Cachet Core is the open-source engine behind Cachet 3.x status pages, giving your team a self-hosted page where incidents, maintenance windows, component health, and live metrics keep customers informed during downtime. You publish an incident with a name, status, and visibility, then post updates on its timeline as work progresses, and the public page reflects every change immediately. Services become components you can group and mark operational, degraded, partially out, or fully down, so visitors see exactly which part of your platform is affected. Maintenance gets scheduled ahead with its own updates, and subscribers receive notifications when new incidents appear or change. Custom metrics accept data points through the API and render as charts on the page, turning response times or queue depths into public proof of recovery. A JSON API creates and updates incidents from your monitoring stack, and webhooks push incident events to the chat rooms and tools your team already watches. The dashboard handles components, incidents, metrics, subscribers, tags, and user accounts, with status page customization and localization in more than 10 languages. Running on a dedicated VPS on RepoCloud with guaranteed CPU, RAM, and SSD, full root SSH access, and a browser serial console. MIT licensed.