cairn

Self-hosted wellness OS. A coaching team reads your labs, lifting, running, food and sleep as one picture, suggests the one thing worth doing today, and makes the small calls with a one-tap Undo. PWA + REST + MCP. No scores, no nudges.

Code-only MCP server: no hosted endpoint, so you install and run it yourself. It is not probed, graded or counted in our reachability statistics.