# Japan Weather Forecast Archive (JMA, as issued) (remote · jp-forecast-archive-production.mk-career-planning.workers.dev)

What did Japan's weather agency forecast, as issued at a past time? Archive of JMA bulletins.

- Trust score: 67/100 (medium)
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-10-18

## Components

- remote · `jp-forecast-archive-production.mk-career-planning.workers.dev`: 67/100 (this document), [markdown](https://verifymcp.io/servers/mk-career-planning-jp-forecast-archive/jp-forecast-archive-production.md), [page](https://verifymcp.io/servers/mk-career-planning-jp-forecast-archive/jp-forecast-archive-production)

## Channel facts

- Endpoint: `https://jp-forecast-archive-production.mk-career-planning.workers.dev/mcp`
- Transports: `streamable-http`
- Auth: `none`
- Version: `0.1.0`

## Trust breakdown

How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. Scores are 0–100 per category. Scoring method: https://verifymcp.io/docs/scoring (what has changed: https://verifymcp.io/docs/scoring/changelog)

Scored 2026-10-18.

- **Endpoint Security**: 63/100
  - The endpoint's TLS certificate is valid, in date, and uses a strong key.
  - No authorisation is required to call this server. Every tool declares its destructiveHint and none is destructive, so open access doesn't expose one.
  - HTTPS enforcement could not be verified: the plaintext port answered with HTTP 406, which proves neither a plaintext path nor enforcement.
  - HSTS check failed: the Strict-Transport-Security header is absent.
  - DNSSEC check failed: this domain isn't protected by DNSSEC.
- **Transport & Reachability**: 100/100
  - Verified streamable-http transport via a live MCP handshake.
- **Schema Quality & AI Usability**: 72/100
  - AI-judged instruction clarity (excellent).
  - Context-footprint check failed: tool/resource definitions use about 678 tokens (~169/item across 4 items; 4 tools + 0 resources), over budget; trim descriptions and params.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 3/100
  - Stability observed for 1 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 100/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 100% of tool parameters carry a description.
  - Structured output schemas are declared (100% of tools); any adoption earns full credit.
- **Tool Safety**: 100/100
  - No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.
  - We read all 4 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 4 captured unit(s) of tool text and found none that tries to manipulate the model reading it.
- **Capabilities**: 100/100
  - Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.

## Install

### How do I install the Japan Weather Forecast Archive (JMA, as issued) MCP server?

Japan Weather Forecast Archive (JMA, as issued) is a hosted endpoint at https://jp-forecast-archive-production.mk-career-planning.workers.dev/mcp, so there is nothing to install locally. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.

### Claude

```bash
claude mcp add --transport http mk-career-planning-jp-forecast-archive 'https://jp-forecast-archive-production.mk-career-planning.workers.dev/mcp'
```

### Cursor

```json
{
  "mcpServers": {
    "mk-career-planning-jp-forecast-archive": {
      "url": "https://jp-forecast-archive-production.mk-career-planning.workers.dev/mcp"
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "mk-career-planning-jp-forecast-archive": {
      "type": "http",
      "url": "https://jp-forecast-archive-production.mk-career-planning.workers.dev/mcp"
    }
  }
}
```

### Codex

```toml
[mcp_servers.mk-career-planning-jp-forecast-archive]
url = "https://jp-forecast-archive-production.mk-career-planning.workers.dev/mcp"
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "mk-career-planning-jp-forecast-archive": {
      "type": "remote",
      "url": "https://jp-forecast-archive-production.mk-career-planning.workers.dev/mcp",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add mk-career-planning-jp-forecast-archive --url 'https://jp-forecast-archive-production.mk-career-planning.workers.dev/mcp' --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  mk-career-planning-jp-forecast-archive:
    url: "https://jp-forecast-archive-production.mk-career-planning.workers.dev/mcp"
```

