Connecting Intervals.icu — setup and troubleshooting

Overview

Intervals.icu connects to FitGlue via an API key. Intervals.icu is a free training analysis platform. Once connected, FitGlue can both import activities from Intervals.icu (source) and upload enhanced activities to it (destination).

Authentication Type

API Key — Generated from Intervals.icu settings.

Setup

1. Get your API key — Log in to Intervals.icu → Settings → Developer → copy your API key.
2. Get your Athlete ID — Also available in Settings → Developer (the number in your Intervals.icu URL).
3. Connect in FitGlue — Dashboard → Connections → Intervals.icu → Enter your API key and Athlete ID.
4. Verify — Check the connection status changes to "Connected".

Common Issues

"Invalid API key" — Copy the key again, ensuring no extra spaces. The key is typically a long alphanumeric string.

"Athlete ID not found" — The Athlete ID is the numeric ID in your Intervals.icu URL (e.g., intervals.icu/athletes/i12345). Use the full format including the i prefix.

Activities not appearing — Intervals.icu receives activities from its own connected sources (Garmin, Strava). There's an inherent cascade delay.

Related

• Intervals.icu as a source
• Intervals.icu as a destination