Intervals.icu API

Use the Intervals.icu API via direct curl calls to access activities, wellness, workouts, calendar events, and athlete profiles.

Official docs: https://intervals.icu/api/v1/docs

When to Use

Use this skill when you need to:

• View athlete profile - get athlete info and settings
• List and manage activities - view rides, runs, and other activities with streams data
• Track wellness - access daily wellness records (sleep, fatigue, soreness, etc.)
• Manage workouts - list, create, and modify workout library entries
• Calendar events - view and create planned workouts and events

Prerequisites

Verify authentication and get your athlete ID:

curl -s "https://intervals.icu/api/v1/athlete/0/activities?oldest=2025-01-01&newest=2025-12-31" --header "Authorization: Bearer $(printenv INTERVALS_ICU_TOKEN)" | jq '.[0] | {icu_athlete_id}'

Save the icu_athlete_id value (e.g., i230851) for use in other endpoints that require an athlete ID.

Placeholders: Values in <angle-brackets> like <athlete-id> are placeholders. Replace them with actual values when executing.

How to Use

All examples below assume INTERVALS_ICU_TOKEN is set.

Base URL: https://intervals.icu

1. Get Athlete Profile

Get the authenticated athlete's profile and settings:

curl -s "https://intervals.icu/api/v1/athlete/0" --header "Authorization: Bearer $(printenv INTERVALS_ICU_TOKEN)" | jq '{id, name, firstname, lastname, email, locale, weight, icu_weight, icu_resting_hr, sex, country, city, timezone}'

2. List Activities

Get activities for a date range:

Note: Replace <athlete-id> with your athlete ID. Dates are in YYYY-MM-DD format.

curl -s "https://intervals.icu/api/v1/athlete/<athlete-id>/activities?oldest=2025-01-01&newest=2025-01-31" --header "Authorization: Bearer $(printenv INTERVALS_ICU_TOKEN)" | jq '.[] | {id, name, type, start_date_local, moving_time, distance, total_elevation_gain, icu_training_load}'

3. Get Activity Details

Get details for a specific activity:

Note: Replace <activity-id> with an actual activity ID from the "List Activities" output. Activities imported from Strava may have limited data.

curl -s "https://intervals.icu/api/v1/activity/<activity-id>" --header "Authorization: Bearer $(printenv INTERVALS_ICU_TOKEN)" | jq '{id, name, type, start_date_local, moving_time, distance, average_speed, average_watts, average_heartrate, icu_training_load}'

4. Get Activity Streams

Get detailed data streams (GPS, heart rate, power, etc.) for an activity:

Note: Replace <activity-id> with an actual activity ID. Available stream types: time, watts, heartrate, cadence, distance, altitude, latlng, velocity_smooth, temp. Only activities with recorded sensor data will have streams.

curl -s "https://intervals.icu/api/v1/activity/<activity-id>/streams?types=watts,heartrate,cadence" --header "Authorization: Bearer $(printenv INTERVALS_ICU_TOKEN)" | jq 'keys'

5. Get Activity Power Curve

Get the power curve for an activity:

Note: Replace <activity-id> with an actual activity ID. Only activities with power data will have a power curve.

curl -s "https://intervals.icu/api/v1/activity/<activity-id>/power-curve" --header "Authorization: Bearer $(printenv INTERVALS_ICU_TOKEN)" | jq '.[0:10]'

6. Get Wellness Data

Get wellness record for a specific date:

Note: Replace <athlete-id> with your athlete ID and <date> with YYYY-MM-DD.

curl -s "https://intervals.icu/api/v1/athlete/<athlete-id>/wellness/<date>" --header "Authorization: Bearer $(printenv INTERVALS_ICU_TOKEN)" | jq '{id, ctl, atl, rampRate, sleepTime, sleepScore, fatigue, soreness, stress, mood, motivation, weight, restingHR, hrv}'

7. Update Wellness Data

Update wellness record for a date:

Note: Replace <athlete-id> with your athlete ID and <date> with YYYY-MM-DD.

Write to /tmp/intervals_wellness.json:

{
  "weight": 72.5,
  "restingHR": 52
}

curl -s -X PUT "https://intervals.icu/api/v1/athlete/<athlete-id>/wellness/<date>" --header "Authorization: Bearer $(printenv INTERVALS_ICU_TOKEN)" --header "Content-Type: application/json" -d @/tmp/intervals_wellness.json | jq '{id, weight, restingHR}'

8. List Calendar Events

Get planned workouts and events for a date range:

Note: Replace <athlete-id> with your athlete ID.

curl -s "https://intervals.icu/api/v1/athlete/<athlete-id>/events?oldest=2025-01-01&newest=2025-12-31" --header "Authorization: Bearer $(printenv INTERVALS_ICU_TOKEN)" | jq '.[] | {id, start_date_local, name, category, type, description}'

9. Create Calendar Event

Create a planned workout or event:

Note: Replace <athlete-id> with your athlete ID. start_date_local must include a time component.

Write to /tmp/intervals_event.json:

{
  "category": "WORKOUT",
  "start_date_local": "2025-02-01T09:00:00",
  "name": "Easy Run",
  "description": "30 min easy run",
  "type": "Run"
}

curl -s -X POST "https://intervals.icu/api/v1/athlete/<athlete-id>/events" --header "Authorization: Bearer $(printenv INTERVALS_ICU_TOKEN)" --header "Content-Type: application/json" -d @/tmp/intervals_event.json | jq '{id, name, start_date_local, category, type}'

10. List Workouts

Get workouts from the workout library:

Note: Replace <athlete-id> with your athlete ID.

curl -s "https://intervals.icu/api/v1/athlete/<athlete-id>/workouts" --header "Authorization: Bearer $(printenv INTERVALS_ICU_TOKEN)" | jq '.[] | {id, name, type, description}' | head -40

11. Create Manual Activity

Create a manual activity entry:

Note: Replace <athlete-id> with your athlete ID. start_date_local must include a time component.

Write to /tmp/intervals_activity.json:

{
  "type": "Run",
  "name": "Morning Run",
  "start_date_local": "2025-02-01T07:00:00",
  "moving_time": 1800,
  "distance": 5000,
  "description": "Easy morning run"
}

curl -s -X POST "https://intervals.icu/api/v1/athlete/<athlete-id>/activities/manual" --header "Authorization: Bearer $(printenv INTERVALS_ICU_TOKEN)" --header "Content-Type: application/json" -d @/tmp/intervals_activity.json | jq '{id, name, type, start_date_local, moving_time, distance}'

12. Delete Activity

Delete an activity:

Note: Replace <activity-id> with the activity ID.

curl -s -X DELETE "https://intervals.icu/api/v1/activity/<activity-id>" --header "Authorization: Bearer $(printenv INTERVALS_ICU_TOKEN)" -w "\nHTTP Status: %{http_code}\n"

Guidelines

1. Athlete ID: Use 0 as a shortcut for the authenticated athlete in the /athlete/{id} endpoint only. For all other endpoints, use the actual athlete ID (e.g., i230851).
2. Date ranges: Most list endpoints require oldest and newest query parameters in YYYY-MM-DD format.
3. Datetime fields: When creating activities or events, start_date_local must include a time component (e.g., 2025-02-01T09:00:00), not just a date.
4. Rate limits: Be mindful of API rate limits. Avoid rapid successive calls.
5. Activity types: Common types include Ride, Run, Swim, WeightTraining, Yoga, Walk, Hike.
6. Strava activities: Activities imported from Strava may have limited data and show a note that they are not fully available via the API.