# 購物比價紀錄

> 購物比價紀錄：3C、美妝、家電價格比較。台灣繁體中文 MCP 工具。

- name: com.penguindriver/shop
- version: 1.0.0
- connection class: R0 (autonomous)
- trust: 80/100 flags: no-repository
- quality: 76/100 (good)
- owner: not claimed
- descriptor: https://api.protogrid.dev/v1/servers/com.penguindriver%2Fshop
- tools: https://api.protogrid.dev/v1/servers/com.penguindriver%2Fshop/tools

**An agent can connect right now, no human step.** Remote endpoint, no authentication, reachable on the last probe.

## Connection (mcpServers)

```json
{
  "mcpServers": {
    "shop": {
      "type": "http",
      "url": "https://shop.penguindriver.com/mcp"
    }
  }
}
```


## Trust

- hygiene: 80
- liveness: 98
- freshness: 100
- provenance: 50
- drivers: +dns-namespace +website -thin-description +reachable +uptime-94% +updated-22d-ago -no-repository
- Derived from observable signals (official registry feed and our own credential-free probes); no code audit performed.

## Quality 76/100 (good)

### protocol: 75 (weight 25)

- warn `protocol.modern`: newest supported version is 2025-11-25; 2026-07-28 not supported, older versions are deprecated until 2027-07-28
- n/a `protocol.stateless`: only applies to 2026-07-28 servers
- pass `protocol.transport`: streamable HTTP
- n/a `protocol.list_ttl`: only applies to 2026-07-28 servers

### authorization: n/a (weight 15)

- n/a `auth.prm`, `auth.as_metadata`, `auth.cimd`: no remote uses OAuth
- n/a `auth.secret_in_url`: no templated URL

### tool hygiene: 64 (weight 30)

- warn `tools.descriptions`: 1 of 7 tools have a description under 20 characters
- pass `tools.description_length`: descriptions are concise
- pass `tools.schemas`: every tool has an object input schema
- fail `tools.annotations`: no tool declares readOnlyHint or destructiveHint, so clients cannot tell safe calls from risky ones
- fail `tools.directory_hints`: no tool declares all four of readOnlyHint, destructiveHint, idempotentHint and openWorldHint; missing: search_products (readOnlyHint, destructiveHint, idempotentHint, openWorldHint); list_chain_promos (readOnlyHint, destructiveHint, idempotentHint, openWorldHint); list_lowest_prices (readOnlyHint, destructiveHint, idempotentHint, openWorldHint); …
- pass `tools.token_cost`: about 301 tokens to load every tool
- pass `tools.api_dump`: tools are not a one-to-one API dump

### stability: 100 (weight 15)

- pass `stability.changes`: 5 tool changes in 30 days
- pass `stability.rug_pull`: no tool changed its meaning under the same name

### dependencies: n/a (weight 15)

- n/a `deps.known_vulns`, `deps.mcp_sdk_version`, `deps.resolvable`: no npm or PyPI package

- tools: 7, about 301 tokens to load them all
- tool set hash: 58aff1611445f086b460a060a12f555e
- tools last changed: 2026-10-05T06:55:14.131Z
- badge: [![protogrid quality](https://protogrid.dev/badge/com.penguindriver/shop.svg)](https://protogrid.dev/servers/com.penguindriver/shop)
- Checks run on what our credential-free, read-only probes observe; tools are never called and no code audit is performed.

### Tool changes

- 2026-10-05 `list_lowest_prices` added
  - 由每日記錄售價計算的紀錄期間最低價、原價折扣與各分類最低價商品。
- 2026-10-05 `compare_chain_prices` added
  - 同一商品在各連鎖通路的售價比較（輸入商品關鍵字，例如：舒酸定）。
- 2026-10-05 `list_chain_promos` added
  - 台灣熱門連鎖通路（寶雅、康是美、屈臣氏、全聯、家樂福、Costco 等）目前公開的優惠活動整理，每筆附資料來源；以官方公告為準。
- 2026-10-02 `list_price_drops` changed (inputSchema)
- 2026-10-02 `search_products` changed (inputSchema)

Full history: https://api.protogrid.dev/v1/servers/com.penguindriver%2Fshop/changes

## Remotes

- https://shop.penguindriver.com/mcp (streamable-http, auth none, reachable true, uptime30d 0.9382716)

## Packages

_none_

## Tools (7)

- `compare_chain_prices`: 同一商品在各連鎖通路的售價比較（輸入商品關鍵字，例如：舒酸定）。
- `get_product_price`: 取得單一商品的目前最低價、各商店報價，以及近 90 天最低、最高、平均價。
- `list_categories`: 列出收錄的商品分類。
- `list_chain_promos`: 台灣熱門連鎖通路（寶雅、康是美、屈臣氏、全聯、家樂福、Costco 等）目前公開的優惠活動整理，每筆附資料來源；以官方公告為準。
- `list_lowest_prices`: 由每日記錄售價計算的紀錄期間最低價、原價折扣與各分類最低價商品。
- `list_price_drops`: 列出今天降價 3% 以上或創 30 天新低的商品。
- `search_products`: 搜尋台灣購物網站商品（3C、美妝保養、家電）目前售價（新台幣），回傳商品、商店、價格與確認時間。