# MeteoSwiss MCP Server

> Swiss weather data for AI assistants — forecasts, measurements, stations, pollen.

- name: io.github.eins78/meteoswiss-mcp
- version: 2.0.2
- connection class: R0 (autonomous)
- trust: 83/100
- quality: 71/100 (needs work)
- owner: not claimed
- descriptor: https://api.protogrid.dev/v1/servers/io.github.eins78%2Fmeteoswiss-mcp
- tools: https://api.protogrid.dev/v1/servers/io.github.eins78%2Fmeteoswiss-mcp/tools

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

## Connection (mcpServers)

```json
{
  "mcpServers": {
    "meteoswiss-mcp": {
      "type": "http",
      "url": "https://meteoswiss-mcp.ars.is/mcp"
    }
  }
}
```


## Trust

- hygiene: 100
- liveness: 100
- freshness: 45
- provenance: 80
- drivers: +repository +namespace-matches-repo +reachable +uptime-100% -stale-205d
- Derived from observable signals (official registry feed and our own credential-free probes); no code audit performed.

## Quality 71/100 (needs work)

### protocol: 75 (weight 25)

- warn `protocol.modern`: newest supported version is 2025-11-25; 2026-07-28 not supported, older versions are deprecated until 2027-07-28
- n/a `protocol.stateless`: only applies to 2026-07-28 servers
- pass `protocol.transport`: streamable HTTP
- n/a `protocol.list_ttl`: only applies to 2026-07-28 servers

### 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: 64 (weight 30)

- pass `tools.descriptions`: every tool has a description
- warn `tools.description_length`: 1 tools have descriptions over 1,024 characters, which crowds the context
- pass `tools.schemas`: every tool has an object input schema
- fail `tools.annotations`: no tool declares readOnlyHint or destructiveHint, so clients cannot tell safe calls from risky ones
- fail `tools.directory_hints`: no tool declares all four of readOnlyHint, destructiveHint, idempotentHint and openWorldHint; missing: search (readOnlyHint, destructiveHint, idempotentHint, openWorldHint); meteoswissCurrentWeather (readOnlyHint, destructiveHint, idempotentHint, openWorldHint); fetch (readOnlyHint, destructiveHint, idempotentHint, openWorldHint); …
- pass `tools.token_cost`: about 2,449 tokens to load every tool
- pass `tools.api_dump`: tools are not a one-to-one API dump

### stability: 100 (weight 15)

- pass `stability.changes`: 1 tool changes in 30 days
- pass `stability.rug_pull`: no tool changed its meaning under the same name

### dependencies: 50 (weight 15)

- warn `deps.known_vulns`: 1 advisory of lower severity or without a published fix: GHSA-5r4p-p66f-jhc7 in hono@4.13.9 (indirect, fixed in 4.13.11)
- fail `deps.mcp_sdk_version`: @modelcontextprotocol/sdk 1.30.1 has 3 known advisories (GHSA-22jm-h49p-29qw, GHSA-6prh-2h8m-c8cw, GHSA-6qxp-vccf-f47h); update @modelcontextprotocol/sdk to 1.32.0 or later
- pass `deps.resolvable`: meteoswiss-mcp@2.0.2 resolved: 212 packages

- tools: 7, about 2,449 tokens to load them all
- tool set hash: 3a509e54947ad832ee930ee5d44c8f5e
- tools last changed: 2026-10-11T16:50:22.688Z
- badge: [![protogrid quality](https://protogrid.dev/badge/io.github.eins78/meteoswiss-mcp.svg)](https://protogrid.dev/servers/io.github.eins78/meteoswiss-mcp)
- Checks run on what our credential-free, read-only probes observe; tools are never called and no code audit is performed.

### Tool changes

- 2026-10-11 `meteoswissLocalForecast` changed (outputSchema)

Full history: https://api.protogrid.dev/v1/servers/io.github.eins78%2Fmeteoswiss-mcp/changes

## Dependencies

- npm meteoswiss-mcp@2.0.2: resolved, 211 dependencies, MCP SDK @modelcontextprotocol/sdk 1.30.1
  - GHSA-22jm-h49p-29qw (high) in `` @modelcontextprotocol/sdk@1.30.1 ``, direct, fixed in `` 1.32.0 ``, advisory summary: "MCP TypeScript SDK: Experimental tasks were not tied to the session that created them" https://osv.dev/vulnerability/GHSA-22jm-h49p-29qw
  - GHSA-6qxp-vccf-f47h (high) in `` @modelcontextprotocol/sdk@1.30.1 ``, direct, fixed in `` 1.31.0 ``, advisory summary: "MCP TypeScript SDK: OAuth client could send credentials to an authorization server chosen by the MCP server" https://osv.dev/vulnerability/GHSA-6qxp-vccf-f47h
  - GHSA-6prh-2h8m-c8cw (moderate) in `` @modelcontextprotocol/sdk@1.30.1 ``, direct, fixed in `` 1.32.0 ``, advisory summary: "MCP TypeScript client SDK: HTTP client transports and OAuth requests followed cross-origin redirects and re-sent custom headers and request bodies" https://osv.dev/vulnerability/GHSA-6prh-2h8m-c8cw
  - GHSA-5r4p-p66f-jhc7 (moderate) in `` hono@4.13.9 ``, indirect, fixed in `` 4.13.11 ``, advisory summary: "Hono: \`serveStatic\` decodes the request path a second time, leading to bypass of middleware on static paths" https://osv.dev/vulnerability/GHSA-5r4p-p66f-jhc7

