Surface area
Customer-facing issues
Watch the parts of your product customers notice first: uptime, working APIs, and error spikes.
Stop worrying about
what might break
Dead simple monitoring for your SaaS infrastructure. Monitor uptime, domains, LLM costs, and more. Get notified before your users do.
sentinelboard.com/dashboard
Email
Slack
Telegram
Discord
Webhooks
What breaks when you're not watching?
Every one of these is preventable with the right alert at the right time.
Your site goes down and you find out from a customer tweet. Hundreds of others left without telling you a thing.
Database backup silently stops running. You find out when you need to restore half year later.
An API changes its response format and your app silently breaks. The page is up but functionality is broken.
The domain renewal email went to an inbox nobody checks. Suddenly your website, email, and login system stop working.
...and a hundred other things can ruin your business when you're not watching.
Everything you need to monitor
A clearer view of what can break, grouped the way incidents actually show up.
One command center
Monitor the parts of your business that need attention.
Keep track of what customers feel, what background systems depend on, and what your AI stack is spending, all in one place.
Signals watched
8
Alert channels
5
Coverage
24/7
Customer-facing issues
Watch the parts of your product customers notice first: uptime, working APIs, and error spikes.
Jobs, renewals, and deadlines
Cover the quiet failures that hurt later: missed cron jobs, forgotten renewals, and expiring infrastructure.
LLM usage and spend
Monitor provider activity, unusual token spikes, and balance risk before your bill surprises you.
Add more monitors as your stack grows without turning the page into another checklist.
Background work
Jobs, renewals, and deadlines
Cover the quiet failures that hurt later: missed cron jobs, forgotten renewals, and expiring infrastructure.
Cron Heartbeat
Detect missed or late scheduled jobs the moment they drift.
Domain Expiration
Keep renewal dates visible instead of buried in an old inbox.
VPS / Hosting
Stay ahead of hosting renewals and infrastructure housekeeping.
AI operations
LLM usage and spend
Monitor provider activity, unusual token spikes, and balance risk before your bill surprises you.
Built-in LLM Observability
Track every OpenRouter call, monitor your credit balance, and get alerted when costs spike. Built-in anomaly detection catches unusual spending patterns automatically.
Track Every Call
Monitor every LLM API call with OpenTelemetry. See model, provider, tokens, cost, and duration in one place.
Credit Monitoring
Never run out of OpenRouter credits unexpectedly. Get alerted when your balance drops below your threshold.
Anomaly Detection
Z-score analysis on hourly cost and token data. Catch unusual spikes automatically before they hurt.
OpenRouter Traces
Cost Overview
Anomaly Detected
Total Cost
$4.23
Tokens
142k
Traces
847
Hourly Cost
Recent Traces
gpt-4.1-mini
1.2k$0.003
claude-sonnet-4-5
3.4k$0.012
gpt-4.1-mini
24k$0.087
Built for indie makers and small startups
You need monitoring that is quick to set up, affordable to start, and focused on the problems that actually matter.
Super simple setup
No complex configuration. Add your endpoints and you're done. Works with any stack.
Free to start
Start on the free tier for side projects, then move to an affordable paid plan when you need more coverage.
Built for lean teams
Made for indie makers and small startups that need useful monitoring without a dedicated ops team.
Covers the essentials
Monitor uptime, APIs, cron jobs, domains, and other quiet failures before they become customer-facing problems.
We'll let you know when something needs your attention
Alerts should fit into your workflow, not force you into another dashboard.
Alert delivery
Get notified on the channels you already use. No new app to learn, no giant alert center to babysit, just a direct message when something actually needs intervention.
Use the channels you already check.
Route noisy events away from your main inbox.
Keep critical alerts impossible to miss.
Choose where the alert lands. Keep urgent issues close and lower-priority signals somewhere quieter.
Email
Slack
Telegram
Discord
Webhooks
Stop worrying. Start shipping.
Join hundreds of indie developers who sleep better knowing their apps are monitored 24/7.
Free tier available · No credit card required