Sentinelboard

You can monitor web availability, APIs, cron jobs, domains, errors, and LLM costs in one place. Built for indie makers and small teams, this tool provides easy monitoring for your web services and AI agents to ensure everything stays running smoothly. Most indie developers end up with one service for uptime, another for cron jobs, a calendar reminder for domain renewals, and nothing watching LLM costs. Sentinelboard brings all of that into one simple dashboard. **What it monitors:** - Website availability (uptime + response time) - API responses with body validation — catches when the page is up but functionality is broken - Cron job / heartbeat monitoring — detects missed or late scheduled jobs - Domain expiration dates - Error tracking - LLM API calls, tokens, and costs via OpenTelemetry tracing - OpenRouter credit balance with spending anomaly detection - VPS / hosting renewal dates **Alerts where you already are:** Slack, email, Telegram, Discord, SMS, or webhooks. Pick the channel, set the threshold, done. **Built-in LLM observability** tracks every LLM call — model, provider, tokens, cost, duration — and runs automatic anomaly detection to flag unusual cost or usage spikes. If you're building with AI APIs and want cost visibility without setting up a separate observability stack, this covers it. Setup takes minutes. No infrastructure agents to install, no complex configuration — add your endpoints and monitors, and you're covered 24/7. Free tier for side projects. Usage-based tiers after that — no per-seat fees, no long-term contracts.