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://meteoswiss-mcp.ars.is/mcp (streamable-http, auth none, reachable true, uptime30d 1)

## Packages

- npm meteoswiss-mcp@2.0.2

## Tools (7)

- `fetch`: Fetch full content from a MeteoSwiss webpage and convert to markdown or plain text. Use the search tool first to discover valid page URLs, then pass the full URL as the id parameter.
- `meteoswissClimateData`: Get homogeneous climate measurement series from Switzerland's National Basic Climatic Network (NBCN). Returns temperature, precipitation, sunshine, radiation, wind, pressure, and climate indicators (frost days, summer days, heat days) going back decades.

29 climate stations + 46 precipitation stations with daily, monthly, and yearly resolution.

Use cases: "What are typical January temperatures in Zurich?", "How has precipitation changed in Basel over 50 years?", "How many heat days did Lugano have last year?"

Accepts station names ("Zurich", "Basel"), abbreviations ("SMA", "BAS"), or WGS84 coordinates.
- `meteoswissCurrentWeather`: Get real-time weather measurements from ~300 Swiss automatic weather stations (~160 full weather + ~140 precipitation-only). Returns temperature, precipitation, wind, humidity, pressure, sunshine, and more. Data updates every 10 minutes. Precipitation-only stations return only rainfall data.

For 8 stations (Zurich, Basel, Chur, Sion, Altdorf, Säntis, Jungfraujoch, Grand St-Bernard), also includes daily visual observations: cloud cover, fog, rain, snowfall, hail, and snow coverage.

Accepts station names ("Zurich"), abbreviations ("SMA"), addresses ("Bahnhofplatz 1 Bern"), or WGS84 coordinates. Automatically finds the nearest station.
- `meteoswissLocalForecast`: Get a multi-day weather forecast for any Swiss location. Returns daily summaries (temperature, precipitation, sunshine, wind, weather icon) plus a hierarchical hourly breakdown of every series.

This uses official MeteoSwiss Open Data — the same forecasts powering the MeteoSwiss app and website.

Accepts:
- Postal codes: "8001" (Zurich), "3000" (Bern), "1200" (Geneva)
- Station abbreviations: "SMA" (Zurich Fluntern), "BER" (Bern)
- Place names: "Zurich", "Basel", "Lugano"

Coverage: ~6000 Swiss locations (all postal codes + weather stations + mountain points).
Forecast horizon: up to 9 days. Updated hourly.

Each day's summary fields: temperature_min_c, temperature_max_c, precipitation_total_mm,
sunshine_total_minutes, wind_avg_kmh, wind_gust_max_kmh, weather, weather_icon_url.

Each day also includes "hourly": one array of per-hour objects covering every series
together — { time, temperature_c, precip_mm, sunshine_minutes, wind_kmh, wind_gust_kmh } —
useful for judging *when* rain, sun, or wind is expected, not just the daily summary:
- Each entry's "time" is already local wall-clock time for the location (Europe/Zurich),
  with the UTC offset included, e.g. "2026-07-09T14:00:00+02:00". It is NOT UTC — do not
  convert it.
- A dry/calm/sunless hour is reported as its measured value (often 0), not omitted. A
  fully dry day is still a full array of zero-precipitation hours, not an empty array.
- Each field is independently null if just THAT series has no reading for a given hour —
  the other fields for that same hour are still populated. An hour is omitted entirely
  only when every series is missing for it.
- "hourly" itself is null when no hourly breakdown exists for this location at all (a
  total data gap); [] only when this location supports hourly data but none was available
  for that specific day.
- For weather stations, temperature_min_c/temperature_max_c/precipitation_total_mm are
  MeteoSwiss's own official daily aggregates — a different, separately-curated product
  from the hourly series shown alongside them. They can legitimately NOT match summing/
  averaging the hourly entries for that day; this is expected, not a data error.
  sunshine_total_minutes/wind_avg_kmh/wind_gust_max_kmh have no official daily product for
  stations and are always derived from the hourly series. For postal codes/mountain
  points, every summary field is derived from the same hourly series shown alongside it,
  so it always matches summing/averaging that series exactly.
- `meteoswissPollenData`: Get current pollen concentration data from MeteoSwiss monitoring stations (~15 stations across Switzerland). Shows pollen levels for 7 measured species (alder, birch, hazel, beech, ash, oak, grasses) — each is always included, with a "no-current-data" status when out of season. Ambrosia (ragweed) is a MeteoSwiss forecast-only category and is not part of this OGD measurement network, so it is not included. Useful for allergy sufferers.
- `meteoswissStations`: List and search MeteoSwiss measurement stations. Filter by name, canton, or browse the full network of ~300 stations (~160 full weather + ~140 precipitation-only) across Switzerland.
- `search`: Search MeteoSwiss website content in multiple languages (DE, FR, IT, EN). Returns relevant pages with URLs that can be passed to the fetch tool. Always returns up to 10 results per page — the upstream API has a fixed page size that cannot be changed. Note: pagination may return duplicate results across pages (upstream API limitation).