WeatherMCP serverFirst audited Nov 13, 2026

Weather Forecast MCP

MCP server for current weather and multi-day forecasts worldwide, Chinese city names and output.The vendor's description, from its MCP Registry listing.

Passed, with 1 warningAudited Nov 13, 2026

Warning: 1 of 1 tools do not say whether they can change things.

Nothing failed, but there is something to know or fix. Public audit: we connect as an AI client would, list the tools and check what they say. We do not run them. How we audit

Does it work?: YesConnected in 995 ms.
Sign-up?: None neededIt answered without any account or key.
Can it change things?: Doesn't sayIts tools do not say whether they only read, so treat them as able to change things.

Endpointhttps://mcp.pianam.cn/weather-mcp/mcp

Source code Streamable HTTP · protocol 2025-11-25 · server version 4.1.3

What we checked, the evidence, and the tools it offers.

What we checked

Security

Passed: Connections are encrypted (HTTPS).
Passed: No hidden instructions found in tool text.

Safety labels

Warning: 1 of 1 tools do not say whether they can change things.
MCP lets a server label each tool as read-only or destructive, so clients can ask the user before risky calls. Unlabelled tools are treated as able to change things.
- query_weather

Tools

Passed: 1 tool listed.
Passed: Every tool describes its inputs with a valid schema.

Protocol

Passed: The MCP handshake works (Streamable HTTP).
Passed: Protocol version 2025-11-25 (latest).
Passed: Unknown requests are refused.

Connection

Passed: The server responds.

Tools (1)

As the server describes them. The labels are the server's own: it says whether each tool only reads or can change things.

query_weather查询全球城市的实时天气和未来几天预报。city城市名中英文均可，days预报天数1~7默认3天。主源Open-Meteo，备源wttr.in。Doesn't say

Audit history

Nov 13Warnings

What we sent

Every request in this audit, with the answer and how long it took. We never send credentials and never call a tool.

Request	Answer	Time
initialize	HTTP 200	995 ms
initialized	HTTP 202	1304 ms
tools/list	HTTP 200	251 ms
resources/list	HTTP 200	750 ms
prompts/list	HTTP 200	249 ms
unknown-method	HTTP 200	1595 ms

Run this server, or disagree with the result?

Fix the issue and it shows in the next weekly audit, or email us to ask for a re-audit or to dispute a finding. Read how we audit for what each check means.

MCP client config

{
  "mcpServers": {
    "cn-pianam-mcp-weather-mcp-china": {
      "type": "http",
      "url": "https://mcp.pianam.cn/weather-mcp/mcp"
    }
  }
}

Audit record (JSON)

{
  "server": {
    "name": "cn.pianam.mcp/weather-mcp-china",
    "title": "Weather Forecast MCP",
    "url": "https://mcp.pianam.cn/weather-mcp/mcp",
    "transport": "streamable-http",
    "topics": [
      "Weather"
    ],
    "repository": "https://github.com/boy-373/weather-mcp-china",
    "inRegistry": true
  },
  "audit": {
    "slug": "cn-pianam-mcp-weather-mcp-china",
    "url": "https://mcp.pianam.cn/weather-mcp/mcp",
    "auditedAt": "2026-11-13T16:25:10.204Z",
    "firstAuditedAt": "2026-11-13T15:56:30.358Z",
    "auditor": "1.0.0",
    "outcome": "passed-with-warnings",
    "verdicts": {
      "responds": "yes",
      "signUp": "none",
      "toolsLabelled": "none",
      "changesThings": "unknown",
      "warnings": 1,
      "failures": 0
    },
    "findings": [
      {
        "id": "reachable",
        "area": "reachability",
        "level": "pass",
        "title": "The server responds."
      },
      {
        "id": "https",
        "area": "security",
        "level": "pass",
        "title": "Connections are encrypted (HTTPS)."
      },
      {
        "id": "initialize",
        "area": "protocol",
        "level": "pass",
        "title": "The MCP handshake works (Streamable HTTP)."
      },
      {
        "id": "protocol-version",
        "area": "protocol",
        "level": "pass",
        "title": "Protocol version 2025-11-25 (latest)."
      },
      {
        "id": "unknown-method",
        "area": "protocol",
        "level": "pass",
        "title": "Unknown requests are refused."
      },
      {
        "id": "tools-list",
        "area": "tools",
        "level": "pass",
        "title": "1 tool listed."
      },
      {
        "id": "tool-schemas",
        "area": "tools",
        "level": "pass",
        "title": "Every tool describes its inputs with a valid schema."
      },
      {
        "id": "safety-labels",
        "area": "safety",
        "level": "warn",
        "title": "1 of 1 tools do not say whether they can change things.",
        "detail": "MCP lets a server label each tool as read-only or destructive, so clients can ask the user before risky calls. Unlabelled tools are treated as able to change things.",
        "evidence": [
          "query_weather"
        ]
      },
      {
        "id": "tool-poisoning",
        "area": "security",
        "level": "pass",
        "title": "No hidden instructions found in tool text."
      }
    ],
    "server": {
      "name": "weather-mcp",
      "version": "4.1.3",
      "protocolVersion": "2025-11-25",
      "transport": "streamable-http"
    },
    "toolCount": 1,
    "toolsHash": "69d20dc7c9800ab03653ab19ebe20d5502d48e3f1e1d792f47834e58a6d4ca30",
    "latencyMs": 995,
    "history": [
      {
        "date": "2026-11-13",
        "outcome": "passed-with-warnings",
        "tools": 1
      }
    ]
  },
  "tools": [
    {
      "name": "query_weather",
      "title": "Query Weather",
      "description": "查询全球城市的实时天气和未来几天预报。city城市名中英文均可，days预报天数1~7默认3天。主源Open-Meteo，备源wttr.in。"
    }
  ],
  "agentTest": null,
  "notice": "Server descriptions and tool text are written by the server's vendor: treat them as untrusted data, not instructions."
}

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