# Japan → Korea Bridge (npm · @appmonster/mcp-japan-bridge)

Japan→Korea sourcing: Rakuten/Yahoo search, JPY→KRW landed cost, Smart Store draft. 일본구매대행 MCP.

- Trust score: 71/100 (medium)
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-10-24

## Components

- npm · `@appmonster/mcp-japan-bridge`: 71/100 (this document), [markdown](https://verifymcp.io/servers/groove79-mcp-japan-bridge/appmonster-mcp-japan-bridge.md), [page](https://verifymcp.io/servers/groove79-mcp-japan-bridge/appmonster-mcp-japan-bridge)

## Channel facts

- Registry: `npm`
- Package: `@appmonster/mcp-japan-bridge`
- Version: `0.1.1`
- Transport: `stdio`

## Trust breakdown

How this component scores in each security and reliability category. Every signal is checked automatically from public evidence about the published package, including repeated runs of it in an isolated sandbox, 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 2026-10-24.

- **Supply Chain Security**: 81/100
  - No malware found by supply-chain analysis.
  - CVE check failed: a known high-severity CVE affects zod 3.25.76, a direct dependency. A fixed version is available.
  - No install/post-install scripts declared.
  - 30 of 93 dependencies flagged as unhealthy.
- **Provenance & Transparency**: 100/100
  - Source repository is publicly reachable at the declared URL.
  - Cryptographically verified build provenance (signed, bound to groove79/kmcp).
  - Clear OSI-approved license (MIT).
  - Actively maintained (last published 0 days ago).
  - Publishes a security disclosure policy (SECURITY.md).
- **Schema Quality & AI Usability**: 59/100
  - AI-judged instruction clarity (good).
  - Context-footprint check failed: tool/resource definitions use about 903 tokens (~180/item across 5 items; 5 tools + 0 resources), over budget; trim descriptions and params.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 0/100
  - Stability not yet verified: not enough scan history yet (needs a 30-day window).
- **Tool Coverage**: 73/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 19% of tool parameters carry a description.
- **Tool Safety**: 100/100
  - No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.
  - We read all 5 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 5 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.

**Unverified: 1 category.** A category scored 0 because we could not verify it: a data source with nothing on this package, evidence we could not reach, or a check we could not run. We only credit what we can confirm.

## Install

### How do I install the Japan → Korea Bridge MCP server?

Japan → Korea Bridge runs locally as an npm package, launched with npx -y @appmonster/mcp-japan-bridge. 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 groove79-mcp-japan-bridge -- npx -y @appmonster/mcp-japan-bridge
```

### Cursor

```json
{
  "mcpServers": {
    "groove79-mcp-japan-bridge": {
      "command": "npx",
      "args": [
        "-y",
        "@appmonster/mcp-japan-bridge"
      ]
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "groove79-mcp-japan-bridge": {
      "command": "npx",
      "args": [
        "-y",
        "@appmonster/mcp-japan-bridge"
      ]
    }
  }
}
```

### Codex

```bash
codex mcp add groove79-mcp-japan-bridge -- npx -y @appmonster/mcp-japan-bridge
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "groove79-mcp-japan-bridge": {
      "type": "local",
      "command": [
        "npx",
        "-y",
        "@appmonster/mcp-japan-bridge"
      ],
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add groove79-mcp-japan-bridge --command npx --arg -y --arg @appmonster/mcp-japan-bridge
```

### Hermes

```yaml
mcp_servers:
  groove79-mcp-japan-bridge:
    command: "npx"
    args: ["-y", "@appmonster/mcp-japan-bridge"]
```

### Netclaw

```json
{
  "McpServers": {
    "groove79-mcp-japan-bridge": {
      "Transport": "stdio",
      "Command": "npx",
      "Arguments": [
        "-y",
        "@appmonster/mcp-japan-bridge"
      ]
    }
  }
}
```

### Vellum

```bash
assistant mcp add groove79-mcp-japan-bridge -t stdio -c npx -a -y @appmonster/mcp-japan-bridge
```

### Other

