`donki_cme`

Pack: nasa · Endpoint: https://gateway.pipeworx.io/nasa/mcp

No MCP client? Call it directly: GET https://gateway.pipeworx.io/v1/tools/donki_cme for the schema, then POST the same URL with its arguments for the data.

“Was there a coronal mass ejection this week?” / “is a CME heading for Earth?” — coronal mass ejections catalogued by NASA DONKI, the space-weather event database run by NASA’s Community Coordinated Modeling Center. AUTHORITATIVE for CME occurrence and geometry: returns each eruption’s start time, the instruments that saw it, the analysts’ note describing the source region, and for analysed events the modelled speed in km/s, the direction (latitude/longitude on the solar disk), half-angle width and whether the analysis is the most accurate available. A CME is the thing that causes an aurora or a satellite drag event two or three days later, so speed plus direction is what says whether it will reach Earth.

Parameters

Name	Type	Required	Description
`start_date`	string	no	Start date YYYY-MM-DD (optional; DONKI defaults to ~30 days ago).
`end_date`	string	no	End date YYYY-MM-DD (optional; defaults to today).
`min_speed_km_s`	number	no	Only return CMEs whose best analysis measured at least this speed in km/s. ~500 is fast, ~1000+ is a major event.
`limit`	number	no	Max events to return (default 50, max 200).
`_apiKey`	string	no	NASA API key (optional, defaults to DEMO_KEY)

Example call

Arguments

{
  "start_date": "2026-09-01",
  "end_date": "2026-09-17",
  "limit": 3
}

curl

curl -X POST https://gateway.pipeworx.io/nasa/mcp \
  -H 'Content-Type: application/json' \
  -d '{"jsonrpc":"2.0","id":1,"method":"tools/call","params":{"name":"donki_cme","arguments":{"start_date":"2026-09-01","end_date":"2026-09-17","limit":3}}}'

TypeScript (@pipeworx/sdk)

import { Pipeworx } from '@pipeworx/sdk';
const pipeworx = new Pipeworx();

const result = await pipeworx.call('donki_cme', {
  "start_date": "2026-09-01",
  "end_date": "2026-09-17",
  "limit": 3
});

More examples

{
  "start_date": "2026-08-15",
  "end_date": "2026-09-17",
  "min_speed_km_s": 800
}

Connect

Add this to your MCP client config, or use one-click install buttons:

{
  "mcpServers": {
    "nasa": {
      "url": "https://gateway.pipeworx.io/nasa/mcp"
    }
  }
}

See Getting Started for client-specific install steps.

donki_cme