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Intervals.icu API

Fitness Free key (no card)

AuthenticationFree key (no card)
Rate limitCommunity-documented guidance: about 5,000/day, 2,500 per 15 minutes, and 10/second per IP

Documentation: forum.intervals.icu ยท Checked Sep 13, 2026

About

Intervals.icu is a free training analytics platform that syncs with Strava, Garmin, and other services. Its API exposes activities, wellness data, training calendars, workout libraries, power curves, and gear. A personal API key is generated right in your own settings, so solo automation works with no app review process.

Details

Free to start. You may need a free key, but no credit card.

Auth: Free key (no card)

Rate limit: Community-documented guidance: about 5,000/day, 2,500 per 15 minutes, and 10/second per IP

Verified: 2026-09-13

Best for: cycling running training-analysis

Setup

  1. Create a free Intervals.icu account and connect your Strava or Garmin.
  2. Open Settings, go to the Developer section, and generate a personal API key.
  3. Use HTTP basic auth with your API key as the username.
  4. Pull activities, wellness, and calendar data from the v1 endpoints.
  5. Cache results where possible to stay within the published limits.