Geomagnetic Kp & aurora visibility API

Read NOAA SWPC (keyless) for the latest planetary Kp index and solar-wind speed, then derive the geomagnetic storm level (G0-G5) and an aurora-visibility verdict including the approximate equatorward latitude where aurora may be seen. The value-add is the aurora-visibility derivation from raw Kp. Differs from science-space (ISS/asteroids/launches). Answers 'is there an aurora tonight', 'current Kp index', 'geomagnetic storm level', 'how far south can aurora be seen'.

Price$0.01per request

MethodPOST

Route/v1/science/space-weather

StatusLive

MIME typeapplication/json

Rate limit60/minute

Cache3600s public

sciencespace-weatheraurorakpgeomagneticnoaasolar-windstorm

API URLhttps://x402.hexl.dev/v1/science/space-weather

Integration docs

Example request

{}

Example response

{
  "observedAt": "2026-06-03 12:00:00",
  "kpIndex": 5,
  "stormLevel": "G1 (minor)",
  "solarWindSpeedKmS": 600,
  "auroraVisibleLatitudeDeg": 56,
  "auroraVerdict": "Aurora possible at high latitudes — minor storm under way."
}

Input schema

{
  "type": "object",
  "additionalProperties": false,
  "properties": {}
}

Output schema

{
  "type": "object",
  "additionalProperties": true
}