Planetary Geomagnetic Kp Index, 3-Hourly (GFZ Potsdam)

gfzkpindex/kp-index

The planetary Kp index of geomagnetic activity from GFZ Potsdam, one value (0 to 9) per 3-hour UTC interval over a time range you give, each with a status of pre (preliminary nowcast) or def (definitive). Use it to see how disturbed Earth's magnetic field was or is, for aurora and storm questions. An interval with no data is absent. GFZ data under CC BY 4.0, passed through unmodified and served by Eden Engine; not an official GFZ product.

activeper callv1

Price

$0.0026 per call

You pay the price shown. If a call turns out to cost more than its quote, you pay the actual price, capped at twice the quote. No monthly minimum. Top-ups start at $5.

Data source

GFZ German Research Centre for Geosciences

Data from the GFZ German Research Centre for Geosciences (GFZ Helmholtz Centre Potsdam), kp.gfz.de, licensed CC BY 4.0; cite Matzka et al. (2021). Served by Eden Engine; not an official GFZ product.

Use it

Five steps: search, inspect, learn, run, settle. No per-tool setup; your agent reaches this tool through the meta-tools it already has.

Connect once and your AI can find and run this tool, and any other it needs.

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agent

// 1. search: find the tool
omnial_search({ query: "what you need" })

// 2. inspect: price and input schema
omnial_inspect({ tool: "gfzkpindex/kp-index" })

// 3. learn: read the usage guide at runtime
omnial_learn({ tool: "gfzkpindex/kp-index" })

// 4. run: price the exact call first, then run it
omnial_execute({ tool: "gfzkpindex/kp-index", input: { /* see input_schema */ }, dry_run: true })
omnial_execute({ tool: "gfzkpindex/kp-index", input: { /* ... */ } })

// 5. settle: the call is charged when it finishes, nothing to do

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Pricing

Every charge this tool can incur.

Charge	Price
Per call	$0.0026

Updated: Oct 21, 2026

Input and output schemas

Input schema

input_schema.json

{
  "type": "object",
  "required": [
    "start",
    "end"
  ],
  "properties": {
    "end": {
      "type": "string",
      "pattern": "^[0-9]{4}-[0-9]{2}-[0-9]{2}T[0-9]{2}:[0-9]{2}:[0-9]{2}Z$",
      "description": "End of the range, UTC, in the form 2026-10-18T00:00:00Z."
    },
    "start": {
      "type": "string",
      "pattern": "^[0-9]{4}-[0-9]{2}-[0-9]{2}T[0-9]{2}:[0-9]{2}:[0-9]{2}Z$",
      "description": "Start of the range, UTC, in the form 2026-10-17T00:00:00Z."
    }
  },
  "additionalProperties": false
}

Output schema

output_schema.json

{
  "type": "object",
  "required": [
    "datetime",
    "Kp"
  ],
  "properties": {
    "Kp": {
      "type": "array",
      "items": {
        "type": "number"
      },
      "description": "Kp values, 0 to 9 in thirds (for example 1.333), one per 3-hour interval."
    },
    "meta": {
      "type": "object",
      "description": "The service's licence and source (CC BY 4.0, GFZ Potsdam).",
      "additionalProperties": true
    },
    "status": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "description": "Per value: pre (preliminary, nowcast) or def (definitive)."
    },
    "datetime": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "description": "UTC start time of each 3-hour interval; same length and order as the values."
    }
  },
  "additionalProperties": true
}