# Korea & Asia Everyday Calculators (kWhmate) (remote · kwhmate.com)

Free calculators with sources: electricity bills (KR/TW/PH/JP), Korea taxi fares, tax refunds.

- Trust score: 59/100 (low)
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-10-18

## Components

- remote · `kwhmate.com`: 59/100 (this document), [markdown](https://verifymcp.io/servers/com-kwhmate-calculators/api-mcp.md), [page](https://verifymcp.io/servers/com-kwhmate-calculators/api-mcp)

## Channel facts

- Endpoint: `https://kwhmate.com/api/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 2026-10-18.

- **Endpoint Security**: 57/100
  - The endpoint's TLS certificate is valid, in date, and uses a strong key.
  - Authorisation not fully verified: no authorisation is required to call this server, and 1 tool(s) never declared a destructiveHint. The MCP spec treats an absent hint as destructive by default, so we cannot call this surface safe.
  - HTTPS is enforced; there's no plaintext access path.
  - 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**: 55/100
  - AI-judged instruction clarity (good).
  - Context-footprint check failed: tool/resource definitions use about 2927 tokens (~154/item across 19 items; 19 tools + 0 resources), over budget; trim descriptions and params.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 10/100
  - Stability observed for 3 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 80/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 40% of tool parameters carry a description.
- **Tool Safety**: 75/100
  - No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.
  - 0 of 1 tool(s) whose name or description implies an irreversible operation declare an MCP destructiveHint annotation; "korea_tax_refund" implies "refund" and declares readOnlyHint instead, contradicting what its own name says it does.
  - An AI judge read all 20 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 Korea & Asia Everyday Calculators (kWhmate) MCP server?

Korea & Asia Everyday Calculators (kWhmate) is a hosted endpoint at https://kwhmate.com/api/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 com-kwhmate-calculators 'https://kwhmate.com/api/mcp'
```

### Cursor

```json
{
  "mcpServers": {
    "com-kwhmate-calculators": {
      "url": "https://kwhmate.com/api/mcp"
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "com-kwhmate-calculators": {
      "type": "http",
      "url": "https://kwhmate.com/api/mcp"
    }
  }
}
```

### Codex

```toml
[mcp_servers.com-kwhmate-calculators]
url = "https://kwhmate.com/api/mcp"
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "com-kwhmate-calculators": {
      "type": "remote",
      "url": "https://kwhmate.com/api/mcp",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add com-kwhmate-calculators --url 'https://kwhmate.com/api/mcp' --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  com-kwhmate-calculators:
    url: "https://kwhmate.com/api/mcp"
```

### Netclaw

```json
{
  "McpServers": {
    "com-kwhmate-calculators": {
      "Transport": "http",
      "Url": "https://kwhmate.com/api/mcp"
    }
  }
}
```

### Vellum

```bash
assistant mcp add com-kwhmate-calculators -t streamable-http -u 'https://kwhmate.com/api/mcp'
```

### Other

```json
{
  "mcpServers": {
    "com-kwhmate-calculators": {
      "type": "http",
      "url": "https://kwhmate.com/api/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.

### 2026-10-17 (score 59, +1)

No change was recorded against any check on this day. Stability & Change Management went from 3 to 7. That category is still filling its 30-day observation window: 1 days of observed history at the previous scan, 2 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-16 (score 58, 0)

- [functional improvement] Stability: unverified → 0.03

### 2026-10-15 (score 58)

First indexed and scored.

## MCP tools (19)

### `kr_electricity` (~115 tokens)

Korea household electricity bill (KEPCO residential low-voltage, progressive tiers)

Korea household electricity bill (KEPCO residential low-voltage, progressive tiers). Same code as https://kwhmate.com/ko/electricity-bill/. Reference: 기준: 2026년 4분기 요금 · 출처: 한국전력공사 주택용 전력(저압) 요금표. Returns an estimate with the source and page URL.

Input parameters:

- `kwh` (number, required): Monthly usage in kWh
- `season` (string): summer = July–August tiers

### `kr_led_savings` (~184 tokens)

Korea LED replacement savings (household tiers or shop unit price)

Korea LED replacement savings (household tiers or shop unit price). Same code as https://kwhmate.com/ko/led-savings/. Reference: 기준: 2026년 한전 주택용 저압 요금표(기타 계절) · 가게·사무실은 고지서 단가 직접 입력. Returns an estimate with the source and page URL.

