Space Weather · Data API

Space Weather Geomagnetic Activity

Live readings of how disturbed Earth's magnetic field is right now.

Minute-by-minute estimated planetary geomagnetic activity readings published by the United States space weather forecasting service. Each record is a timestamped disturbance level used to judge the severity of geomagnetic storms.

Get API key View docs

Source: NOAA Space Weather Prediction Center — Planetary K-index (1 minute) · Public domain (U.S. Government work) · Source: NOAA Space Weather Prediction Center

Endpoints

Every request is authenticated with your X-API-Key and counted against your plan.

GET /v1/data/space-weather-geomagnetic-activity
GET /v1/data/space-weather-geomagnetic-activity/search?q=...
GET /v1/data/space-weather-geomagnetic-activity/{key}

Base path /v1/data/space-weather-geomagnetic-activity · full reference in the interactive docs. Also exposed as an MCP tool for AI agents.

Fields

Field	Type	Description
observed_at	date	UTC timestamp of the reading
geomagnetic_index	float	Estimated planetary geomagnetic disturbance index, 0 to 9
estimated_index	float	Estimated index value as published by the forecast centre
index_label	str	Text form of the index, including plus or minus qualifiers

What you get

Minute-resolution readings of planetary geomagnetic activity

Rolling recent window kept continuously up to date

Simple numeric index that maps to standard storm levels

Timestamp range filtering for incident review

Public domain source with no usage restrictions

FAQ

What do the index numbers mean?: The scale runs 0 to 9; values of 5 and above correspond to geomagnetic storm conditions.
How often does it update?: The source publishes estimated values at one-minute cadence.
Is this a forecast?: No, these are estimated observed conditions rather than a prediction.

Pricing

Simple, transparent pricing

Start free, upgrade when you need more. All plans include full API access.

Free

$0forever

Get started and explore the API

100 requests/day

100 API requests per day
All endpoints included
Community support

Get Started

Pro

$9/month

For production apps and AI agents

10,000 requests/day

10,000 API requests per day
All endpoints included
Priority support
Usage dashboard

Upgrade to Pro

Enterprise

$49/month

Unlimited access for high-volume use

Unlimited requests

Unlimited API requests
All endpoints included
Priority support
Usage dashboard
Dedicated support channel

Go Enterprise

Getting Started

Start building in minutes

Register

Create an account to get your API key. It's free — no credit card required.

curl -X POST https://api.aristocles.com.au/v1/auth/register \
  -H "Content-Type: application/json" \
  -d '{"email": "you@example.com", "name": "Your Name"}'

Make a request

Use your API key in the X-API-Key header to authenticate requests.

curl https://api.aristocles.com.au/v1/data/asx \
  -H "X-API-Key: your_api_key_here"

Upgrade

Need more requests? Upgrade to Pro or Enterprise — you'll be redirected to Stripe Checkout.

curl -X POST "https://api.aristocles.com.au/v1/billing/checkout?tier=pro" \
  -H "X-API-Key: your_api_key_here"

Check usage

Monitor your daily request count and remaining quota at any time.

curl https://api.aristocles.com.au/v1/usage \
  -H "X-API-Key: your_api_key_here"