Noaa Spaceweather MCP Server

by cyanheads Your server? Claim it

answering

Noaa Spaceweather MCP Server is answering right now. Last checked 15 min ago. 215 installs a week from npm. It exposes 6 tools. Last commit 17 Sep 2026.

NOAA SWPC space weather: storm scales, Kp index, aurora forecasts, solar wind, activity, alerts.

Installs per day peak 170 · avg 20 · +659% w/w

a month agotoday

Uptime history 47 days of history · worst day 0%

47 days agonow

100.0%

Uptime 24h

91 of 91 checks

Tools

read from the server

386 ms

Response time

average over 24h

215

Installs / week

npm and PyPI

What changed 20

Every tool that appeared, vanished or quietly changed what it asks for. Recorded since 25 August 2026. No other catalogue keeps this.

17 Sep 6 tool descriptions were rewritten noaa_spaceweather_get_alerts, noaa_spaceweather_get_aurora_forecast, noaa_spaceweather_get_conditions and 3 more

17 Sep 4 tools changed the parameters they ask for noaa_spaceweather_get_alerts, noaa_spaceweather_get_conditions, noaa_spaceweather_get_solar_activity and 1 more

17 Sep a tool changed version2 times that day

16 Sep a tool changed version

25 Aug 6 tools changed the parameters they ask for noaa_spaceweather_get_alerts, noaa_spaceweather_get_aurora_forecast, noaa_spaceweather_get_conditions and 3 more

25 Aug a tool changed version

and 1 more, back to 25 August 2026

Nothing serious here today

Today is the operative word: we check Noaa Spaceweather MCP Server every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 15 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add noaa-spaceweather-mcp-server --transport http https://noaa-spaceweather.caseyjhand.com/mcp

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "noaa-spaceweather-mcp-server": {
      "url": "https://noaa-spaceweather.caseyjhand.com/mcp"
    }
  }
}

~/.codex/config.toml

[mcp_servers.noaa-spaceweather-mcp-server]
url = "https://noaa-spaceweather.caseyjhand.com/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "noaa-spaceweather-mcp-server": {
      "url": "https://noaa-spaceweather.caseyjhand.com/mcp"
    }
  }
}

.vscode/mcp.json

{
  "mcpServers": {
    "noaa-spaceweather-mcp-server": {
      "url": "https://noaa-spaceweather.caseyjhand.com/mcp"
    }
  }
}

This one needs environment variables set before it will start: MCP_HTTP_HOST (The hostname for the HTTP server.), MCP_HTTP_PORT (The port to run the HTTP server on.), MCP_HTTP_ENDPOINT_PATH (The endpoint path for the MCP server.), MCP_AUTH_MODE (Authentication mode to use: 'none', 'jwt', or 'oauth'.), MCP_LOG_LEVEL (Sets the minimum log level for output (e.g., 'debug', 'info', 'warn').). The author declared them in the registry entry; get the values from the project itself.

Available tools 6

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

noaa

noaa_spaceweather_get_alerts

Active SWPC alerts, watches, and warnings — parsed into structured records with product type, NOAA scale and level, issue time, serial number, validity window, and plain text. Covers geomagnetic storms, radio blackouts, and radiation storms. With active_only=false, also returns informational summaries, expired notices, and cancellations. max_age_hours controls how far back to look for candidates (default 48 h) — under active_only=true it does not cut off a product whose validity end is still in the future, and under active_only=false it is a literal age cutoff. The SWPC feed keeps all historical records and has no built-in expiry.

noaa_spaceweather_get_aurora_forecast

OVATION model aurora forecast for the next ~30–60 min: global grid of aurora probability percentages by latitude/longitude (1° resolution). With optional coordinates, returns the local aurora probability at the nearest grid point, the geomagnetic latitude those coordinates convert to, the minimum Kp and G level needed for aurora at that geomagnetic latitude, and a plain-language go/no-go verdict. Without coordinates, returns only global metadata. Data updates every ~5 minutes. Supply coordinates as geographic (WGS84); aurora bands are geomagnetic, and the tool converts between them.

