlation Automatic Manual only
Per-seat pricing No Yes
Starting price $0 (included) $26/mo

Note: cmdline error tracking is designed for startup-scale. For complex enterprise needs with performance monitoring, session replay, and advanced debugging, Sentry may be a better fit.

Stop guessing. Start fixing.

Error tracking is included in every cmdline plan — even free.

Start free