# Cheapest eSIM Korea (최저가e심) (remote · pyungyo.com)

Daily verified travel eSIM/SIM prices: 54 countries, 1-30 day trips, Korean sellers. Free.

- Trust score: 78/100 (medium)
- Change this week: +3
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-11-05

## Components

- remote · `pyungyo.com`: 78/100 (this document), [markdown](https://verifymcp.io/servers/shift7667-cheapest-esim/esim-mcp.md), [page](https://verifymcp.io/servers/shift7667-cheapest-esim/esim-mcp)

## Channel facts

- Endpoint: `https://pyungyo.com/esim/mcp`
- Transports: `streamable-http`
- Auth: `none`
- Version: `1.0.0`

## 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 2026-11-05.

- **Endpoint Security**: 80/100
  - 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 is enforced; there's no plaintext access path.
  - The HSTS (Strict-Transport-Security) header is present.
  - 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**: 57/100
  - AI-judged instruction clarity (good).
  - Context-footprint check failed: tool/resource definitions use about 1114 tokens (~222/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**: 70/100
  - Stability observed for 21 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 95/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 86% 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 6 captured unit(s) of tool text and found none that tries to manipulate the model reading it.
- **Capabilities**: 60/100
  - Spec-recency check failed: implements MCP spec 2025-06-18; the latest is 2026-07-28.

## Install

### How do I install the Cheapest eSIM Korea (최저가e심) MCP server?

Cheapest eSIM Korea (최저가e심) is a hosted endpoint at https://pyungyo.com/esim/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 shift7667-cheapest-esim 'https://pyungyo.com/esim/mcp'
```

### Cursor

```json
{
  "mcpServers": {
    "shift7667-cheapest-esim": {
      "url": "https://pyungyo.com/esim/mcp"
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "shift7667-cheapest-esim": {
      "type": "http",
      "url": "https://pyungyo.com/esim/mcp"
    }
  }
}
```

### Codex

```toml
[mcp_servers.shift7667-cheapest-esim]
url = "https://pyungyo.com/esim/mcp"
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "shift7667-cheapest-esim": {
      "type": "remote",
      "url": "https://pyungyo.com/esim/mcp",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add shift7667-cheapest-esim --url 'https://pyungyo.com/esim/mcp' --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  shift7667-cheapest-esim:
    url: "https://pyungyo.com/esim/mcp"
```

### Netclaw

```json
{
  "McpServers": {
    "shift7667-cheapest-esim": {
      "Transport": "http",
      "Url": "https://pyungyo.com/esim/mcp"
    }
  }
}
```

### Vellum

```bash
assistant mcp add shift7667-cheapest-esim -t streamable-http -u 'https://pyungyo.com/esim/mcp'
```

### Other

```json
{
  "mcpServers": {
    "shift7667-cheapest-esim": {
      "type": "http",
      "url": "https://pyungyo.com/esim/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.

### 2026-11-04 (score 78, +1)

No change was recorded against any check on this day. Stability & Change Management went from 63 to 67. That category is still filling its 30-day observation window: 19 days of observed history at the previous scan, 20 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-11-02 (score 77, +1)

No change was recorded against any check on this day. Stability & Change Management went from 57 to 60. That category is still filling its 30-day observation window: 17 days of observed history at the previous scan, 18 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-31 (score 76, +1)

No change was recorded against any check on this day. Stability & Change Management went from 50 to 53. That category is still filling its 30-day observation window: 15 days of observed history at the previous scan, 16 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-29 (score 75, +1)

No change was recorded against any check on this day. Stability & Change Management went from 43 to 47. That category is still filling its 30-day observation window: 13 days of observed history at the previous scan, 14 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-27 (score 74, +1)

No change was recorded against any check on this day. Stability & Change Management went from 37 to 40. That category is still filling its 30-day observation window: 11 days of observed history at the previous scan, 12 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-25 (score 73, +1)

No change was recorded against any check on this day. Stability & Change Management went from 30 to 33. That category is still filling its 30-day observation window: 9 days of observed history at the previous scan, 10 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-23 (score 72, +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.

### 2026-10-22 (score 71, 0)

- [security] Tool “get_seller_profile” rewrote its description, which is the text the model reads

## MCP tools (5)

### `find_esim_prices` (~471 tokens)

Travel eSIM prices by country & days (나라·일수별 eSIM·유심 가격)

Verified daily prices of travel eSIMs (and physical SIMs) sold to Korean travelers on Naver SmartStore, for a destination country or major city (54 countries, e.g., japan/일본/오사카/tokyo, vietnam/베트남/다낭) and trip length (1-30 days, or Korean trip phrases like "3박 4일", "일주일", "한 달"). Returns sellers ranked by reviews (or price) and the cheapest price under the same rules as the website (pagePrice), plus cheapest daily-cap, total-cap, USIM/eSIM, and adjacent-day (N-1 / N+1 days) alternatives. Plan types: unlimited, daily (N GB/day), total (N GB total). 해외여행 eSIM(또는 실물 유심) 판매처 가격을 나라(또는 주요 도시)·이용 일수별로 조회합니다. 네이버 스마트스토어 판매처의 옵션가를 매일 수집·검증한 값이며, 판매처는 리뷰 많은 순(또는 싼 순), 화면 최저가(pagePrice)는 웹·앱 화면과 같은 규칙입니다.

