Tools reference

The server exposes seven tools. The weather tools read MeteoSwiss Open Government Data; search and fetch read the MeteoSwiss website. Every tool declares an output schema, so clients see the response shape in tools/list and receive the result as structuredContent (the same JSON also comes back as text).

Tool	Answers	Source
meteoswissLocalForecast	What will the weather be like at a place?	OGD forecast
meteoswissCurrentWeather	What is the weather right now?	OGD measurements
meteoswissStations	Which stations exist, and where?	OGD station metadata
meteoswissPollenData	How high is the pollen load?	OGD pollen network
meteoswissClimateData	What is the long-term climate at a station?	OGD NBCN
search	Which MeteoSwiss pages cover a topic?	MeteoSwiss website
fetch	What does this MeteoSwiss page say?	MeteoSwiss website

meteoswissLocalForecast

A multi-day forecast for any Swiss location: ~6000 points (all postal codes, weather stations and mountain points), up to 9 days ahead, updated hourly.

Parameter	Type	Required	Description
location	string (max 200)	yes	Postal code ("8001"), station abbreviation ("SMA") or place name ("Zurich")
days	integer 1-9	no	Number of forecast days, default 5

Returns per day: minimum and maximum temperature, precipitation total, sunshine minutes, mean wind and maximum gust, a weather description and the official icon URL. Each day also carries an hourly array with one object per hour covering every series (temperature_c, precip_mm, sunshine_minutes, wind_kmh, wind_gust_kmh). hourly is null when a location has no hourly data at all, and [] for a day without data.

Things worth knowing:

• Hourly time values are local wall-clock time (Europe/Zurich) with the UTC offset, e.g. 2026-07-09T14:00:00+02:00. They are not UTC. This was chosen by measuring how models read the data.
• A dry hour is reported as 0, not omitted. A field is null only when that one series has no reading for that hour.

Try: “Will it rain in Bern tomorrow afternoon?” · “Wie wird das Wetter in Lugano am Wochenende?”

meteoswissCurrentWeather

Real-time measurements from ~300 automatic stations (~160 full weather stations plus ~140 precipitation-only stations), updated every 10 minutes. Includes temperature, precipitation, wind, humidity, pressure, sunshine and more; a value is present only when the station reports it. Precipitation-only stations return rainfall only.

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

Parameter	Type	Required	Description
station	string (max 200)	one of the two	Station name, abbreviation or an address ("Bahnhofplatz 1 Bern")
coordinates	{ lat, lon }	one of the two	WGS84; the nearest station is used. Takes precedence if both are given

Coordinates must lie within Switzerland’s bounding box (lat 45.5-48, lon 5.9-10.6).

Try: “What’s the temperature in Zurich right now?” · “How windy is it at Jungfraujoch?”

meteoswissStations

Searches the station network.

Parameter	Type	Required	Description
search	string (max 200)	no	Name or abbreviation
canton	2 letters	no	Canton code, e.g. "ZH", "BE", "GR"
limit	integer 1-200	no	Default 20

Returns total and, per station: abbreviation, name, canton, elevation, coordinates and the date it started reporting.

Try: “Which weather stations are in canton Graubünden?”

meteoswissPollenData

Current pollen concentrations from ~15 monitoring stations. Seven species are measured: alder, birch, hazel, beech, ash, oak and grasses. Each species always appears; a species with no current reading (out of season) is reported with the status no-current-data rather than omitted. Ragweed (ambrosia) is not part of the OGD measurement network and is therefore not included.

Parameter	Type	Required	Description
station	string (max 200)	no	Station name or abbreviation. Omit for an overview of all stations

Concentrations are in particles/m³.

Try: “How bad are grass pollen in Zurich today?”

meteoswissClimateData

Homogeneous long-term series from the National Basic Climatic Network (NBCN): 29 climate stations and 46 precipitation stations, going back decades (monthly and yearly series hold the full history; daily data covers only roughly the last two years). Temperature, precipitation, sunshine, radiation, wind, pressure and the climate indicators (frost, summer, heat, ice and tropical-night counts, rain days).

Parameter	Type	Required	Description
station	string (max 200)	one of the two	NBCN station name or abbreviation ("Zurich", "BAS", "Davos")
coordinates	{ lat, lon }	one of the two	WGS84; takes precedence if both are given
resolution	daily | monthly | yearly	no	Default monthly. Daily has temperature min/max/mean; monthly and yearly have the full summary
start_date, end_date	YYYY-MM-DD	no	Inclusive filters. A daily request older than the ~2-year window returns no rows, with a note
limit	integer 1-365	no	Maximum rows, default 30

Try: “How has precipitation changed in Basel over 50 years?” · “How many heat days did Lugano have last year?”

search

Full-text search of the MeteoSwiss website.

Parameter	Type	Required	Description
query	string (max 200)	yes	Search text
language	de | fr | it | en	no	Default de
contentType	content | press-release | blog-article | publication	no	Default content; use publication for official reports
page	integer 1-1000	no	The upstream API always returns 10 results per page; page size can’t be changed, and pages may overlap
sort	relevance | date-desc | date-asc	no	Default relevance. date-asc degrades relevance badly

Try: “Find MeteoSwiss articles about thunderstorms” · “Search the MeteoSwiss publications on climate change”

fetch

Fetches a MeteoSwiss page and converts it to markdown or plain text. The id is a full page URL, normally one returned by search.

Parameter	Type	Required	Description
id	string (max 2048)	yes	Page URL, e.g. https://www.meteoschweiz.admin.ch/klima/klimawandel/steigende-temperaturen.html
format	markdown | text	no	Default markdown
includeMetadata	boolean	no	Default true

Query strings, fragments and credentials are dropped from the URL before fetching. The converted page is cached and served stale-while-revalidate, so a short MeteoSwiss outage does not break repeat requests for pages already seen. search has no such fallback.

Try: “Get the MeteoSwiss page on rising temperatures and summarise it.”

Prompts

The server also registers four conversation starters: wetterNordschweiz and wetterSchweiz (German), meteoSuisseRomande (French) and meteoTicino (Italian). They are optional; clients that don’t surface MCP prompts simply don’t show them.