Space-weather forecast — normalized one-to-three-day NOAA SWPC geomagnetic Kp-index period
Space-weather forecast — normalized one-to-three-day NOAA SWPC geomagnetic Kp-index periods labeled observed, estimated, or predicted.
5000 (raw units)
price
4
calls / 30d
3
unique payers
2026-09-15
updated
Provider
space-weather.use.x402atlas.com · discovered, not yet claimed by its owner
Payment (x402 accepts[])
[
{
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"network": "eip155:8453",
"payTo": "0x8C128f1Ee62Bb5e47867CfbAe2ad89be325Df1b2",
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"amount": "5000",
"maxTimeoutSeconds": 300
},
{
"scheme": "exact",
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"asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
"amount": "5000",
"maxTimeoutSeconds": 300
}
]Output schema
{
"bazaar": {
"category": "science",
"info": {
"input": {
"method": "GET",
"queryParams": {
"days": 3
},
"type": "http"
},
"output": {
"example": {
"issued_at": null,
"operation": "kp-forecast",
"periods": [
{
"kind": "predicted",
"kp": 5,
"noaa_scale": "G1",
"valid_at": "2026-08-04T18:00:00Z"
},
{
"kind": "predicted",
"kp": 4.67,
"noaa_scale": null,
"valid_at": "2026-08-04T21:00:00Z"
},
{
"kind": "estimated",
"kp": 3,
"noaa_scale": null,
"valid_at": "2026-08-05T00:00:00Z"
}
],
"query": {
"days": 3
},
"schema_version": "noaa-swpc-normalized-v1",
"source": {
"name": "NOAA Space Weather Prediction Center",
"products": [
"noaa_planetary_k_index_forecast"
],
"retrieved_at": "2026-08-04T15:47:00Z"
},
"source_age_seconds": 0,
"stale": false,
"warnings": [
"NOAA SWPC does not publish an issuance timestamp for this product; issued_at is null and retrieved_at is not an issuance time.",
"Missing forecast periods are not filled."
]
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"additionalProperties": false,
"properties": {
"days": {
"default": 3,
"description": "Number of 24-hour periods from retrieval time",
"maximum": 3,
"minimum": 1,
"type": "integer"
}
},
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"additionalProperties": false,
"properties": {
"_atlas": {
"additionalProperties": false,
"description": "Atlas documentation and related-route metadata added after deployment",
"properties": {
"docs": {
"description": "Documentation URL for this bridge",
"format": "uri",
"maxLength": 512,
"type": "string"
},
"related": {
"description": "Bounded related Atlas routes",
"items": {
"additionalProperties": false,
"description": "One related Atlas route",
"properties": {
"bridge": {
"description": "Related bridge name",
"maxLength": 64,
"type": "string"
},
"docs": {
"description": "Related bridge documentation URL",
"format": "uri",
"maxLength": 512,
"type": "string"
},
"summary": {
"description": "Short capability summary",
"maxLength": 256,
"type": "string"
},
"url": {
"description": "Related route URL",
"format": "uri",
"maxLength": 512,
"type": "string"
}
},
"required": [
"bridge",
"url",
"docs",
"summary"
],
"type": "object"
},
"maxItems": 3,
"type": "array"
}
},
"required": [
"docs"
],
"type": "object"
},
"issued_at": {
"description": "Always null because this source publishes no issuance timestamp",
"format": "date-time",
"type": [
"string",
"null"
]
},
"operation": {
"const": "kp-forecast",
"description": "Stable route operation",
"type": "string"
},
"periods": {
"description": "Unique periods in ascending valid-time order; missing periods are not filled",
"items": {
"additionalProperties": false,
"properties": {
"kind": {
"description": "Exact normalized source observed classification",
"enum": [
"observed",
"estimated",
"predicted"
],
"type": "string"
},
"kp": {
"description": "Forecast planetary K index",
"maximum": 9,
"minimum": 0,
"type": "number"
},
"noaa_scale": {
"description": "Official NOAA scale value when supplied",
"type": [
"string",
"null"
]
},
"valid_at": {
"description": "Official period valid time",
"format": "date-time",
"type": "string"
}
},
"required": [
"valid_at",
"kp",
"noaa_scale",
"kind"
],
"type": "object"
},
"type": "array"
},
"query": {
"additionalProperties": false,
"description": "Normalized query identity after applying the default day window",
"properties": {
"days": {
"description": "Applied forecast-day window",
"maximum": 3,
"minimum": 1,
"type": "integer"
}
},
"required": [
"days"
],
"type": "object"
},
"schema_version": {
"const": "noaa-swpc-normalized-v1",
"description": "Pinned NOAA SWPC normalization contract",
"type": "string"
},
"source": {
"additionalProperties": false,
"description": "Official NOAA SWPC provenance for the served normalized snapshot",
"properties": {
"name": {
"description": "Official source organization",
"type": "string"
},
"products": {
"description": "Fixed normalized NOAA SWPC products",
"items": {
"description": "Product identifier",
"type": "string"
},
"type": "array"
},
"retrieved_at": {
"description": "Time the served normalized snapshot was retrieved",
"format": "date-time",
"type": "string"
}
},
"required": [
"name",
"products",
"retrieved_at"
],
"type": "object"
},
"source_age_seconds": {
"description": "Age in whole seconds of the route's controlling freshness timestamp; retrieval time controls alerts and forecast",
"minimum": 0,
"type": "integer"
},
"stale": {
"description": "True only when a validated cached snapshot was used",
"type": "boolean"
},
"warnings": {
"description": "Freshness, missing-component, provenance, and interpretation limitations",
"items": {
"description": "Actionable warning",
"type": "string"
},
"type": "array"
}
},
"required": [
"operation",
"schema_version",
"query",
"issued_at",
"periods",
"source",
"stale",
"source_age_seconds",
"warnings"
],
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
},
"tags": [
"space-weather-forecast",
"kp-index-forecast",
"space-weather",
"geomagnetic",
"noaa-swpc"
]
}
}Use it
curl
curl "https://space-weather.use.x402atlas.com/forecast" # -> 402 Payment Required, accepts[] lists how to pay # retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid
JavaScript
const res = await fetch("https://space-weather.use.x402atlas.com/forecast");
if (res.status === 402) {
const { accepts } = await res.json();
// pay one of accepts[] via an x402 client, then retry with the payment header
}Python
import httpx
res = httpx.get("https://space-weather.use.x402atlas.com/forecast")
if res.status_code == 402:
accepts = res.json()["accepts"]
# pay one of accepts[] via an x402 client, then retry with the payment headerMachine-readable
Everything on this page is also available as clean JSON at /resources/1218.json, and this resource appears in /discovery/resources and /discovery/search.