Recent solar flare events (GOES X-ray, C/M/X class) API

Recent solar flare EVENTS from NOAA SWPC GOES X-ray sensors over the last 7 days: each flare's begin/peak/end time and GOES class (C/M/X), plus the current long-channel X-ray flux mapped to a live flare class, the strongest recent class, and a derived activity verdict (radio-blackout / radiation-storm risk). Distinct from the current-Kp space-weather endpoint — this is the flare/X-ray dataset. Answers 'were there any M- or X-class flares recently?', 'current X-ray flux level?', 'is solar flare activity elevated right now?'.

Price$0.01per request

MethodPOST

Route/v1/science/solar-flares

StatusLive

MIME typeapplication/json

Rate limit60/minute

Cache1800s public

sciencespace-weathersolar-flarex-raygoesnoaaswpcradio-blackoutsolar-activity

API URLhttps://x402.hexl.dev/v1/science/solar-flares

Integration docs

Example request

{
  "limit": 5
}

Example response

{
  "observedAt": "2026-06-05T00:21:00Z",
  "count": 5,
  "strongestClass": "C1.8",
  "currentLongFluxWm2": 0.0000010648307124938583,
  "currentClass": "C1.1",
  "activityVerdict": "Low flare activity (C-class) — minimal impact.",
  "flares": [
    {
      "class": "C1.5",
      "beginTime": "2026-06-04T23:37:00Z",
      "peakTime": "2026-06-04T23:42:00Z",
      "endTime": "2026-06-04T23:45:00Z",
      "peakLongFluxWm2": 0.0000015496697187700192
    },
    {
      "class": "C1.8",
      "beginTime": "2026-06-04T16:25:00Z",
      "peakTime": "2026-06-04T16:35:00Z",
      "endTime": "2026-06-04T16:44:00Z",
      "peakLongFluxWm2": 0.0000018243227941638906
    },
    {
      "class": "C1.6",
      "beginTime": "2026-06-04T15:53:00Z",
      "peakTime": "2026-06-04T15:58:00Z",
      "endTime": "2026-06-04T16:06:00Z",
      "peakLongFluxWm2": 0.000001655140408729494
    },
    {
      "class": "C1.5",
      "beginTime": "2026-06-04T12:50:00Z",
      "peakTime": "2026-06-04T12:58:00Z",
      "endTime": "2026-06-04T13:09:00Z",
      "peakLongFluxWm2": 0.00000158810712491686
    },
    {
      "class": "C1.5",
      "beginTime": "2026-06-04T06:31:00Z",
      "peakTime": "2026-06-04T06:38:00Z",
      "endTime": "2026-06-04T06:40:00Z",
      "peakLongFluxWm2": 0.0000015790179759278544
    }
  ]
}

Input schema

{
  "type": "object",
  "properties": {
    "limit": {
      "type": "integer",
      "minimum": 1,
      "maximum": 50,
      "default": 15,
      "description": "Max flare events to return."
    }
  },
  "additionalProperties": false
}

Output schema

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