OnCall Health is a free, open-source tool designed to detect unsustainable on-call workloads before they lead to burnout. It connects data from platforms like Rootly, PagerDuty, GitHub, Linear, and Jira, combining real activity signals with team check-ins to generate personalized risk scores. With AI-driven insights and team-specific baselines, it helps organizations intervene early, rebalance workloads, and protect engineer well-being while maintaining productivity.