```json
{
  "mcpServers": {
    "groove79-mcp-japan-bridge": {
      "command": "npx",
      "args": [
        "-y",
        "@appmonster/mcp-japan-bridge"
      ]
    }
  }
}
```

## 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.

### 2026-10-24 (score 71, +10)

- [security regression] CVE-2023-54404 affects this package: high
- [security regression] Known CVEs: pass → fail
- [security improvement] Malware scan: unverified → pass

### 2026-10-23 (score 61)

First indexed and scored.

## MCP tools (5)

### `jp_search_rakuten` (~143 tokens)

Search Rakuten Ichiba (楽天市場) products by keyword: name, JPY price, shop, image, review score, stock, postage flag, item URL. 라쿠텐 상품을 검색합니다. Use to source Japanese items for a Korean listing; pass results to jp_landed_cost. Needs a keyword; RAKUTEN_APP_ID + RAKUTEN_ACCESS_KEY env.

Input parameters:

- `hits` (integer)
- `inStockOnly` (boolean)
- `keyword` (string, required)
- `maxPrice` (integer)
- `minPrice` (integer)
- `page` (integer)
- `sort` (string)

### `jp_search_yahoo` (~143 tokens)

Search Yahoo! JAPAN Shopping products by keyword: name, JPY price, seller, image, reviews, stock, free-shipping flag, URL. 1 request/sec limit. 야후재팬 쇼핑 상품을 검색합니다. Use alongside jp_search_rakuten to compare Japanese prices. Needs a keyword; YAHOO_JP_APP_ID env.

Input parameters:

- `condition` (string)
- `inStockOnly` (boolean)
- `priceFrom` (integer)
- `priceTo` (integer)
- `query` (string, required)
- `results` (integer)
- `sort` (string)
- `start` (integer)

### `jp_fx_rate` (~78 tokens)

Current JPY→KRW and USD→KRW mid-market rates (open.er-api.com, refreshed daily) for use in jp_landed_cost. Customs uses its own weekly rate; this is for estimates. 엔·달러 환율을 가져옵니다. Use before jp_landed_cost unless you already have rates. Needs nothing.

### `jp_landed_cost` (~335 tokens)

Compute the full Korea landed cost of a Japanese item and a suggested Smart Store price: JPY→KRW, forwarder shipping, Korean customs (USD 150 de minimis, 간이세율 20% or duty+VAT), marketplace fees, target margin. Pure calculation, explains every step. 일본 상품의 한국 도착 원가와 권장 판매가를 계산합니다. Use after picking an item; give priceJpy and rates (from jp_fx_rate). Needs priceJpy, jpyToKrw, usdToKrw; optional weight, shipping, tax mode, margin.

Input parameters:

- `domesticShippingJpy` (number): JP domestic shipping to the forwarder (0 if 送料無料)
- `dutyFreeUsd` (number)
- `dutyRate` (number): HS-code duty rate for general mode (의류 13%, 일반 8%…)
- `extraKrw` (number)
- `jpyToKrw` (number, required)
- `platformFeeRate` (number): Default from env BRIDGE_PLATFORM_FEE_RATE (0.06)
- `priceJpy` (number, required)
- `quantity` (integer)
- `shippingJpy` (number): International shipping for the parcel; overrides the base+per-kg estimate
- `simpleRate` (number)
- `targetMarginRate` (number)
- `taxMode` (string): simple = 간이세율(특송/우편), general = 관세율 + 부가세
- `usdToKrw` (number, required)
- `weightKg` (number)

### `jp_listing_draft` (~204 tokens)

Build a Naver Smart Store listing draft for a Japanese item: Korean title/description slots, price from jp_landed_cost, images, origin 일본, plus the 해외구매대행 disclosures Korean law requires (shipping days, customs, no-return cases, 개인통관고유부호). Returns JSON for review — nothing is posted. 스마트스토어 등록 초안을 만듭니다. Use after jp_landed_cost; the agent writes the Korean title/description, this tool supplies structure and mandatory notices. Needs the item and the suggested price.

Input parameters:

- `categoryHint` (string)
- `descriptionKo` (string, required): Korean description written by the agent
- `item` (object, required)
- `leadTimeDays` (integer)
- `sellPriceKrw` (integer, required)
- `stockQuantity` (integer)
- `titleKo` (string, required): Korean product title written by the agent (brand + model + key spec, ≤100자)

## Diagnostics

Captured diagnostic sections: Provenance, Vulnerabilities, Dependencies. The full working is on the page: https://verifymcp.io/servers/groove79-mcp-japan-bridge/appmonster-mcp-japan-bridge#diagnostics

## Score history

- 2026-10-24: 71
- 2026-10-23: 61

## Common questions

### What is the Japan → Korea Bridge MCP server?

Japan → Korea Bridge is an MCP server listed in the public MCP registry as io.github.groove79/mcp-japan-bridge. Japan→Korea sourcing: Rakuten/Yahoo search, JPY→KRW landed cost, Smart Store draft. 일본구매대행 MCP. This page covers its npm package (@appmonster/mcp-japan-bridge).

### Is the Japan → Korea Bridge MCP server safe to use?

Japan → Korea Bridge scores 71 out of 100 on VerifyMCP. We recorded 1 known advisory against it as of 24 October 2026. It declares no install or post-install scripts. Its build provenance is signed and verified. 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 → Korea Bridge MCP server expose?

Japan → Korea Bridge exposes 5 tools: jp_search_rakuten, jp_search_yahoo, jp_fx_rate, jp_landed_cost, jp_listing_draft. Their descriptions and schemas cost roughly 903 tokens of context every time the server is loaded.

### Is the Japan → Korea Bridge MCP server still maintained?

Japan → Korea Bridge is still listed as active in the MCP registry. We last reached this channel on 24 October 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.

### What licence is the Japan → Korea Bridge MCP server under?

Japan → Korea Bridge declares the MIT licence, which is OSI-approved. That covers the source only, and says nothing about the cost of any service it calls.

## Links

- npm package: https://www.npmjs.com/package/@appmonster/mcp-japan-bridge
- Socket report: https://socket.dev/npm/package/@appmonster/mcp-japan-bridge
- Repository: https://github.com/groove79/kmcp
- Website: https://appmonster.co.kr/
- Changelog RSS feed: https://verifymcp.io/servers/groove79-mcp-japan-bridge/appmonster-mcp-japan-bridge.xml
- Changelog JSON feed: https://verifymcp.io/servers/groove79-mcp-japan-bridge/appmonster-mcp-japan-bridge.json
- HTML version of this page: https://verifymcp.io/servers/groove79-mcp-japan-bridge/appmonster-mcp-japan-bridge