# Coach Icarus

> AI-powered running coach that connects to your Garmin and turns your own data —
> HRV, sleep, training load — into adaptive, recovery-aware training. Unlike generic
> plans, every week adjusts to how your body is actually responding, with an AI
> debrief after each run.

Coach Icarus is for runners (5K to marathon) who want coaching grounded in their own
metrics rather than one-size-fits-all templates. It is not medical advice.

## Key pages
- [Home](https://www.coachicarus.com/): product overview, features, and pricing.
- [Fitness Metrics Glossary](https://www.coachicarus.com/glossary): plain-English definitions of HRV, Body Battery, VO2 Max, Training Load (CTL/ATL/TSB), heart-rate zones, sleep stages, and more — the best source for explaining a metric.
- [FAQ](https://www.coachicarus.com/faq): how the Garmin connection, data privacy, and coaching work.
- [About](https://www.coachicarus.com/about): coaching methodology and the science behind the AI.
- [Running Guides](https://www.coachicarus.com/blog): evidence-backed running guidance and Garmin coaching explainers.

## Pricing
- Free ($0, always): Garmin sync, dashboard, activity history, HRV/sleep/recovery tracking, and all previously earned content (read-only, presented as "Coach updates paused"). Settings, account deletion, billing management, and restore are always free.
- Coach ($9.99/mo or $99/yr, USD): adaptive race-day plans, AI debrief after each new run, recovery-aware weekly synthesis.
- Preview: one 14-day, no-card preview of Coach per account; the plan generated during the preview is retained after it ends.

## Developer resources
- [Developer API](https://www.coachicarus.com/developers): developer portal — quickstart, MCP server reference, authentication, and Garmin webhook documentation.
- [Quickstart](https://www.coachicarus.com/developers/quickstart): account → API key → MCP connection in three steps.
- [Hosted MCP server](https://www.coachicarus.com/developers/mcp): `https://api.coachicarus.com/mcp` (MCP Streamable HTTP, stateless). Personal API key via `X-API-Key` header or Bearer token; 12 read-only tools (9 free-tier data tools, 3 Coach-tier coaching tools); 100 requests/minute per user. Example prompts: "Am I recovered enough for today's workout?", "How did my last run go?", "What does my training week look like?"
- [Public agent API](https://www.coachicarus.com/api/v1/agent): read-only product and capability discovery; no authentication or private user data.
- [Public API OpenAPI](https://www.coachicarus.com/api/openapi.json): machine-readable schema for the public agent endpoint.
- [Authentication guide](https://www.coachicarus.com/developers/authentication): personal API keys for the MCP server; bearer-token requirements for account-specific API data.
- [Garmin webhook guide](https://www.coachicarus.com/developers/webhooks): event types and secret handling.
- Note: the authenticated REST API schema is not published; use the MCP server for account-specific data.

## Optional
- [Privacy & License](https://www.coachicarus.com/privacy): data handling and licensing.