mon ☆

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Description:
Monitor hosts/services/whatever and alert about problems

Type: Formula | Tracked Since: Dec 28, 2025

Links: Homepage | formulae.brew.sh

Category: Devops

Tags: monitoring alerting devops sysadmin uptime

Install: brew install mon

About:
Mon is a simple, flexible monitoring tool that watches hosts, services, or any other resource for failures. It executes checks periodically and triggers alerts via various mechanisms when problems are detected. Its minimalist design makes it easy to configure and integrate into existing infrastructure for basic uptime and health monitoring.

Key Features:

Simple configuration using JSON or command-line arguments
Flexible check execution with custom commands or scripts
Multiple alert mechanisms including email, Slack, and HTTP webhooks
Lightweight and dependency-free for easy deployment

Use Cases:

Monitoring website uptime and HTTP response status
Watching critical background processes and restarting them on failure
Alerting on disk space or system resource thresholds

Alternatives:

Nagios – Nagios is far more comprehensive and complex, suitable for large enterprise environments, whereas Mon is minimal and ideal for simple, single-purpose checks.
Prometheus – Prometheus is a metrics-based monitoring system with a powerful query language, while Mon focuses on simple binary up/down state checks.

Version History

Detected	Version	Rev	Change	Commit
Sep 16, 2025 12:02am		0	VERSION_BUMP	0cdb4f5d