Checkmate

Checkmate is an open-source monitoring application for tracking website and service uptime, response times, and operational incidents. It also supports deeper infrastructure visibility (CPU, RAM, disk, temperatures) via an optional remote agent.

Key Features

• Uptime and availability monitoring for websites and endpoints
• Response time tracking and performance visualizations
• Multiple monitor types including ping, port, SSL, and JSON query checks
• Incident tracking, scheduled maintenance, and public status pages
• Notifications via email and webhooks, with integrations such as Discord and Slack
• Optional infrastructure, Docker, and disk/mountpoint monitoring via the Capture agent
• Multi-language user interface

Use Cases

• Monitor homelab or small-business services and get alerted on outages
• Publish a status page for customers or internal stakeholders
• Track service responsiveness and investigate recurring incidents

Limitations and Considerations

• Advanced server hardware metrics require deploying the separate Capture agent on monitored machines

Checkmate is designed to be lightweight and scalable, and can be deployed for anything from a small homelab to larger environments with many active monitors. It provides a practical mix of uptime checks, incident visibility, and optional host-level insights in a single interface.