# io.github.cyanheads/aviation-weather-mcp-server (remote · aviation-weather.caseyjhand.com)

Fetch METARs, TAFs, PIREPs, and SIGMETs/AIRMETs from the NWS Aviation Weather Center.

- Trust score: 71/100 (medium)
- Change this week: +5
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-08-03

## Components

- remote · `aviation-weather.caseyjhand.com`: 71/100 (this document), [markdown](https://verifymcp.io/servers/cyanheads-aviation-weather-mcp-server/aviation-weather.md), [page](https://verifymcp.io/servers/cyanheads-aviation-weather-mcp-server/aviation-weather)
- npm · `@cyanheads/aviation-weather-mcp-server`: 35/100, [markdown](https://verifymcp.io/servers/cyanheads-aviation-weather-mcp-server/cyanheads-aviation-weather-mcp-server.md), [page](https://verifymcp.io/servers/cyanheads-aviation-weather-mcp-server/cyanheads-aviation-weather-mcp-server)

## Channel facts

- Endpoint: `https://aviation-weather.caseyjhand.com/mcp`
- Transports: `streamable-http`
- Auth: `none`
- Version: `0.1.8`

## Trust breakdown

How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. Scores are 0–100 per category. Scoring method: https://verifymcp.io/docs/scoring (what has changed: https://verifymcp.io/docs/scoring/changelog)

Scored 2026-08-03.

- **Endpoint Security**: 66/100
  - The endpoint's TLS certificate is valid, in date, and uses a strong key.
  - Authorisation not fully verified: no authorisation is required to call this server, and 5 tool(s) never declared a destructiveHint. The MCP spec treats an absent hint as destructive by default, so we cannot call this surface safe.
  - HTTPS is enforced; there's no plaintext access path.
  - The HSTS (Strict-Transport-Security) header is present.
  - DNSSEC is configured correctly; the domain's records validate against the full chain to the root.
- **Transport & Reachability**: 100/100
  - Verified streamable-http transport via a live MCP handshake.
- **Schema Quality & AI Usability**: 77/100
  - 100% of prompts and resources have a non-trivial description (not blank, and not just the item's name).
  - AI-judged instruction clarity (excellent).
  - Context-footprint check failed: tool/resource definitions use about 1166 tokens (~233/item across 5 items; 5 tools + 0 resources), over budget; trim descriptions and params.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 27/100
  - Stability observed for 8 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 100/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 100% of tool parameters carry a description.
  - Structured output schemas are declared (100% of tools); any adoption earns full credit.
- **Capabilities**: 100/100
  - Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.

## Install

### Claude

```bash
claude mcp add --transport http cyanheads-aviation-weather-mcp-server https://aviation-weather.caseyjhand.com/mcp
```

### Codex

```toml
[mcp_servers.cyanheads-aviation-weather-mcp-server]
url = "https://aviation-weather.caseyjhand.com/mcp"
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "cyanheads-aviation-weather-mcp-server": {
      "type": "remote",
      "url": "https://aviation-weather.caseyjhand.com/mcp",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add cyanheads-aviation-weather-mcp-server --url https://aviation-weather.caseyjhand.com/mcp --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  cyanheads-aviation-weather-mcp-server:
    url: "https://aviation-weather.caseyjhand.com/mcp"
```

### Other

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

The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.

## Changelog

Every change recorded for this component, newest first. Days that predate change tracking, or that we cannot explain, say so: "we were watching and nothing happened" and "we were not watching" are different claims.

### 2026-08-03 (score 71, +1)

No change was recorded against any check on this day. Stability & Change Management went from 23 to 27. That category is still filling its 30-day observation window: 7 days of observed history at the previous scan, 8 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-08-01 (score 70, +1)

No change was recorded against any check on this day. Stability & Change Management went from 17 to 20. That category is still filling its 30-day observation window: 5 days of observed history at the previous scan, 6 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-07-31 (score 69, +1)

- [functional] We updated how we score, so this day's move reflects our rubric, not a change to the server

### 2026-07-30 (score 68, 0)

- [functional] We updated how we score, so this day's move reflects our rubric, not a change to the server

### 2026-07-29 (score 68, +1)

No change was recorded against any check on this day. Stability & Change Management went from 7 to 10. That category is still filling its 30-day observation window: 2 days of observed history at the previous scan, 3 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-07-28 (score 67, +1)

No change was recorded against any check on this day. Stability & Change Management went from 3 to 7. That category is still filling its 30-day observation window: 1 days of observed history at the previous scan, 2 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-07-27 (score 66, 0)

- [functional] We updated how we score, so this day's move reflects our rubric, not a change to the server

### 2026-07-26 (score 66)

First indexed and scored.

## MCP tools (5)

### `aviation_find_stations` (~205 tokens)

Find Aviation Weather Stations

Resolve an airport or weather reporting station by ICAO 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.). Station IDs must be 4-letter ICAO format (e.g., KSEA, KJFK). At least one of station_ids, bbox, or state is required.