Input parameters:

- `country` (string, required): 나라 또는 주요 도시 (예: japan, 일본, 오사카, tokyo, vietnam, 베트남, 다낭, 방콕, 발리)
- `days` (integer): 이용 일수 1~30 (기본 3, 예: 3박 4일 여행이면 4)
- `form` (string): esim(기본) 또는 usim(배송비 포함가)
- `gb` (number): daily: 하루 용량 0.5·1·2·3·5 / total: 총 용량 3·5·10·20·30·50
- `limit` (integer): 판매처 수 (기본 10)
- `sort` (string): 무제한 목록 정렬: reviews(리뷰 많은 순, 기본) 또는 price(싼 순)
- `type` (string): 요금제 종류: unlimited(완전 무제한, 기본), daily(하루 용량제), total(기간 총량제)

### `compare_countries` (~103 tokens)

Cheapest countries for a trip length (나라별 최저가 순위)

Ranks destination countries by the cheapest unlimited travel eSIM (or SIM) price for the same trip length. 같은 이용 일수에서 나라별 무제한 eSIM(또는 유심) 최저가를 싼 순으로 보여 줍니다 (화면 규칙).

Input parameters:

- `days` (integer): 이용 일수 (기본 3)
- `form` (string)
- `limit` (integer): 나라 수 (기본 10)

### `get_price_trend` (~123 tokens)

Recent price trend (최근 가격 추세)

Daily history of the cheapest unlimited eSIM price for a country and trip length, with a judgement of whether today is cheap compared with the recorded days. Does not forecast. 나라·일수별 무제한 최저가의 최근 일별 기록과 "지금이 싼 편인가" 판단(지난 기록 대비). 앞으로의 가격은 예측하지 않습니다.

Input parameters:

- `country` (string, required): 나라 또는 주요 도시 (예: japan, 일본, 오사카)
- `days` (integer): 기본 3
- `form` (string)

### `get_seller_profile` (~184 tokens)

Seller profile (판매처 운영 지표)

How often an eSIM seller changed prices recently (increases/decreases), its sold-out option ratio, the country/day cells where it is cheapest today, and the daily cross-check of its official website prices against Naver (today + 30-day history: match rate, days official site was cheaper). Independent comparison service, not affiliated with sellers. 판매처가 최근 가격을 얼마나 자주 바꿨는지·품절 옵션 비율, 오늘 그 판매처가 최저가인 나라·일수, 그리고 그 판매처 공식 홈페이지 가격과 네이버 값의 매일 교차 확인(오늘 + 최근 30일 이력). 최저가e심은 판매처와 관계없는 비교 서비스입니다.

Input parameters:

- `seller` (string, required): 판매처 이름 (예: 말톡, 도시락이심, 유심사스토어)

### `list_countries` (~60 tokens)

Supported countries (지원 나라 목록)

Destination countries covered (key, Korean name, number of sellers, 3-day unlimited eSIM cheapest price). 가격을 비교하는 54개국 목록 (key·한글 이름·판매처 수·3일 무제한 최저가).

## Diagnostics

Captured diagnostic sections: TLS, DNSSEC, Authorisation, Transports. The full working is on the page: https://verifymcp.io/servers/shift7667-cheapest-esim/esim-mcp#diagnostics

## Score history

- 2026-11-05: 78
- 2026-11-04: 78
- 2026-11-03: 77
- 2026-11-02: 77
- 2026-11-01: 76
- 2026-10-31: 76
- 2026-10-30: 75
- 2026-10-29: 75
- 2026-10-28: 74
- 2026-10-27: 74
- 2026-10-26: 73
- 2026-10-25: 73
- 2026-10-24: 72
- 2026-10-23: 72
- 2026-10-22: 71
- 2026-10-21: 71
- 2026-10-20: 71
- 2026-10-19: 70
- 2026-10-18: 70
- 2026-10-17: 70
- 2026-10-16: 69
- 2026-10-15: 69

## Common questions

### What is the Cheapest eSIM Korea (최저가e심) MCP server?

Cheapest eSIM Korea (최저가e심) is an MCP server listed in the public MCP registry as io.github.shift7667/cheapest-esim. Daily verified travel eSIM/SIM prices: 54 countries, 1-30 day trips, Korean sellers. Free. This page covers its hosted endpoint (https://pyungyo.com/esim/mcp).

### Is the Cheapest eSIM Korea (최저가e심) MCP server safe to use?

Cheapest eSIM Korea (최저가e심) scores 78 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 Cheapest eSIM Korea (최저가e심) MCP server expose?

Cheapest eSIM Korea (최저가e심) exposes 5 tools: find_esim_prices, compare_countries, get_price_trend, get_seller_profile, list_countries. Their descriptions and schemas cost roughly 941 tokens of context every time the server is loaded.

### Does the Cheapest eSIM Korea (최저가e심) MCP server require authentication?

No. We connected to Cheapest eSIM Korea (최저가e심) without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.

### Is the Cheapest eSIM Korea (최저가e심) MCP server still maintained?

Cheapest eSIM Korea (최저가e심) is still listed as active in the MCP registry. We last reached this channel on 5 November 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://pyungyo.com/esim/mcp
- Repository: https://github.com/shift7667/cheapest-esim-mcp
- Website: https://pyungyo.com/esim/developers
- Changelog RSS feed: https://verifymcp.io/servers/shift7667-cheapest-esim/esim-mcp.xml
- Changelog JSON feed: https://verifymcp.io/servers/shift7667-cheapest-esim/esim-mcp.json
- HTML version of this page: https://verifymcp.io/servers/shift7667-cheapest-esim/esim-mcp