Lightweight LLM Usage Monitoring with Cron: A Practical Guide

As LLMs become integrated into daily workflows, understanding usage patterns is critical for cost management and capacity planning. This guide demonstrates a simple approach using Linux's built-in cron scheduler to log and analyze LLM API calls. By setting up a cron job to periodically record usage metrics, developers can identify peak hours, detect anomalies, and plan for scaling. The method requires minimal setup and leverages existing infrastructure, making it ideal for small teams and individual developers. Key benefits include real-time visibility into consumption, easier budget tracking, and proactive issue detection. This lightweight solution complements more comprehensive observability platforms, offering a quick start for those new to LLM operations.