Input parameters:

- `bbox` (object): Geographic bounding box for spatial queries.
- `state` (string): Two-letter US state abbreviation (e.g., "WA") to list all stations in that state.
- `station_ids` (array): One or more 4-letter ICAO station IDs (e.g., KSEA, KJFK). The upstream API only accepts ICAO format — 3-letter IATA codes (e.g., SEA) will return no results. Use bbox or state to discover ICAO IDs by…

Output parameters:

- `stations` (array): Matching stations.

### `aviation_get_metar` (~169 tokens)

Get METAR Weather Observations

Get current weather observations (METARs) for one or more airports. Returns decoded fields — wind direction/speed/gusts, visibility, ceiling, temperature, dewpoint, altimeter, cloud layers — plus the computed flight category (VFR/MVFR/IFR/LIFR) and the raw METAR string. Accepts 1–10 ICAO station IDs (e.g., KSEA, KJFK). Use aviation_find_stations to resolve or verify an ICAO ID, or to discover nearby stations.

Input parameters:

- `hours` (integer): Hours of observation history to return (1–12). Default 1 returns only the most recent observation per station.
- `station_ids` (array, required): ICAO station IDs to query. 1–10 stations per call.

Output parameters:

- `observations` (array): Weather observations, one per station/time pair. Multiple entries per station when hours > 1.

### `aviation_get_taf` (~133 tokens)

Get Terminal Aerodrome Forecast (TAF)

Get the Terminal Aerodrome Forecast (TAF) for one or more airports. Returns each forecast period with valid times, wind, visibility, decoded weather conditions, and cloud layers, 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).

Input parameters:

- `station_ids` (array, required): ICAO station IDs to query. 1–4 stations per call.

Output parameters:

- `forecasts` (array): TAF forecasts, one per requested station.

### `aviation_get_pireps` (~251 tokens)

Get Pilot Reports (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, and the raw PIREP string. Requires either station_id (ICAO center point for radial search, e.g., KSEA) or bbox (area search) — not both. Coverage is US-centric; PIREPs are sparse and absence of reports does not imply smooth conditions.

Input parameters:

- `altitude_max_ft` (integer): Filter by maximum altitude in feet MSL (e.g., 35000 for FL350). Optional.
- `altitude_min_ft` (integer): Filter by minimum altitude in feet MSL (e.g., 18000 for FL180). Optional.
- `bbox` (object): Geographic bounding box for area PIREP search.
- `distance_nm` (integer): Search radius in nautical miles around station_id. Only used when station_id is provided. Default 100.
- `hours` (integer): How many hours of history to return. Default 3.
- `station_id` (string): ICAO station ID as center point for radial search (e.g., KSEA). Use with distance_nm.

Output parameters:

- `pireps` (array): Pilot reports matching the search criteria, ordered by observation time descending.

### `aviation_get_advisories` (~284 tokens)

Get Active Aviation Advisories (SIGMETs / AIRMETs)

Get active SIGMETs and AIRMETs for a region. Returns each advisory with hazard type (CONVECTIVE, TURBULENCE, ICING, IFR, MTN OBSCN, etc.), severity, altitude range, valid period, polygon coordinates, and raw text. Coverage is US-centric (NWS Aviation Weather Center). During fair-weather periods no advisories may be active — an empty result is normal, not an error. Filter by advisory_type, hazard, or bbox.

Input parameters:

- `advisory_type` (string): Filter by advisory type. "sigmet" includes convective SIGMETs. "airmet" includes AIRMET Sierra (IFR/mountain obscuration), Tango (turbulence), and Zulu (icing). "all" returns both.
- `bbox` (object): Geographic bounding box to filter advisories by polygon overlap.
- `hazard` (string): Optional hazard filter. CONVECTIVE = convective SIGMETs; TURBULENCE = AIRMET Tango; ICING = AIRMET Zulu; IFR = AIRMET Sierra (IFR conditions); MTN OBSCN = AIRMET Sierra (mountain obscuration); SURFAC…

Output parameters:

- `advisories` (array): Active advisories matching the filter criteria. May be empty during fair weather periods.

## Diagnostics

Captured diagnostic sections: TLS, DNSSEC, Authorisation, Transports. The full working is on the page: https://verifymcp.io/servers/cyanheads-aviation-weather-mcp-server/aviation-weather#diagnostics

## Score history

- 2026-08-03: 71
- 2026-08-02: 70
- 2026-08-01: 70
- 2026-07-31: 69
- 2026-07-30: 68
- 2026-07-29: 68
- 2026-07-28: 67
- 2026-07-27: 66
- 2026-07-26: 66

## Links

- Remote endpoint: https://aviation-weather.caseyjhand.com/mcp
- Repository: https://github.com/cyanheads/aviation-weather-mcp-server
- Changelog RSS feed: https://verifymcp.io/servers/cyanheads-aviation-weather-mcp-server/aviation-weather/changelog.xml
- Changelog JSON feed: https://verifymcp.io/servers/cyanheads-aviation-weather-mcp-server/aviation-weather/changelog.json
- HTML version of this page: https://verifymcp.io/servers/cyanheads-aviation-weather-mcp-server/aviation-weather