# io.github.cyanheads/aviation-weather-mcp-server

> METARs, TAFs, PIREPs, domestic/international SIGMETs and CWAs via NWS AWC. AIRMETs not served.

- name: io.github.cyanheads/aviation-weather-mcp-server
- version: 0.6.0
- connection class: R0 (autonomous)
- trust: 94/100
- quality: 73/100 (needs work)
- owner: not claimed
- descriptor: https://api.protogrid.dev/v1/servers/io.github.cyanheads%2Faviation-weather-mcp-server
- tools: https://api.protogrid.dev/v1/servers/io.github.cyanheads%2Faviation-weather-mcp-server/tools

**An agent can connect right now, no human step.** Remote endpoint, no authentication, reachable on the last probe.

## Connection (mcpServers)

```json
{
  "mcpServers": {
    "aviation-weather-mcp-server": {
      "type": "http",
      "url": "https://aviation-weather.caseyjhand.com/mcp"
    }
  }
}
```


## Trust

- hygiene: 100
- liveness: 100
- freshness: 100
- provenance: 80
- drivers: +repository +namespace-matches-repo +reachable +uptime-100% +updated-2d-ago
- Derived from observable signals (official registry feed and our own credential-free probes); no code audit performed.

## Quality 73/100 (needs work)

### protocol: 88 (weight 25)

- pass `protocol.modern`: supports 2026-07-28 (server/discover)
- pass `protocol.stateless`: answers without a session
- pass `protocol.transport`: streamable HTTP
- warn `protocol.list_ttl`: tools/list declares ttlMs 0, so clients re-fetch it on every use

### authorization: n/a (weight 15)

- n/a `auth.prm`, `auth.as_metadata`, `auth.cimd`: no remote uses OAuth
- n/a `auth.secret_in_url`: no templated URL

### tool hygiene: 86 (weight 30)

- pass `tools.descriptions`: every tool has a description
- pass `tools.description_length`: descriptions are concise
- pass `tools.schemas`: every tool has an object input schema
- pass `tools.annotations`: 5 of 5 tools declare readOnlyHint or destructiveHint
- fail `tools.directory_hints`: no tool declares all four of readOnlyHint, destructiveHint, idempotentHint and openWorldHint; missing: aviation_get_advisories (destructiveHint); aviation_get_pireps (destructiveHint); aviation_find_stations (destructiveHint); …
- pass `tools.token_cost`: about 3,866 tokens to load every tool
- pass `tools.api_dump`: tools are not a one-to-one API dump

### stability: 25 (weight 15)

- warn `stability.changes`: 7 tool changes in 30 days
- fail `stability.rug_pull`: 1 tools kept their name but changed most of their description in 30 days; review before trusting them

### dependencies: n/a (weight 15)

- n/a `deps.known_vulns`, `deps.mcp_sdk_version`, `deps.resolvable`: deps.dev does not know @cyanheads/aviation-weather-mcp-server@0.6.0, @cyanheads/aviation-weather-mcp-server@0.6.0

- tools: 5, about 3,866 tokens to load them all
- tool set hash: 1e80a5a008f95c0679d1b4bae5663540
- tools last changed: 2026-10-19T06:36:25.856Z
- badge: [![protogrid quality](https://protogrid.dev/badge/io.github.cyanheads/aviation-weather-mcp-server.svg)](https://protogrid.dev/servers/io.github.cyanheads/aviation-weather-mcp-server)
- Checks run on what our credential-free, read-only probes observe; tools are never called and no code audit is performed.

