# Sentinelboard

Sentinelboard is a monitoring platform for modern SaaS teams and indie makers.
It focuses on simple setup, actionable alerts, and one dashboard for uptime, infrastructure health, and LLM cost visibility.

## Product Positioning

- Built for teams that want monitoring without heavy ops setup.
- Emphasis on fast onboarding and practical defaults.
- Includes a free tier and usage-based pricing.

## Core Monitoring Coverage

- Web availability monitoring
- API response monitoring (with response body validation)
- Domain expiration monitoring
- Cron/heartbeat monitoring for scheduled jobs
- VPS/hosting renewal reminders
- Error tracking and failure spike visibility
- OpenRouter credit balance monitoring

## Website Availability Monitoring

Monitors website uptime with 1-minute check intervals. Sentinelboard sends an HTTP request to the target URL every 60 seconds, validates the HTTP status code, and records the response time. If a site goes down or responds with an error, alerts fire immediately.

Scenarios where this helps:
- A deployment breaks the homepage and returns 500 errors overnight.
- A DNS misconfiguration makes the site unreachable for a subset of users.
- SSL certificate expires and browsers start blocking the site.
- A CDN outage causes intermittent failures that are hard to catch manually.
- Response times slowly degrade from 200ms to 3+ seconds, signaling infrastructure issues before a full outage.

Feature page: https://sentinelboard.com/features/website-availability-monitoring

## API Response Monitoring

Goes beyond basic uptime checks by validating that API endpoints return the expected data, not just a 200 status code. Supports GET, POST, PUT, and DELETE methods with custom request bodies and headers. Checks run every 5 minutes. Includes response body fragment matching to verify specific data appears in the response.

Scenarios where this helps:
- A checkout API starts returning empty cart objects while still responding 200 OK.
- A third-party API silently changes their response format, breaking downstream parsing.
- An endpoint that normally responds in 200ms starts taking 5+ seconds due to a missing database index.
- A payment gateway returns success status codes but stops including transaction IDs in the response body.
- An authentication endpoint accepts requests but returns tokens with wrong scopes after a config change.
- A search API returns zero results for queries that should match, because an indexing job failed silently.

Feature page: https://sentinelboard.com/features/api-response-monitoring

## Cron Job & Heartbeat Monitoring

Monitors scheduled tasks and cron jobs using a heartbeat ping model. Each job sends an HTTP request to Sentinelboard when it completes. If the ping doesn't arrive within the expected interval, alerts fire. Supports intervals from 30 minutes to yearly. Includes a grace period with early warnings for delayed jobs before marking them as missed. Provides a 7-day check-in history showing expected vs. actual pings. Integration requires a single HTTP call — ready-made snippets provided for cURL, JavaScript, Python, Go, and Ruby.

Scenarios where this helps:
- A nightly database backup silently stops running and nobody notices until a restore is needed.
- A billing job skips a cycle and customers get charged twice on the next run.
- A data sync task hangs mid-execution, leaving downstream reports with stale data for days.
- A queue worker crashes and scheduled emails stop being sent, but the server stays healthy.
- A cleanup job that removes expired sessions stops running, causing storage to fill up gradually.
- A report generation job starts taking longer than its interval, overlapping with the next run.

Feature page: https://sentinelboard.com/features/cron-job-monitoring

## LLM Observability

- Trace-level visibility for LLM calls
: model, provider, tokens, cost, and duration.
- Hourly cost views and usage trends.
- Anomaly detection for unusual LLM spend/token spikes.

## Alerting Channels

- Email
- Slack
- Telegram
- Webhooks
- Additional channel messaging on the site may reference Discord/SMS.

## Canonical Site

- https://sentinelboard.com/

## Key Pages

- https://sentinelboard.com/pricing
- https://sentinelboard.com/onboarding
- https://sentinelboard.com/features/website-availability-monitoring
- https://sentinelboard.com/features/api-response-monitoring
- https://sentinelboard.com/features/cron-job-monitoring
- https://sentinelboard.com/privacy
- https://sentinelboard.com/terms

## Public Status Pages

- Status pages are published per slug:
- https://sentinelboard.com/status/{slug}

## Crawling Notes

- Marketing content is served as prerendered HTML on the homepage.
- App/dashboard pages require authentication and are user-specific.

## Machine-Readable Discovery

- Sitemap: https://sentinelboard.com/sitemap.xml