hevy-mcp

# hevy-mcp

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Unofficial MCP server for [Hevy](https://hevy.com). Design training programs in
chat; your AI creates the routines directly in your Hevy account and analyzes
your logged training. Requires a Hevy PRO API key (hevy.com/settings?developer).

## Use it

### Hosted (easiest — claude.ai web, mobile, desktop)
Add a custom connector in claude.ai → Settings → Connectors:

    https://hevy-coach.ajwallacemusic.workers.dev/mcp

You'll be prompted for your Hevy API key; it's stored encrypted in your own
OAuth grant and sent only to api.hevyapp.com.

### Claude Desktop one-click
Download [`hevy-mcp.mcpb`](https://github.com/almostjacked/hevy-mcp/releases),
double-click, paste your key when prompted.

### Local (Claude Code / Cursor / any stdio client)
    claude mcp add hevy -e HEVY_API_KEY=<key> -- npx -y @almostjacked/hevy-mcp

### Self-host (free, your own infra)

The published package ships the worker — no clone needed:

```bash
mkdir hevy-worker && cd hevy-worker && npm init -y
npm install @almostjacked/hevy-mcp wrangler
cat > wrangler.jsonc <<'EOF'
{
  "name": "hevy-mcp",
  "main": "node_modules/@almostjacked/hevy-mcp/dist/worker.js",
  "compatibility_date": "2026-07-01",
  "compatibility_flags": ["nodejs_compat"]
}
EOF
npx wrangler deploy
npx wrangler secret put AUTH_TOKEN     # any long random string — becomes your Bearer token
npx wrangler secret put HEVY_API_KEY   # from hevy.com/settings?developer
```

Add your worker URL (`https://hevy-mcp.<your-subdomain>.workers.dev/mcp`) to clients
that support custom headers — e.g. Claude Code:
`claude mcp add --transport http hevy-selfhost <url> --header "Authorization: Bearer <token>"`.
claude.ai custom connectors don't support custom auth headers; for claude.ai use the
hosted instance above, or front your worker with Cloudflare Access.

## Tools

| Tool | Description |
|------|-------------|
| search_exercises | Search the user's Hevy exercise library by name (fuzzy). Returns template id, exact title, type, muscle group and equipment. |
| list_routine_folders | List the user's routine folders (id + title). Check this before creating a folder — reuse an existing one when the name matches. |
| create_routine_folder | Create a routine folder, or return the existing folder if one with this exact title already exists (never duplicates). |
| list_routines | List the user's existing routines (id, title, folder_id, exercise_count). Use to avoid creating duplicates. |
| create_routine | create a routine (lb-first: weight_lb snaps to 2.5/5 lb increments; RPE folded into notes; supersets; duration/distance targets supported) |
| get_workouts | Get the user's most recent logged workouts, newest first, as compact summaries: title, date, duration, and per-exercise set count + top set. Use get_workout for full set-by-set detail of one workout. |
| get_workout | Get one logged workout with every set (weights in kg). Use the id from get_workouts. |
| get_workout_count | Total number of workouts the user has ever logged in Hevy. |
| get_exercise_history | past sets + estimated 1RM in lb for one exercise (full history, optional date range) |
| get_routine | Get one routine in full (all exercises and sets). Always call this before update_routine so you can send back the complete routine. |
| update_routine | Replace an existing routine. WARNING: this overwrites the routine — Hevy replaces its exercises with exactly what you send, so first call get_routine and include every exercise you want to keep. Folder cannot be changed here; duration/distance/custom-metric set targets round-trip safely. |
| get_training_summary | weekly sessions/volume (lb), sets per muscle group, top-lift 1RM trend |

## Privacy Policy
Your Hevy API key and training data pass through only to api.hevyapp.com.
The stdio/.mcpb versions run entirely on your machine. The hosted instance
stores nothing but your encrypted OAuth grant; disconnecting revokes it.
Nothing is logged or shared with third parties.