### Tool changes

- 2026-10-19 `aviation_get_advisories` changed (title, description, inputSchema, outputSchema) **meaning changed**
  - before: Get active domestic SIGMETs for a region. Returns each advisory with hazard type (CONVECTIVE, TURBULENCE, ICING, IFR), severity, altitude range, valid period, polygon coordinates, and raw text. Coverage is US-centric (NWS Aviation Weather Center). This tool reads the domestic SIGMET feed only and cannot return an AIRMET; requests for one are rejected rather than answered with SIGMETs. During fair-weather periods no advisories may be active — an empty result is normal, not an error. Filter by advisory_type, hazard, or bbox.
  - after: Get active domestic SIGMETs, international SIGMETs (including oceanic products), and Center Weather Advisories from the NWS Aviation Weather Center. Filter by advisory_type, hazard, or ordered bbox. Returns source coverage, decoded hazards/altitudes/movement, multipart geometry, and original bulletins; missing facts stay null. Independent source failures retain healthy results with partial coverage. AIRMET requests are rejected; this tool does not retrieve AIRMETs. Omit limit to return every available match; an explicit limit sorts results and discloses withheld matches.
- 2026-10-19 `aviation_get_pireps` changed (inputSchema)
- 2026-10-19 `aviation_get_taf` changed (inputSchema)
- 2026-10-19 `aviation_get_metar` changed (inputSchema)
- 2026-09-24 `aviation_get_pireps` changed (description, outputSchema)
  - before: Get recent Pilot Reports (PIREPs) near an airport or within a bounding box. Returns decoded turbulence, icing, and cloud reports with altitude, aircraft type, intensity, and the raw PIREP string. Requires either station_id (ICAO center point for radial search, e.g., KSEA) or bbox (area search) — not both. distance_nm belongs to the station_id search only, and altitude_min_ft must not exceed altitude_max_ft. min_intensity restricts the result to reports carrying a turbulence or icing layer at that intensity or above. limit bounds how many reports come back without changing what is searched, keeping the most recent. Coverage is US-centric; PIREPs are sparse and absence of reports does not imply smooth conditions.
  - after: Get recent Pilot Reports (PIREPs) near an airport or within a bounding box. Returns decoded turbulence, icing, and cloud reports with altitude, aircraft type, intensity, outside air temperature, wind aloft, flight weather, and the raw PIREP string. Requires either station_id (ICAO center point for radial search, e.g., KSEA) or bbox (area search) — not both. distance_nm belongs to the station_id search only, and altitude_min_ft must not exceed altitude_max_ft. min_intensity restricts the result to reports carrying a turbulence or icing layer at that intensity or above. limit bounds how many reports come back without changing what is searched, keeping the most recent. Coverage is US-centric; PIREPs are sparse and absence of reports does not imply smooth conditions.
- 2026-09-24 `aviation_get_metar` changed (description, inputSchema, outputSchema)
  - before: Get current weather observations (METARs) for named airports, or survey every reporting station inside a geographic area. Returns decoded fields — wind direction/speed/gusts, visibility, ceiling with its kind (measured, or indefinite for vertical visibility into an obscuration), present weather, temperature, dewpoint, altimeter, cloud layers — plus the computed flight category (VFR/MVFR/IFR/LIFR) and the raw METAR string. Requires either station_ids (1–10 ICAO IDs, e.g., KSEA, KJFK, K0S9) or bbox (area survey) — not both. station_ids returns every observation inside the hours window; bbox returns the latest observation per station in the box, with limit bounding how many stations come back. Use aviation_find_stations to resolve or verify an ICAO ID, or to discover nearby stations.
  - after: Get current weather observations (METARs) for named airports, or survey every reporting station inside a geographic area. Returns decoded fields — wind direction/speed/gusts, visibility, ceiling with its kind (measured, or indefinite for vertical visibility into an obscuration), present weather, temperature, dewpoint, altimeter, cloud layers — plus the computed flight category (VFR/MVFR/IFR/LIFR) and the raw METAR string. Requires either station_ids (1–10 ICAO IDs, e.g., KSEA, KJFK, K0S9) or bbox (area survey) — not both. station_ids returns every observation inside the hours window; bbox returns the latest observation per station in the box, with flight_category keeping only the stations in the categories named (e.g., IFR and LIFR) and limit bounding how many stations come back. Use aviation_find_stations to resolve or verify an ICAO ID, or to discover nearby stations.
- 2026-09-24 `aviation_find_stations` changed (outputSchema)

Full history: https://api.protogrid.dev/v1/servers/io.github.cyanheads%2Faviation-weather-mcp-server/changes

## Dependencies

- npm @cyanheads/aviation-weather-mcp-server@0.6.0: unknown
- npm @cyanheads/aviation-weather-mcp-server@0.6.0: unknown

Dependency graphs from deps.dev; advisories from OSV.dev, including the GitHub Advisory Database and the PyPI Advisory Database; all CC BY 4.0.