Input parameters:

- `count` (integer)
- `hours_per_day` (number)
- `led_cost` (number)
- `mode` (string): home = KEPCO progressive tiers, shop = unit_price × kWh
- `new_watts` (number)
- `old_watts` (number)
- `other_kwh` (number): home: monthly use without these lights
- `unit_price` (number): shop: KRW per kWh

### `tw_electricity` (~128 tokens)

Taiwan electricity bill (Taipower residential progressive rates)

Taiwan electricity bill (Taipower residential progressive rates). Same code as https://kwhmate.com/tw/electricity-bill/. Reference: 依據：台灣電力公司 2025年10月1日起實施之住宅用累進電價（2026年電價審議會凍漲）. Returns an estimate with the source and page URL.

Input parameters:

- `bimonthly` (boolean): two-month bill (brackets doubled)
- `kwh` (number, required)
- `summer` (boolean): June–September rates

### `tw_led_savings` (~162 tokens)

Taiwan LED replacement savings (Taipower non-summer, monthly brackets)

Taiwan LED replacement savings (Taipower non-summer, monthly brackets). Same code as https://kwhmate.com/tw/led-savings/. Reference: 依據：台電住宅用累進電價（非夏月、單月級距）. Returns an estimate with the source and page URL.

Input parameters:

- `count` (integer): Number of lights
- `hours_per_day` (number)
- `led_cost` (number): Total cost of the LEDs (optional, for payback)
- `new_watts` (number): Watts of one LED
- `old_watts` (number): Watts of one old bulb/tube
- `other_kwh` (number): Other monthly household use without these lights (kWh)

### `ph_meralco` (~82 tokens)

Philippines Meralco bill (this month's residential rate)

Philippines Meralco bill (this month's residential rate). Same code as https://kwhmate.com/ph/meralco-bill-calculator/. Reference: Source: Meralco rate announcement for October 2026 · lifeline discounts and local taxes not included. Returns an estimate with the source and page URL.

Input parameters:

- `kwh` (number, required)

### `ph_led_savings` (~146 tokens)

Philippines LED replacement savings (Meralco rates)

Philippines LED replacement savings (Meralco rates). Same code as https://kwhmate.com/ph/led-savings/. Reference: Rates: Meralco residential rates, October 2026. Returns an estimate with the source and page URL.

Input parameters:

- `count` (integer): Number of lights
- `hours_per_day` (number)
- `led_cost` (number): Total cost of the LEDs (optional, for payback)
- `new_watts` (number): Watts of one LED
- `old_watts` (number): Watts of one old bulb/tube
- `other_kwh` (number): Other monthly household use without these lights (kWh)

### `jp_electricity` (~141 tokens)

Japan electricity bill (TEPCO Juryo Dento B)

Japan electricity bill (TEPCO Juryo Dento B). Same code as https://kwhmate.com/jp/electricity-bill/. Reference: 出典：東京電力エナジーパートナー「従量電灯B・C」・燃料費調整単価等一覧、経済産業省「2026年度の賦課金単価」. Returns an estimate with the source and page URL.

Input parameters:

- `amperes` (integer)
- `fuel_adjustment` (number): Fuel cost adjustment, yen per kWh (default: this month)
- `kwh` (number, required)

### `jp_led_savings` (~163 tokens)

Japan LED replacement savings (TEPCO Juryo Dento B, 30 A)

Japan LED replacement savings (TEPCO Juryo Dento B, 30 A). Same code as https://kwhmate.com/jp/led-savings/. Reference: 出典：東京電力エナジーパートナー「従量電灯B」. Returns an estimate with the source and page URL.

Input parameters:

- `count` (integer): Number of lights
- `hours_per_day` (number)
- `led_cost` (number): Total cost of the LEDs (optional, for payback)
- `new_watts` (number): Watts of one LED
- `old_watts` (number): Watts of one old bulb/tube
- `other_kwh` (number): Other monthly household use without these lights (kWh)

### `seoul_taxi` (~126 tokens)

Seoul taxi fare (regular mid-size taxi meter estimate)

Seoul taxi fare (regular mid-size taxi meter estimate). Same code as https://koreasurvivalkit.com/taxi-fare-calculator/. Reference: Source: Seoul Metropolitan Government, mid-size taxi fares in effect since 1 February 2023 (checked September 2026). Returns an estimate with the source and page URL.

Input parameters:

- `hour` (integer): Departure hour (late-night surcharge)
- `km` (number, required)
- `outside_seoul` (boolean)
- `slow_traffic_minutes` (number): Minutes at 15 km/h or less

### `busan_taxi` (~114 tokens)

Busan taxi fare (regular mid-size taxi meter estimate)

Busan taxi fare (regular mid-size taxi meter estimate). Same code as https://koreasurvivalkit.com/busan-taxi-fare-calculator/. Reference: Source: Busan Metropolitan City, taxi fares in effect since 1 June 2023 (checked September 2026). Returns an estimate with the source and page URL.