### Netclaw

```json
{
  "McpServers": {
    "mk-career-planning-jp-forecast-archive": {
      "Transport": "http",
      "Url": "https://jp-forecast-archive-production.mk-career-planning.workers.dev/mcp"
    }
  }
}
```

### Vellum

```bash
assistant mcp add mk-career-planning-jp-forecast-archive -t streamable-http -u 'https://jp-forecast-archive-production.mk-career-planning.workers.dev/mcp'
```

### Other

```json
{
  "mcpServers": {
    "mk-career-planning-jp-forecast-archive": {
      "type": "http",
      "url": "https://jp-forecast-archive-production.mk-career-planning.workers.dev/mcp"
    }
  }
}
```

The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.

## Changelog

Every change recorded for this component, newest first. Days that predate change tracking, or that we cannot explain, say so: "we were watching and nothing happened" and "we were not watching" are different claims.

### 2026-10-18 (score 67, +1)

- [functional improvement] Stability: unverified → 0.03

### 2026-10-17 (score 66)

First indexed and scored.

## MCP tools (4)

### `catalog` (~27 tokens)

Catalog: tools, prices and limits

List the tools of this server with prices, data sources, licensing, daily limits and data freshness.

Output parameters:

- `daily_limits` (object): Daily limits of paid calls (calls, usd, timezone) or a misconfiguration notice.
- `fetch_status_values` (object)
- `legal` (object)
- `paused` (object): Operator pause flags (true = paused).
- `payment` (object)
- `provenance` (array): Freshness receipts for every upstream source used.
- `server` (object)
- `terms` (string): URL of the terms of service.
- `tools` (array): Every tool of this server with its price.

### `forecast_as_issued` (~278 tokens)

JMA forecast as issued at a past time

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, wind, waves, 6-hour rain probability, temperatures) with report_datetime (JMA's issue time) apart from fetched_at (ours). Status found, not_archived (before this archive started), unknown or no_issuance_at_that_time. Not the current forecast: check JMA.

Input parameters:

- `area` (string, required): JMA forecast office code (130000), sub-area code (130010), prefecture (Tokyo, 東京都, 13) or JMA area name (Kushiro Nemuro). Prefectures with several offices (Hokkaido, Kagoshima, Okinawa) need the offi…
- `at` (string): ISO 8601 date-time with time zone: return the issuance in effect at this time, e.g. 2026-10-12T09:00:00+09:00
- `issued_at` (string): ISO 8601 date-time with time zone: return the issuance with exactly this JMA issue time, e.g. 2026-10-12T05:00:00+09:00

Output parameters:

- `answered_at` (string)
- `archive` (object)
- `archive_notice` (string): Every answer is an archived issuance, not the current forecast and not a forecast made by this service.
- `attribution` (object)
- `issuance`
- `legal_notice` (string)
- `official_check` (object): Read first: this is an archive of what JMA issued; for current forecasts check the JMA pages listed here.
- `provenance` (array): Freshness receipts for every upstream source used.
- `query` (object)
- `status` (string): found = the archived issuance; not_archived = before this archive's start (JMA does not publish past forecasts); unknown = the feed was not read for part of the period or the bulletin could not be re…
- `status_note` (string)
- `terms` (string): URL of the terms of service.

### `forecast_issuances` (~290 tokens)

List of JMA forecast issuances for an area

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/cancellation, bulletin URL and SHA-256) with coverage gaps where JMA's feed could not be read. Free window: last 30 days (an earlier since is clamped; see history_window). Use forecast_as_issued for the content. An archive, not a forecast service.