## Remotes

- https://aviation-weather.caseyjhand.com/mcp (streamable-http, auth none, reachable true, uptime30d 1)

## Packages

- npm @cyanheads/aviation-weather-mcp-server@0.6.0
- npm @cyanheads/aviation-weather-mcp-server@0.6.0

## Tools (5)

- `aviation_find_stations`: Resolve an airport or weather reporting station by its identifier, or discover stations within a bounding box or US state. Returns all identifier variants (ICAO/IATA/FAA), coordinates, elevation, and available data types (METAR, TAF, SYNOP, etc.). A lookup matches the registry's own identifier, which for an airport is its 4-character ICAO ID (e.g., KSEA, KJFK, K0S9); buoys and mesonet sites carry identifiers of other shapes and resolve by those. At least one of station_ids, bbox, or state is required. limit bounds how many stations an area search returns without changing the area searched, and belongs to the bbox and state modes only.
- `aviation_get_advisories`: Get active domestic SIGMETs, international SIGMETs (including oceanic products), and Center Weather Advisories from the NWS Aviation Weather Center. Filter by advisory_type, hazard, or ordered bbox. Returns source coverage, decoded hazards/altitudes/movement, multipart geometry, and original bulletins; missing facts stay null. Independent source failures retain healthy results with partial coverage. AIRMET requests are rejected; this tool does not retrieve AIRMETs. Omit limit to return every available match; an explicit limit sorts results and discloses withheld matches.
- `aviation_get_metar`: Get current weather observations (METARs) for named airports, or survey every reporting station inside a geographic area. Returns decoded fields — wind direction/speed/gusts, visibility, ceiling with its kind (measured, or indefinite for vertical visibility into an obscuration), present weather, temperature, dewpoint, altimeter, cloud layers — plus the computed flight category (VFR/MVFR/IFR/LIFR) and the raw METAR string. Requires either station_ids (1–10 ICAO IDs, e.g., KSEA, KJFK, K0S9) or bbox (area survey) — not both. station_ids returns every observation inside the hours window; bbox returns the latest observation per station in the box, with flight_category keeping only the stations in the categories named (e.g., IFR and LIFR) and limit bounding how many stations come back. Use aviation_find_stations to resolve or verify an ICAO ID, or to discover nearby stations.
- `aviation_get_pireps`: Get recent Pilot Reports (PIREPs) near an airport or within a bounding box. Returns decoded turbulence, icing, and cloud reports with altitude, aircraft type, intensity, outside air temperature, wind aloft, flight weather, and the raw PIREP string. Requires either station_id (ICAO center point for radial search, e.g., KSEA) or bbox (area search) — not both. distance_nm belongs to the station_id search only, and altitude_min_ft must not exceed altitude_max_ft. min_intensity restricts the result to reports carrying a turbulence or icing layer at that intensity or above. limit bounds how many reports come back without changing what is searched, keeping the most recent. Coverage is US-centric; PIREPs are sparse and absence of reports does not imply smooth conditions.
- `aviation_get_taf`: Get the Terminal Aerodrome Forecast (TAF) for one or more airports. Returns each forecast period with valid times, surface wind, low-level wind shear, visibility, decoded weather conditions, cloud layers, and the vertical visibility into a forecast obscuration, plus the raw TAF string. TAFs cover the next 24–30 hours and are issued only for airports with scheduled commercial service; check data_types from aviation_find_stations to confirm TAF availability. Accepts 1–4 ICAO station IDs (e.g., KSEA, KJFK, K36U).