Input parameters:

- `hour` (integer)
- `km` (number, required)
- `outside_busan` (boolean)
- `slow_traffic_minutes` (number)

### `korea_tax_refund` (~115 tokens)

Korea tourist tax (VAT) refund estimate

Korea tourist tax (VAT) refund estimate. Same code as https://koreasurvivalkit.com/tax-refund-calculator/. Reference: Sources checked October 2026: VISITKOREA, Korea.net, Incheon Airport, Visit Seoul. Returns an estimate with the source and page URL.

Input parameters:

- `amounts` (array, required): Receipt amounts in KRW (one per store receipt)
- `stay_days` (integer)
- `store` (string): instant = store offers instant refund at the till

### `suneung_score` (~154 tokens)

수능 표준점수·등급 (Korean CSAT standard score and grade)

수능 표준점수·등급 (Korean CSAT standard score and grade). Same code as https://gyesanmate.com/suneung-score/. Reference: 기준: 2027학년도 수능(한국교육과정평가원) · 실제 등급컷은 해마다 채점 결과로 달라짐. Returns an estimate with the source and page URL.

Input parameters:

- `english_raw` (number)
- `mean` (number)
- `percentile` (number)
- `raw` (number)
- `sd` (number)
- `subject` (string): main = 국어·수학, inquiry = 탐구·제2외국어/한문

### `naesin_grade` (~136 tokens)

내신 등급 (Korean high-school class rank → grade, 5- or 9-grade system)

내신 등급 (Korean high-school class rank → grade, 5- or 9-grade system). Same code as https://gyesanmate.com/naesin-grade/. Reference: 기준: 고교 내신 상대평가 누적 비율 · 최종 등급은 학교 성적표 기준. Returns an estimate with the source and page URL.

Input parameters:

- `rank` (integer, required)
- `students` (integer, required)
- `system` (string): five = 2025 입학생부터, nine = 2024 이전
- `ties` (integer): 동석차 수(본인 포함)

### `gpa_converter` (~116 tokens)

학점 비례 환산 (GPA scale conversion 4.5 / 4.3 / 4.0)

학점 비례 환산 (GPA scale conversion 4.5 / 4.3 / 4.0). Same code as https://gyesanmate.com/gpa-converter/. Reference: 기준: 단순 비례 환산(참고용) · 학교·기업마다 환산식이 다르므로 지원처 기준이 우선. Returns an estimate with the source and page URL.

Input parameters:

- `from_scale` (number)
- `score` (number, required)
- `to_scale` (number)

### `student_loan` (~162 tokens)

학자금대출 상환 (Korean student loan: standard repayment or income-contingent ICL)

학자금대출 상환 (Korean student loan: standard repayment or income-contingent ICL). Same code as https://gyesanmate.com/student-loan-repayment/. Reference: 출처: 교육부고시 제2026-12호(2026학년도 2학기, 시행 2026.7.1) · 상환율은 최신 공지 확인. Returns an estimate with the source and page URL.

Input parameters:

- `defer_years` (integer)
- `degree` (string)
- `gross_salary` (number): icl: annual gross salary
- `principal` (number)
- `rate_percent` (number)
- `repay_years` (integer)
- `type` (string)

### `education_tax_credit` (~144 tokens)

교육비 세액공제 (Korean education expense tax credit, 2026 spending)

교육비 세액공제 (Korean education expense tax credit, 2026 spending). Same code as https://gyesanmate.com/education-tax-credit/. Reference: 출처: 소득세법 제59조의4, 2025년 세법개정(2025.12 국회 통과). Returns an estimate with the source and page URL.

Input parameters:

- `decided_tax` (number): Expected decided tax (credit is capped at this)
- `items` (array, required): Per person: "kind:spend" in GET (e.g. school:3500000,college:8000000) or [{kind, spend}] in JSON

### `gap_investment` (~180 tokens)

갭투자 실투자금 (Korean "gap" investment: acquisition tax, brokerage, cash needed)

갭투자 실투자금 (Korean "gap" investment: acquisition tax, brokerage, cash needed). Same code as https://gyesanmate.com/gap-investment/. Reference: 출처: 지방세법 제13조의2(시행 2026.1.1)·제151조 · 1주택 세율·중개보수는 최신 공지 확인 · 투자 권유 아님. Returns an estimate with the source and page URL.

