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Gongsijiga Search

nomadamas/k-skill
515 installs5.3k stars
Summary

Queries South Korea's official individual land valuations (개별공시지가) from the Ministry of Land's database, the legal basis for property tax, capital gains tax, and other levies. You give it a full Korean address down to the jibun, it returns the per-square-meter price, multi-year trends, and year-over-year changes. This is government assessment data, not market prices or transaction values, so it's strictly for tax calculations or understanding the official floor. Works directly against realtyprice.kr without needing API keys. The workflow is clear about when not to use it: if someone asks for actual market prices or apartment valuations, you need a different source entirely.

Install to Claude Code

npx -y skills add nomadamas/k-skill --skill gongsijiga-search --agent claude-code

Installs into .claude/skills of the current project.

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Files
SKILL.mdView on GitHub

개별공시지가 조회

What this skill does

한국 국토교통부 부동산공시가격알리미(realtyprice.kr)에서 특정 필지의 개별공시지가(원/㎡)를 조회한다. 다년도 추이(최근 5년 이내)와 전년 대비 변동률을 정규화된 JSON으로 반환한다.

공시지가는 매년 1월 1일 기준, 4~5월 공시. 세금(재산세, 종합부동산세, 양도소득세) 산정의 법적 기준 단가다.

When to use

  • "서울 강남구 역삼동 736 공시지가 알려줘"
  • "전라남도 무안군 청계면 청천리 100번지 개별공시지가"
  • "서초동 산 1-2 공시지가 추이"
  • 세무 계산에서 토지 공시 단가가 필요할 때

When NOT to use

  • 시세, 실거래가, 매매가, 호가 → 다른 데이터 소스 필요
  • 공동주택가격, 표준지공시지가, 단독주택가격 → 별도 스킬
  • 토지이용계획 → eum.go.kr 별도 스킬

Prerequisites

  • 인터넷 연결
  • curl (또는 HTTP 호출 도구)

사용자에게 필요한 시크릿 없음 (공개 데이터).

Default path

gongsijiga-search npm 패키지를 직접 호출한다. realtyprice.kr는 API 키가 필요 없는 공개 엔드포인트이므로 k-skill-proxy를 경유하지 않는다.

설치:

npm install gongsijiga-search

호출:

node -e "
const { lookupGongsijiga } = require('gongsijiga-search');
lookupGongsijiga('서울 강남구 역삼동 736').then(console.log).catch(console.error);
"

Workflow

1. 사용자 입력 수집

사용자에게 시도 + 시군구 + 읍면동 + 지번이 포함된 주소를 요청한다.

  • 최소 필수: 시도, 시군구, 읍면동, 본번
    • 세종특별자치시는 시군구가 없으므로 "세종 [읍면동] [지번]" 형식
  • 산 지번이면 "산" 키워드 포함
  • 부번이 있으면 "100-5" 형식

예시: "서울 강남구 역삼동 736", "전남 무안군 청계면 청천리 산 1-2", "세종 고용동 100"

시도가 누락된 주소(예: "역삼동 736")는 조회 불가 — 시도를 물어본다.

2. 직접 호출

gongsijiga-search 모듈을 사용해 realtyprice.kr를 직접 호출한다 (API 키 불필요, 프록시 경유 안 함):

const { lookupGongsijiga } = require('gongsijiga-search');

const result = await lookupGongsijiga('서울 강남구 역삼동 736');

3. 응답 해석 및 출력

성공 응답 예시:

{
  "address": "서울 강남구 역삼동 736",
  "jibun": "736번지",
  "san": false,
  "latest": {
    "year": 2026,
    "price_per_sqm": 72340000,
    "notice_date": "2026-04-30",
    "base_date": "2026-01-01"
  },
  "history": [...],
  "yoy_change_pct": 5.45,
  "source_url": "https://www.realtyprice.kr/notice/gsindividual/search.htm"
}

출력 규칙:

  1. 반드시 "공시지가" 단어 사용. "가격/시세/매매가" 단어 금지.
  2. 헤더: [정부 공시] 개별공시지가 — {address}
  3. 최신값: {year}년 공시지가: {price_per_sqm:,}원/㎡ (전년 대비 +{yoy_change_pct}%)
  4. 추이 표 (history 배열을 연도순 테이블로):
연도공시지가 (원/㎡)공시일
202672,340,0002026-04-30
.........
  1. 마지막 줄 disclaimer: 본 단가는 세금 산정용 정부 공시 가격으로, 시세나 실거래가와 다릅니다.

4. 올해 미발표 안내

latest.year가 올해보다 작으면: "올해 공시지가는 아직 미발표 상태입니다. 최신 데이터는 {latest.year}년 기준입니다." 안내.

Failure modes

error.code의미행동
ADDRESS_PARSE_FAILED주소 파싱 실패"행정구역 + 본번까지 포함된 주소가 필요합니다" + 예시
INVALID_BUNJI본번 형식 오류본번 입력 형식 재요청
REGION_NOT_FOUND행정구역 매칭 실패candidates 배열이 있으면 제안, 없으면 오타 확인 요청
LAND_NOT_FOUND해당 지번 미등재"본번/부번 오타이거나 도로/하천 등 미과세 토지" 설명
UPSTREAM_ERRORrealtyprice.kr 장애"데이터 출처 일시 장애. 잠시 후 재시도" + source_url
UPSTREAM_TIMEOUT30초 초과UPSTREAM_ERROR와 동일

Notes

  • 공시지가 ≠ 시세. 시세는 통상 공시지가의 1.5~3배.
  • 매년 1월 1일 기준, 45월 발표. 14월은 전년도가 최신.
  • realtyprice.kr는 API 키 불필요 (공개 데이터).
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First SeenJun 3, 2026
View on GitHub

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