WatchOut.run

⌚ Get workouts onto your Garmin

One-time setup, about 2 minutes

Garmin Connect can't import workout files directly, so WatchOut delivers through intervals.icu — a free training site with an official Garmin link. Once connected, every workout you send lands on your Garmin as a native structured workout: press start, follow the steps.

1 · Create a free intervals.icu account
intervals.icu — sign up (no card, free tier is plenty).

2 · Link your Garmin
In intervals.icu: Settings → Connections → Garmin — authorize, and enable “Upload planned workouts”. This is the pipe to your watch.

3 · Create an API key
In intervals.icu: Settings → Developer → Create API Key — copy it.

4 · Send your first workout
Open any WatchOut workout link, flip the toggle to Garmin, tap Send to Garmin watch and paste the key when asked. That's the last time — it's remembered by this browser, and every workout after that is one tap.

What to expect

The session appears on your intervals.icu calendar on the planned date, and syncs to the watch from there (open the Garmin Connect app to hurry a sync along).
Sending the same session again updates it — retuned workouts replace the old version, never duplicate.
Your API key stays in your browser and is sent only to intervals.icu — WatchOut.run has no accounts and never sees it. A “forget this key” link on every workout page removes it from the browser.

If something's off

“rejected that API key” — re-copy it from Settings → Developer; keys can be regenerated there too.
On the calendar but not on the watch — check Settings → Connections → Garmin shows connected with “Upload planned workouts” on, then sync the watch via the Garmin Connect app.
Heart-rate targets — intervals.icu expresses HR as % of your threshold HR, so set your HR zones there (or tell your AI coach your LTHR) for HR-target sessions to carry alerts.

Using an AI coach over MCP? It can do all of this for you — the connector at https://mcp.watchout.run includes the delivery method, and can send each session straight to your calendar if you choose to trust it with the key. Details for developers: /api.