meteoswiss-weather-and-climate-mcp (malkreide/meteoswiss-mcp) is an MCP server listed on the M8ven Trust Index. It scores 71 out of 100, grade C. It declares 12 tools. No publisher has claimed this listing.

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C
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71/100

meteoswiss-weather-and-climate-mcp

MCP server for Swiss weather and climate data from MeteoSwiss.

→ malkreide/meteoswiss-mcp· listed on glama

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Limited view: static analysis for Python is partially covered.

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Who stands behind it

malkreide

Source: Glama · also listed on ModelScope

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Install from

Glamanot scored hereModelScopenot scored here

The grade above is for the source repository. Registries can serve a different version, so we mark the ones we were not able to read.

// key findings
✅
12 tools verified — handlers match their declared behaviour
6 read-only tools verified — handlers contain no write/delete/exec
✅
No credential exfiltration, no sensitive file access, no obfuscation
Static analysis found nothing flowing your secrets to unexpected places.
✅
Open source with a license and README
Anyone can audit the code, the license is declared, and the publisher documents what it does.
🔐
You'll be asked for 1 credential: MCP_API_KEY
These are read from process.env at runtime. Make sure you trust where they’ll be sent.
// environment variables
To run this server yourself, you supply these values. They go in your own MCP client configuration and stay on your machine. The secret label means the value is sensitive, not that the server mishandles it.
configMCP_LOG_LEVELINFO DEBUG / INFO / WARNING / ERROR — structured JSON logs on stderr
configOTEL_EXPORTER_OTLP_ENDPOINT_unset_ If set + pip install meteoswiss-mcp[otel]: OpenTelemetry spans per tool call + automatic httpx instrumentation are sent as OTLP-HTTP to the collector.
configOTEL_SERVICE_NAMEmeteoswiss_mcp Service name in the OTel resources
configMCP_CACHE_TTL_STAC300 TTL in seconds for STAC SMN observations (default 5 min)
configMCP_CACHE_TTL_OPEN_METEO600 TTL for ICON forecasts (default 10 min)
configMCP_CACHE_TTL_GEOCODING3600 TTL for geocoding lookups (default 1 h)
configMCP_CACHE_TTL_OPENDATA3600 TTL for the opendata.swiss catalogue (default 1 h)
configMCP_CACHE_TTL_WARNINGS300 TTL for warnings (MeteoSwiss App-API / structured override; default 5 min)
configMCP_CACHE_TTL_STAC_CLIMATE
configMCP_CACHE_ENABLED1 0 disables the TTL cache entirely (e.g. for end-to-end tests)
configMCP_STATELESS_HTTP0 1 enables the SDK's stateless mode → each HTTP request opens a new session. Prerequisite for multi-replica deploys without sticky sessions (SCALE-002/003).
configMCP_CLIMATE_NORMALS_PATH_unset_ Path to a JSON file with additional climate normals — see data/climate-normals.example.json
configMCP_CLIMATE_NORMALS_URL_TEMPLATE
configMCP_WARNINGS_API_URL
configMCP_TRANSPORTstdio stdio or streamable-http
configMCP_HOST127.0.0.1 Bind address — never change locally
configMCP_PORT8000 Port
configMCP_ALLOWED_HOSTS
configMCP_ALLOWED_ORIGINS_unset_ Comma-separated list of allowed origins for CORS. Empty = CORS disabled (same-origin only). Mcp-Session-Id is exposed automatically.
🔐 secretMCP_API_KEY_unset_ If set: every request except /health requires X-API-Key: <key> or Authorization: Bearer <key>. Constant-time comparison.
configMCP_ALLOW_ANY_HOST_unset_ Must be set to 1 to allow the server to bind to 0.0.0.0 (containers/cloud only)
// quality suggestions

Tool annotations

6/12 tools have annotations

Add readOnlyHint or destructiveHint annotations to every tool so hosts can warn users before invoking.

All four hints declared on every tool

6/12 tools missing one or more hints — meteo_stations (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); meteo_current (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); meteo_forecast (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint), +3 more. OpenAI's directory rejects tools where any of the four hints are missing or non-boolean.

For every tool, set all four hints (readOnlyHint, destructiveHint, idempotentHint, openWorldHint) to explicit true/false values that match the handler’s actual behaviour.

Tool handlers catch errors

8/12 tool handlers wrap calls in try/catch (67%)

Wrap each tool handler body in try/catch and return a structured error response.

Tests exist

No test files found

Add tests that exercise each declared tool.

Claim the listing to review these findings one by one and send us a correction where you disagree, straight to the team. Claiming also means we tell you when the grade moves, and reach you first if we find anything urgent.

// full audit trail
The findings above are the summary. The full trail, every check we ran, each deduction, the network hosts observed and the dependency advisories, goes to verified publishers, along with an alert whenever a new one lands. Verified publishers can also review each finding and dispute it in one click. Publisher corrections have sharpened several of our checks this month, because the maintainer knows the codebase better than any scanner.
// improvement guidance — verified publishers only
We have 4 concrete improvements we can share with the publisher of this MCP. Each comes with specific guidance to raise the trust score.
// embed badge in your README
[![M8ven Score](https://m8ven.ai/badge/mcp/malkreide/meteoswiss-mcp)](https://m8ven.ai/mcp/malkreide/meteoswiss-mcp)
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commit: cfdcba2098ed74e51c7a26cdc3d9a6cf99b8fe5e
code hash: f47d0694ddc5df8b73ae56c95544f5ea900b55489aeac04872e4b3fce80e2e31
view raw JSON →
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