WeatherMCP serverFirst audited Nov 13, 2026

Japan Weather Forecast Archive (JMA, as issued)

What did Japan's weather agency forecast, as issued at a past time? Archive of JMA bulletins.The vendor's description, from its MCP Registry listing.

Passed public checksAudited Nov 13, 2026

Every public check ran and passed. 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 834 ms.
Sign-up?: None neededIt answered without any account or key.
Can it change things?: No, read-onlyAll 4 tools say they only read.

Endpointhttps://jp-forecast-archive-production.mk-career-planning.workers.dev/mcp

Website Streamable HTTP · protocol 2025-11-25 · server version 0.1.0

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

Passed: Every tool says whether it only reads or can change things.

Tools

Passed: 4 tools 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 (4)

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

catalogList the tools of this server with prices, data sources, licensing, daily limits and data freshness.Read-only
forecast_as_issuedArchived JMA prefectural weather forecast as issued. Give an area and at (forecast in effect then) or issued_at (exact JMA issue time). Returns JMA's bulletin as published (Japanese weather text, win…Read-only
forecast_issuancesWhich prefectural weather forecasts did JMA issue for an area between two times? Lists each archived issuance (JMA issue time, transmission time, our fetch time, scheduled/unscheduled/correction/canc…Read-only
get_receiptRe-fetch the stored result of a settled paid call by its receipt_id, for when the response was lost after payment. Free. Unknown or unsettled receipt ids return RECEIPT_NOT_FOUND. Results are kept fo…Read-only

Audit history

Nov 13Passed

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	834 ms
initialized	HTTP 202	487 ms
tools/list	HTTP 200	131 ms
unknown-method	HTTP 200	131 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": {
    "io-github-mk-career-planning-jp-forecast-archive": {
      "type": "http",
      "url": "https://jp-forecast-archive-production.mk-career-planning.workers.dev/mcp"
    }
  }
}

Audit record (JSON)

{
  "server": {
    "name": "io.github.mk-career-planning/jp-forecast-archive",
    "title": "Japan Weather Forecast Archive (JMA, as issued)",
    "url": "https://jp-forecast-archive-production.mk-career-planning.workers.dev/mcp",
    "transport": "streamable-http",
    "topics": [
      "Weather"
    ],
    "website": "https://jp-forecast-archive-production.mk-career-planning.workers.dev/llms.txt",
    "inRegistry": true
  },
  "audit": {
    "slug": "io-github-mk-career-planning-jp-forecast-archive",
    "url": "https://jp-forecast-archive-production.mk-career-planning.workers.dev/mcp",
    "auditedAt": "2026-11-13T16:27:06.581Z",
    "firstAuditedAt": "2026-11-13T15:58:53.058Z",
    "auditor": "1.0.0",
    "outcome": "passed",
    "verdicts": {
      "responds": "yes",
      "signUp": "none",
      "toolsLabelled": "all",
      "changesThings": "no",
      "warnings": 0,
      "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": "4 tools listed."
      },
      {
        "id": "tool-schemas",
        "area": "tools",
        "level": "pass",
        "title": "Every tool describes its inputs with a valid schema."
      },
      {
        "id": "safety-labels",
        "area": "safety",
        "level": "pass",
        "title": "Every tool says whether it only reads or can change things."
      },
      {
        "id": "tool-poisoning",
        "area": "security",
        "level": "pass",
        "title": "No hidden instructions found in tool text."
      }
    ],
    "server": {
      "name": "jp-forecast-archive",
      "version": "0.1.0",
      "title": "Japan Weather Forecast Archive (JMA, as issued)",
      "protocolVersion": "2025-11-25",
      "transport": "streamable-http"
    },
    "toolCount": 4,
    "toolsHash": "5600efc8e8c11198fbe73cf7520a6caa8b005b3b8c8a23b595e71008f1974fb1",
    "latencyMs": 834,
    "history": [
      {
        "date": "2026-11-13",
        "outcome": "passed",
        "tools": 4
      }
    ]
  },
  "tools": [
    {
      "name": "catalog",
      "title": "Catalog: tools, prices and limits",
      "readOnly": true,
      "destructive": false,
      "description": "List the tools of this server with prices, data sources, licensing, daily limits and data freshness."
    },
    {
      "name": "forecast_as_issued",
      "title": "JMA forecast as issued at a past time",
      "readOnly": true,
      "destructive": false,
      "openWorld": true,
      "description": "Archived JMA prefectural weather forecast as issued. Give an area and at (forecast in effect then) or issued_at (exact JMA issue time). Returns JMA's bulletin as published (Japanese weather text, win…"
    },
    {
      "name": "forecast_issuances",
      "title": "List of JMA forecast issuances for an area",
      "readOnly": true,
      "destructive": false,
      "openWorld": true,
      "description": "Which prefectural weather forecasts did JMA issue for an area between two times? Lists each archived issuance (JMA issue time, transmission time, our fetch time, scheduled/unscheduled/correction/canc…"
    },
    {
      "name": "get_receipt",
      "title": "Get receipt of a paid call",
      "readOnly": true,
      "destructive": false,
      "description": "Re-fetch the stored result of a settled paid call by its receipt_id, for when the response was lost after payment. Free. Unknown or unsettled receipt ids return RECEIPT_NOT_FOUND. Results are kept fo…"
    }
  ],
  "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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