Input parameters:

- `area` (string, required): JMA forecast office code (130000), sub-area code (130010), prefecture (Tokyo, 東京都, 13) or JMA area name (Kushiro Nemuro). Prefectures with several offices (Hokkaido, Kagoshima, Okinawa) need the offi…
- `limit` (integer): Maximum number of issuances, 1-500 (default 100)
- `since` (string, required): Issuances after this: ISO 8601 date (00:00 Japan time) or date-time with time zone, e.g. 2026-10-12 or 2026-10-12T05:00:00+09:00
- `until` (string): Optional end: ISO 8601 date (00:00 Japan time) or date-time with time zone (default now)

Output parameters:

- `answered_at` (string)
- `archive` (object)
- `archive_notice` (string): Every answer is an archived issuance, not the current forecast and not a forecast made by this service.
- `attribution` (object)
- `coverage` (object)
- `history_window` (object): Free history window applied to this answer.
- `issuances` (array): JMA issuances held for this office, oldest first.
- `legal_notice` (string)
- `official_check` (object): Read first: this is an archive of what JMA issued; for current forecasts check the JMA pages listed here.
- `provenance` (array): Freshness receipts for every upstream source used.
- `query` (object)
- `terms` (string): URL of the terms of service.
- `truncated` (boolean)

### `get_receipt` (~83 tokens)

Get receipt of a paid call

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 for 90 days after settlement.

Input parameters:

- `receipt_id` (string, required): The receipt_id returned with a paid result ("rcpt_" + 64 hex characters).

Output parameters:

- `payment` (object)
- `provenance` (array): Freshness receipts for every upstream source used.
- `receipt_id` (string): Receipt id of the settled paid call ("rcpt_" + 64 hex). Use with get_receipt.
- `result`: The stored result, exactly as returned by the paid call.
- `settled_at` (string|null)
- `terms` (string): URL of the terms of service.
- `tool` (string): Name of the paid tool that produced the result.

## Diagnostics

Captured diagnostic sections: TLS, DNSSEC, Authorisation, Transports. The full working is on the page: https://verifymcp.io/servers/mk-career-planning-jp-forecast-archive/jp-forecast-archive-production#diagnostics

## Score history

- 2026-10-18: 67
- 2026-10-17: 66

## Common questions

### What is the Japan Weather Forecast Archive (JMA, as issued) MCP server?

Japan Weather Forecast Archive (JMA, as issued) is an MCP server listed in the public MCP registry as io.github.mk-career-planning/jp-forecast-archive. What did Japan's weather agency forecast, as issued at a past time? Archive of JMA bulletins. This page covers its hosted endpoint (https://jp-forecast-archive-production.mk-career-planning.workers.dev/mcp).

### Is the Japan Weather Forecast Archive (JMA, as issued) MCP server safe to use?

Japan Weather Forecast Archive (JMA, as issued) scores 67 out of 100 on VerifyMCP. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.

### What tools does the Japan Weather Forecast Archive (JMA, as issued) MCP server expose?

Japan Weather Forecast Archive (JMA, as issued) exposes 4 tools: catalog, forecast_as_issued, forecast_issuances, get_receipt. Their descriptions and schemas cost roughly 678 tokens of context every time the server is loaded.

### Does the Japan Weather Forecast Archive (JMA, as issued) MCP server require authentication?

No. We connected to Japan Weather Forecast Archive (JMA, as issued) without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.

### Is the Japan Weather Forecast Archive (JMA, as issued) MCP server still maintained?

Japan Weather Forecast Archive (JMA, as issued) is still listed as active in the MCP registry. We last reached this channel on 18 October 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.

## Links

- Remote endpoint: https://jp-forecast-archive-production.mk-career-planning.workers.dev/mcp
- Website: https://jp-forecast-archive-production.mk-career-planning.workers.dev/llms.txt
- Changelog RSS feed: https://verifymcp.io/servers/mk-career-planning-jp-forecast-archive/jp-forecast-archive-production.xml
- Changelog JSON feed: https://verifymcp.io/servers/mk-career-planning-jp-forecast-archive/jp-forecast-archive-production.json
- HTML version of this page: https://verifymcp.io/servers/mk-career-planning-jp-forecast-archive/jp-forecast-archive-production