Input parameters:

- `adjusted_area` (boolean)
- `growth_percent` (number)
- `houses` (integer): Number of homes after buying
- `jeonse` (number, required)
- `other_costs` (number)
- `over_85m2` (boolean)
- `price` (number, required)
- `years` (number)

### `report_reward` (~214 tokens)

신고 포상금·보상금 (Korean whistleblower rewards: tax evasion, hidden assets, card refusal, public interest, corruption)

신고 포상금·보상금 (Korean whistleblower rewards: tax evasion, hidden assets, card refusal, public interest, corruption). Same code as https://gyesanmate.com/reward/calculator/. Reference: 확인일 2026-10-12 · 출처: 국세기본법 시행령 제65조의4, 공익신고자 보호법 시행령 제22조, 부패방지권익위법 시행령 제77조 · 참고용 추정치. Returns an estimate with the source and page URL.

Input parameters:

- `amount` (number, required): KRW amount the reward is based on
- `kind` (string): evasion = 탈세 제보(탈루세액등), hidden = 은닉재산(징수금액), card = 카드 결제 거부·현금영수증 미발급(거부금액), public = 공익신고, corruption = 부패신고(회복·증대 금액)

### `travel_budget` (~317 tokens)

국내 여행 예산 (Korea domestic trip budget: transport, stay, food, admission ranges)

국내 여행 예산 (Korea domestic trip budget: transport, stay, food, admission ranges). Same code as https://gyesanmate.com/travel-budget/. Reference: 확인일 KTX 2026-10-12·고속버스 2026-10-13 · 출처: 국토교통부 발표(KTX), KOBUS 시간표조회(고속버스) · 결과는 추정치. Returns an estimate with the source and page URL.

Input parameters:

- `admission_max` (number)
- `admission_min` (number)
- `bus_grade` (string): Express bus class (normal / deluxe 우등 / premium 프리미엄) for the built-in Seoul routes
- `car_km` (number)
- `car_km_per_l` (number)
- `fare` (number): One-way fare per person you checked (empty = built-in fare: KTX Seoul–Busan and Yongsan–Gwangju-Songjeong base fares, and 9 Seoul express-bus routes from KOBUS)
- `food_max` (number)
- `food_min` (number)
- `from` (string)
- `fuel_price` (number)
- `mode` (string)
- `nights` (integer)
- `people` (integer)
- `rooms` (integer)
- `stay_max` (number)
- `stay_min` (number)
- `to` (string)
- `toll` (number)

## Diagnostics

Captured diagnostic sections: TLS, DNSSEC, Authorisation, Transports. The full working is on the page: https://verifymcp.io/servers/com-kwhmate-calculators/api-mcp#diagnostics

## Score history

- 2026-10-18: 59
- 2026-10-17: 59
- 2026-10-16: 58
- 2026-10-15: 58

## Common questions

### What is the Korea & Asia Everyday Calculators (kWhmate) MCP server?

Korea & Asia Everyday Calculators (kWhmate) is an MCP server listed in the public MCP registry as com.kwhmate/calculators. Free calculators with sources: electricity bills (KR/TW/PH/JP), Korea taxi fares, tax refunds. This page covers its hosted endpoint (https://kwhmate.com/api/mcp).

### Is the Korea & Asia Everyday Calculators (kWhmate) MCP server safe to use?

Korea & Asia Everyday Calculators (kWhmate) scores 59 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 Korea & Asia Everyday Calculators (kWhmate) MCP server expose?

Korea & Asia Everyday Calculators (kWhmate) exposes 19 tools: kr_electricity, kr_led_savings, tw_electricity, tw_led_savings, ph_meralco, and 14 more. Their descriptions and schemas cost roughly 2,899 tokens of context every time the server is loaded.

### Does the Korea & Asia Everyday Calculators (kWhmate) MCP server require authentication?

No. We connected to Korea & Asia Everyday Calculators (kWhmate) without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.

### Is the Korea & Asia Everyday Calculators (kWhmate) MCP server still maintained?

Korea & Asia Everyday Calculators (kWhmate) 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://kwhmate.com/api/mcp
- Website: https://kwhmate.com/developers/
- Changelog RSS feed: https://verifymcp.io/servers/com-kwhmate-calculators/api-mcp.xml
- Changelog JSON feed: https://verifymcp.io/servers/com-kwhmate-calculators/api-mcp.json
- HTML version of this page: https://verifymcp.io/servers/com-kwhmate-calculators/api-mcp