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WeatherMCP serverFirst audited Nov 13, 2026

io.github.cyanheads/noaa-spaceweather-mcp-server

NOAA SWPC space weather: storm scales, Kp index, aurora forecasts, solar wind, activity, alerts.The vendor's description, from its MCP Registry listing.

Passed public checksAudited Nov 13, 2026

Every public check ran and passed. Public audit: we connect as an AI client would, list the tools and check what they say. We do not run them. How we audit

Does it work?
YesConnected in 406 ms.
Sign-up?
None neededIt answered without any account or key.
Can it change things?
No, read-onlyAll 6 tools say they only read.
Endpointhttps://noaa-spaceweather.caseyjhand.com/mcp

Source code Streamable HTTP · protocol 2025-11-25 · server version 0.4.0

What we checked, the evidence, and the tools it offers.

What we checked

Security

  • Passed: Connections are encrypted (HTTPS).

  • Passed: No hidden instructions found in tool text.

Safety labels

  • Passed: Every tool says whether it only reads or can change things.

Tools

  • Passed: 6 tools listed.

  • Passed: Every tool describes its inputs with a valid schema.

Protocol

  • Passed: The MCP handshake works (Streamable HTTP).

  • Passed: Protocol version 2025-11-25 (latest).

  • Passed: Unknown requests are refused.

Connection

  • Passed: The server responds.

Tools (6)

As the server describes them. The labels are the server's own: it says whether each tool only reads or can change things.

  • noaa_spaceweather_get_conditionsCurrent space-weather snapshot: NOAA R/S/G storm scales (the previous UTC day, today, and the 3-day forecast), latest Kp index with its G-scale equivalent and aurora-visibility latitude, and a plain-…Read-only
  • noaa_spaceweather_get_alertsActive 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 stor…Read-only
  • noaa_spaceweather_get_kp_indexPlanetary 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 prima…Read-only
  • noaa_spaceweather_get_solar_windReal-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). Retu…Read-only
  • noaa_spaceweather_get_solar_activitySolar 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, th…Read-only
  • noaa_spaceweather_get_aurora_forecastOVATION model aurora forecast for the next ~30–90 min: global grid of aurora probability percentages by latitude/longitude (1° resolution). With optional coordinates, returns the local aurora probabi…Read-only

Audit history

  1. Nov 13Passed

What we sent

Every request in this audit, with the answer and how long it took. We never send credentials and never call a tool.

RequestAnswerTime
initializeHTTP 200406 ms
initializedHTTP 202285 ms
tools/listHTTP 200121 ms
resources/listHTTP 20094 ms
prompts/listHTTP 200105 ms
unknown-methodHTTP 20092 ms

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