WeatherSAFE
A Model Context Protocol (MCP) server that provides hourly and daily weather forecasts using the AccuWeather API.
Overview
From the repository's own README, as read at the audited commit. Badges and raw HTML are left out.
[](https://www.npmjs.com/package/@timlukahorstmann/mcp-weather) [](https://github.com/TimLukaHorstmann/mcp-weather/blob/main/LICENSE) [](https://www.npmjs.com/package/@timlukahorstmann/mcp-weather) [](https://github.com/TimLukaHorstmann/mcp-weather/issues) [](https://www.npmjs.com/package/@timlukahorstmann/mcp-weather) [](https://archestra.ai/mcp-catalog/timlukahorstmann__mcp-weather)
A Model Context Protocol (MCP) server that provides hourly and daily weather forecasts using the AccuWeather API.
Quick Start
You need an AccuWeather API key (free tier available). Sign up here and create an app to get your key.
Export your API key as an environment variable:
export ACCUWEATHER_API_KEY=your_api_key_here
Then run the MCP Weather server directly with:
npx -y @timlukahorstmann/mcp-weather
Or, for HTTP/REST access via supergateway:
npx -y supergateway --stdio "npx -y @timlukahorstmann/mcp-weather" \ --port 4004 \ --baseUrl http://127.0.0.1:4004 \ --ssePath /messages \ --messagePath /message \ --cors "*" \ --env ACCUWEATHER_API_KEY="$ACCUW
fe2e91b102d5OBSERVED · 2026-10-08Connect
Built from this server's own package name, version and transport as found in its source — not copied from anyone's documentation, so it cannot drift against a page we do not control. Replace the environment placeholders with a token scoped to the least it needs.
claude mcp add mcp-weather --env ACCUWEATHER_API_KEY=${ACCUWEATHER_API_KEY} -- npx -y @timlukahorstmann/[email protected]{
"mcpServers": {
"mcp-weather": {
"command": "npx",
"args": [
"-y",
"@timlukahorstmann/[email protected]"
],
"env": {
"ACCUWEATHER_API_KEY": "${ACCUWEATHER_API_KEY}"
}
}
}
}Exposed tools (2)
2 read · 0 write · 0 destructive.
| Tool | Risk | Description |
|---|---|---|
weather-get_daily | read | Get daily weather forecast for up to 15 days |
weather-get_hourly | read | Get hourly weather forecast for the next 12 hours |
Trust audit
SAFEgrade B · trust 89/100 Nothing in the source contradicts what it says it does. Grade A is reserved for packages that have also passed the behavioural sandbox.
| Layer | What it checks | Result |
|---|---|---|
| L0 | Provenance & inventory | PASS |
| L1 | Static analysis of the code | PASS |
| L2 | Instruction surface (what it tells the agent) | PASS |
| L3 | Class-specific surface | PASS |
| L4 | Behavioural (sandbox) | SKIPPED |
What the source does
- Filesystem
- none-observed
- Network
- declared (5 observation(s))
- Shell
- none-observed
- Dependencies
- not all pinned
- Secrets in source
- none-found
Findings (2)
--baseUrl http://127.0.0.1:4004 \
@modelcontextprotocol/sdk, axios, zod, @types/istanbul-lib-coverage, @types/istanbul-reports, @types/jest, @types/node, @typescript-eslint/eslint-plugin
Gates applied: no_behavioural_pass.
fe2e91b102d5full audit observations/trust-audit/mcp-server/timlukahorstmann__weather-16.json · Report an issue / request a re-scanAudit history
Every audit this server has had. A grade with a past is a grade somebody is still checking.
| Date | Source | Verdict | Grade | Score | Change |
|---|---|---|---|---|---|
| 2026-10-08 | fe2e91b102d5 | SAFE | B | 89 | first audit |
Questions
What is the Weather MCP server?
A Model Context Protocol (MCP) server that provides hourly and daily weather forecasts using the AccuWeather API.
What tools does Weather expose?
2 in total: 2 read-only, 0 that write, and 0 that can delete or overwrite. Every one is listed on this page with its risk.
Is Weather safe to connect to an agent?
The audit found nothing in the source that contradicts what it says it does, and graded it B (89/100). Grade A is held back for packages that have also passed a sandboxed behavioural run, which is why a clean server reads B.
What credentials does Weather need?
It reads ACCUWEATHER_API_KEY from the environment. Give it a token scoped to the least it needs — an agent that can be talked into calling a tool can be talked into calling it with your credentials.
How does Weather run?
It speaks stdio, so it runs as a local process your client starts. It is published on npm as @timlukahorstmann/mcp-weather at 0.4.2.
How current is this page?
The grade is for one exact copy of the source (fe2e91b102d5), read on 2026-10-08. The repository is watched and re-audited when it changes.