# 不動産情報サービス MCP (remote · mcp.n-3.ai)

国土交通省の不動産情報ライブラリから不動産価格データを取得するためのサービスです。

- Trust score: 65/100 (medium)
- Change this week: +5
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-08-03

## Components

- remote · `mcp.n-3.ai`: 65/100 (this document), [markdown](https://verifymcp.io/servers/n-3inc-reinfo/mcp.md), [page](https://verifymcp.io/servers/n-3inc-reinfo/mcp)

## Channel facts

- Endpoint: `https://mcp.n-3.ai/mcp?tools=get-time,reinfolib-real-estate-price,reinfolib-city-list`
- Transports: `streamable-http`
- Auth: `none`
- Version: `0.0.1`

## 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 2026-08-03.

- **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 not yet verified: we couldn't determine whether a plaintext access path exists.
  - 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**: 53/100
  - AI-judged instruction clarity (good).
  - Context-footprint check failed: tool/resource definitions use about 1138 tokens (~379/item across 3 items; 3 tools + 0 resources), over budget; trim descriptions and params.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 27/100
  - Stability observed for 8 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.
- **Capabilities**: 100/100
  - Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.

## Install

### Claude

```bash
claude mcp add --transport http n-3inc-reinfo https://mcp.n-3.ai/mcp?tools=get-time,reinfolib-real-estate-price,reinfolib-city-list
```

### Codex

```toml
[mcp_servers.n-3inc-reinfo]
url = "https://mcp.n-3.ai/mcp?tools=get-time,reinfolib-real-estate-price,reinfolib-city-list"
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "n-3inc-reinfo": {
      "type": "remote",
      "url": "https://mcp.n-3.ai/mcp?tools=get-time,reinfolib-real-estate-price,reinfolib-city-list",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add n-3inc-reinfo --url https://mcp.n-3.ai/mcp?tools=get-time,reinfolib-real-estate-price,reinfolib-city-list --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  n-3inc-reinfo:
    url: "https://mcp.n-3.ai/mcp?tools=get-time,reinfolib-real-estate-price,reinfolib-city-list"
```

### Other

```json
{
  "mcpServers": {
    "n-3inc-reinfo": {
      "type": "http",
      "url": "https://mcp.n-3.ai/mcp?tools=get-time,reinfolib-real-estate-price,reinfolib-city-list"
    }
  }
}
```

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.

### 2026-08-03 (score 65, +1)

No change was recorded against any check on this day. Stability & Change Management went from 23 to 27. That category is still filling its 30-day observation window: 7 days of observed history at the previous scan, 8 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-08-01 (score 64, +2)

- [functional] We updated how we score, so this day's move reflects our rubric, not a change to the server

### 2026-07-30 (score 62, +1)

- [functional] We updated how we score, so this day's move reflects our rubric, not a change to the server

### 2026-07-29 (score 61, +1)

No change was recorded against any check on this day. Stability & Change Management went from 7 to 10. That category is still filling its 30-day observation window: 2 days of observed history at the previous scan, 3 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-07-27 (score 60, +1)

- [functional] We updated how we score, so this day's move reflects our rubric, not a change to the server

### 2026-07-26 (score 59)

First indexed and scored.

## MCP tools (3)

### `get-time` (~141 tokens)

時刻取得 / Get Current Time

指定したタイムゾーンの現在時刻を取得します。フォーマット文字列には date-fns の形式を使用します（例: 'yyyy-MM-dd HH:mm:ss', 'yyyy年MM月dd日 HH時mm分ss秒'）。24時間表記には 'HH' を使用してください。

Input parameters:

- `formatStr` (string): フォーマット文字列 (date-fns形式。省略時: 'yyyy-MM-dd HH:mm:ss')
- `timezone` (string): タイムゾーン (IANA 形式。例: 'Asia/Tokyo'。省略時: Asia/Tokyo)

Output parameters:

- `time` (string): フォーマット済みの現在時刻
- `timezone` (string): 使用したタイムゾーン

### `reinfolib-real-estate-price` (~581 tokens)

不動産価格情報取得 / Real Estate Price Information

国土交通省の不動産情報ライブラリから不動産価格（取引価格・成約価格）情報を取得します。取引時期、地域（都道府県、市区町村、駅）などを指定して検索することが可能。市区町村コードは reinfolib-city-list ツールで取得できます。

Input parameters:

- `area` (string): 都道府県コード: 北海道=01, 青森県=02, 岩手県=03, 宮城県=04, 秋田県=05, 山形県=06, 福島県=07, 茨城県=08, 栃木県=09, 群馬県=10, 埼玉県=11, 千葉県=12, 東京都=13, 神奈川県=14, 新潟県=15, 富山県=16, 石川県=17, 福井県=18, 山梨県=19, 長野県=20, 岐阜県=21, 静岡県=22, 愛知県=23, 三重県=2…
- `city` (string): 市区町村コード (5桁)
- `language` (string): 出力結果の言語 (ja:日本語, en:英語)
- `limit` (integer): 取得件数 (デフォルト: 10件)
- `priceClassification` (string): 価格情報区分コード (01:不動産取引価格情報, 02:成約価格情報)
- `quarter` (string): 取引時期(四半期) (1:1月〜3月, 2:4月〜6月, 3:7月〜9月, 4:10月〜12月)
- `station` (string): 駅コード (6桁)
- `year` (string, required): 取引時期(年) (形式: YYYY)

Output parameters:

- `data` (array): 不動産価格情報リスト（値が空のフィールドは省略される）
- `returnedCount` (number): 今回返した件数
- `totalCount` (number): 検索条件に該当した全件数
- `truncated` (boolean): true の場合、limit を超える結果が省略されている。limit の引き上げ（最大100）または quarter・city・station での絞り込みで全量を取得できる

### `reinfolib-city-list` (~416 tokens)

都道府県内の市区町村一覧取得 / City List in Prefecture

国土交通省の不動産情報ライブラリから都道府県内の市区町村一覧を取得します。都道府県コードを指定して検索します。ここで得た市区町村コード（id）は reinfolib-real-estate-price の city 引数に渡せます。

Input parameters:

- `area` (string, required): 都道府県コード: 北海道=01, 青森県=02, 岩手県=03, 宮城県=04, 秋田県=05, 山形県=06, 福島県=07, 茨城県=08, 栃木県=09, 群馬県=10, 埼玉県=11, 千葉県=12, 東京都=13, 神奈川県=14, 新潟県=15, 富山県=16, 石川県=17, 福井県=18, 山梨県=19, 長野県=20, 岐阜県=21, 静岡県=22, 愛知県=23, 三重県=2…
- `language` (string): 出力結果の言語 (ja:日本語, en:英語)

Output parameters:

- `data` (array): 市区町村一覧

## Diagnostics

Captured diagnostic sections: TLS, DNSSEC, Authorisation, Transports. The full working is on the page: https://verifymcp.io/servers/n-3inc-reinfo/mcp#diagnostics

## Score history

- 2026-08-03: 65
- 2026-08-02: 64
- 2026-08-01: 64
- 2026-07-30: 62
- 2026-07-29: 61
- 2026-07-28: 60
- 2026-07-27: 60
- 2026-07-26: 59

## Links

- Remote endpoint: https://mcp.n-3.ai/mcp?tools=get-time,reinfolib-real-estate-price,reinfolib-city-list
- Website: https://n-3.ai/apps/reinfo-agent
- Changelog RSS feed: https://verifymcp.io/servers/n-3inc-reinfo/mcp/changelog.xml
- Changelog JSON feed: https://verifymcp.io/servers/n-3inc-reinfo/mcp/changelog.json
- HTML version of this page: https://verifymcp.io/servers/n-3inc-reinfo/mcp