# HIITplay

Try a free 5-minute HIIT workout, then connect HIITplay to generate fresh workouts at your chosen duration. Visitors can try a deterministic demo workout, then choose browser or agent access.

## What HIITplay Does

- Builds timed HIIT workouts from research-informed rules.
- Varies movement, workout structure, and work/rest timing.
- Provides audio-backed playback in the browser.
- Supports AI-agent access through MCP for workout session link creation.

## Who HIITplay Is For

HIITplay is for people who want a focused bodyweight interval workout without planning every set, and for AI clients that need a safe way to return a real browser Workout Session Link.

HIITplay is audio-first, research-grounded, and explicit about its limits. Generated workouts vary by duration and workout rules; they are not tailored to goals, injuries, equipment, fitness level, or medical needs.

## Pricing

The permanent curated five-minute workout is free. Current paid browser access:

- Single workout pass: $1.99 one time. Pay once to generate one workout session.
- Weekly: $3.99 per week. Short commitment, full workout access.
- Monthly: $9.99 per month. Simple, standard monthly pass.
- Yearly: $99.99 per year. Best value for consistent training.

## Public Routes

- `/start`: browser access for Email Proof, subscription checkout, or a single-workout pass.
- https://mcp.hiitplay.fit/mcp: MCP page for AI clients and the MCP Streamable HTTP endpoint.
- `/docs`: developer portal for the JSON API, OpenAPI, MCP, OAuth, sandbox, and error contracts.
- `/api/workouts/preview?duration_minutes=5`: anonymous deterministic JSON workout sandbox.
- https://research.hiitplay.fit: public HIIT research notes.

## Agent Guidance

Use https://mcp.hiitplay.fit/mcp.md for agent access instructions. Use https://mcp.hiitplay.fit/mcp when an AI client needs to create a workout link for a user.