noaa_spaceweather_get_conditions

Current space-weather snapshot: NOAA R/S/G storm scales (today + 3-day forecast), latest Kp index with its G-scale equivalent and aurora-visibility latitude, and a plain-language status summary. Optionally includes the SWPC forecast discussion explaining what is driving the forecast. The quickest way to answer "is anything happening right now?" — use before deciding whether to drill into solar wind (noaa_spaceweather_get_solar_wind), aurora (noaa_spaceweather_get_aurora_forecast), or alert details (noaa_spaceweather_get_alerts).

noaa_spaceweather_get_kp_index

Planetary K-index (0–9 geomagnetic activity scale) — recent observed 3-hour values with their NOAA G-scale equivalents and aurora-latitude guidance, plus the 3-day Kp forecast series. Kp is the primary driver of aurora visibility and geomagnetic storm severity. SWPC reports Kp in thirds and starts each G level at that level’s "minus" value: Kp 4.67 (5−) is G1, Kp 6.67 (7−) is G3 (aurora to ~50° geomagnetic), Kp 8.67 (9−) is still G4, and only Kp 9 is G5 extreme. Use noaa_spaceweather_get_conditions for a combined snapshot including storm scales; use this tool when you need the Kp time series or forecast detail.

noaa_spaceweather_get_solar_activity

Solar flare and radiation storm picture: discrete flare events from the past week with peak class and R-scale level, recent GOES X-ray flux with flare-class labels (A/B/C/M/X) and class magnitude, the daily F10.7 cm solar radio flux, 3-day flare-class probabilities (C/M/X), active solar regions with per-region flare probabilities, and GOES integral proton flux at ≥10 MeV with NOAA S-scale. For operators tracking HF radio blackout (R-scale, driven by X-ray) and radiation storm risk (S-scale, driven by protons). Active region data helps identify which region is driving current activity.

noaa_spaceweather_get_solar_wind

Real-time solar wind measurements from the active spacecraft at L1: proton speed (km/s), density (n/cm³), temperature (K), and the critical Bz component (southward Bz = negative = storm driver). Returns the recent plasma and magnetic field time series within the requested window, oldest first, each record tagged with the reporting spacecraft and bounded to 200 records per series unless resolution is set to "full". Bz < −10 nT for sustained periods is a primary geomagnetic storm trigger — use alongside noaa_spaceweather_get_kp_index to see whether elevated solar wind has translated into a geomagnetic storm.

Endpoints

URL	Transport	State	Latency	Checked
https://noaa-spaceweather.caseyjhand.com/mcp	streamable-http	answering	383 ms	15 min ago

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Noaa Spaceweather MCP Server — questions

Answers built from our own checks of this server.

What can Noaa Spaceweather MCP Server do?

It exposes 6 tools, read directly from the server on our last check. Among them: noaa_spaceweather_get_alerts, noaa_spaceweather_get_aurora_forecast, noaa_spaceweather_get_conditions, noaa_spaceweather_get_kp_index, noaa_spaceweather_get_solar_activity, noaa_spaceweather_get_solar_wind. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →

Is Noaa Spaceweather MCP Server working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 91 of 91 checks got a reply (100.0%), average response time 386 ms. The bar chart above shows every period we have measured.

How do I connect Noaa Spaceweather MCP Server?

Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.

Does Noaa Spaceweather MCP Server need an API key?

No. Noaa Spaceweather MCP Server completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 6 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is Noaa Spaceweather MCP Server?

It answers our handshake in 386 ms on average, which is faster than 39% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.

How many people use Noaa Spaceweather MCP Server?

The npm package @cyanheads/noaa-spaceweather-mcp-server was installed 215 times in the last week. Week over week that is +659%. We show installs rather than GitHub stars on purpose: a star is a bookmark, an install is someone actually running it.

Is Noaa Spaceweather MCP Server open source?

Yes — it is published under the Apache-2.0 licence, written in TypeScript, 2 stars on GitHub and 1 open issue. The source link is on this page, so you can read exactly what it does with your data before you connect it.