seoul-individual-land-price-mcp: Instructions file for Claude Code

CLAUDE.md

seoul-individual-land-price-mcp CLAUDE.md is an instructions file for Claude Code from hlucent/seoul-individual-land-price-mcp. It costs 1,168 tokens per session, scanned A, original, MIT.

A Claude Code instruction file for building an MCP server that provides Seoul individual land-price information. MCP is a way for AI tools to call software services.

In plain words
What is it for?
Use it when developing or testing this Seoul land-price service, especially its API calls, environment settings, and stateless HTTP server setup.
Why use it?
It keeps implementation focused on the project's development plan and prevents deployment, documentation, and configuration mistakes that have caused problems before.

Instructions file for Claude Code

Written for Claude Code: the file is CLAUDE.md. Also seen: mentions CLAUDE.md; mentions Claude Code.

This is hlucent/seoul-individual-land-price-mcp's own configuration. It tells Claude Code how to work on seoul-individual-land-price-mcp itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything seoul-individual-land-price-mcp configures →

Reuse

Borrowing it

Nothing to install: this file belongs to hlucent/seoul-individual-land-price-mcp. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/hlucent/seoul-individual-land-price-mcp/master/CLAUDE.md
Clone the repo
git clone --depth 1 https://github.com/hlucent/seoul-individual-land-price-mcp

Made for: Claude Code.

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Per session 1,168 This file is loaded in full into every session.
When invoked 1,168 The same file — it is already loaded in full.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.01168 $0.01168
Opus 5 $0.00584 $0.00584
Sonnet 5 $0.00234 $0.00234
Haiku 4.5 $0.00117 $0.00117

Measured 11d ago against content hash ab349d150757, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

seoul-individual-land-price-mcp CLAUDE.md scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 11d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

CLAUDE.md · 71 lines

How it starts

The opening of the file, as written. The whole thing — 71 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CLAUDE.md — 서울시 개별공시지가 정보 MCP (Claude Code 실행 지침)

절대 규칙

  • DEVPLAN.md 하나만 먼저 읽고 시작한다. 다른 문서 재탐색 금지.
  • 웹서치 금지. API 스펙은 DEVPLAN.md에 이미 정리되어 있음.
  • 불확실한 부분은 추측성 재설계 대신 **기본값 1개로 구현 후 DEVLOG.md에 "확인 필요"**로 기록.
  • 동일 오류는 최대 3회까지만 재시도. 3회 실패 시 기록하고 사용자에게 보고 후 중단.
  • flyctl deployfly logs는 절대 스스로 실행하지 않는다. 출력이 길어 토큰을 많이 소모함. 배포 준비가 끝나면 안내 문구만 출력하고 멈춘다.

기술적으로 반드시 적용할 것 (과거 실패 원인 → 재발 방지)

.env 관련

.env 파일을 직접 생성하거나 점검하는 코드를 작성할 때, BOM(Byte Order Mark) 때문에 python-dotenv가 키를 못 읽는 문제가 과거에 있었음. .env는 PowerShell 스크립트가 BOM 없이 이미 생성해두므로, Claude Code는 이 파일을 새로 덮어쓰지 말고 존재 여부만 확인할 것. 만약 직접 .env.example을 만들 때는 UTF-8(BOM 없음)로 저장한다.

server.pymcp.run()은 항상 stateless_http=True 포함

mcp.run(transport="streamable-http", host="0.0.0.0", port=port, stateless_http=True)

이유: fly.io는 기본적으로 머신을 2대(고가용성) 띄운다. streamable-http 세션이 프로세스 인메모리에만 저장되면 fly proxy가 요청을 다른 머신으로 라우팅할 때 세션을 모르는 머신이 404를 반환한다. 게다가 auto_stop_machines로 머신이 재시작되면 세션이 전부 사라진다. 처음부터 stateless로 만들면 이 문제 자체가 발생하지 않는다.

이 옵션 없이 배포하면 Claude.ai 커넥터에서 "사용 가능한 도구 없음"으로 보이는 문제가 발생했던 전례가 있으므로 절대 빠뜨리지 않는다.

작업 순서

  1. requirements.txtfastmcp, httpx, python-dotenv
  2. seoul_api.py — API 호출 + 에러코드 매핑 (DEVPLAN.md의 에러 코드 표 그대로 반영)
  3. server.py — 툴 정의(DEVPLAN.md 기준 get_individual_land_price 1개), docstring에 응답 필드와 단위(공시지가는 원/㎡)를 반드시 명시. stateless_http=True 필수 반영.
    • 경로 파라미터 조립 시 선택 파라미터(BJDONG_NM/BONBEON/BUBEON/PILGI_CD)를 생략하지 말고 빈 문자열로 자리를 채워서 URL 경로 순서를 유지할 것 (DEVPLAN.md 1절 참고).
  4. .env.example, .gitignore 작성
  5. 로컬 테스트 — 실제 키로 각 파라미터 조합 호출, START_INDEX/END_INDEX로 실제 여러 건이 반환되는지 실측 확인(과거 다른 서울시 API에서 명세서와 달리 최신 1건만 반환된 사례 있음). 결과를 DEVLOG.md에 기록.
  6. FastMCP 서버 스모크 테스트 (initialize 요청까지만 — 세션 재사용 시나리오는 배포 후 검증)
  7. Dockerfile, fly.toml 작성
  8. README.md/DEVLOG.md 갱신
  9. git add/commit/push까지 수행
  10. 여기서 정지 — 아래 "사용자 안내 문구"를 그대로 출력하고 대기

사용자 안내 문구 (작업 완료 후 출력)

개발이 끝나고 Claude Code가 멈추면, 아래 3줄을 직접 실행하세요 (토큰 절약을 위해 자동 실행 안 함):
   fly launch --no-deploy
   fly secrets set SEOUL_API_KEY=발급받은키
   flyctl deploy

배포 후 Claude.ai > 설정 > 커넥터 에서 이 MCP를 연결/재연결하고
"사용 가능한 도구" 목록에 툴이 뜨는지 반드시 확인하세요.

Read the full file on GitHub · 71 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 11d ago First seen · 71 lines · 1,168 tokens per session scan A ab349d150757

Subscribe to this mod's changes

seoul-individual-land-price-mcp CLAUDE.md is an instructions file published in the GitHub repository hlucent/seoul-individual-land-price-mcp (0 stars, last pushed 19d ago), licensed MIT. It adds 1,168 tokens to every session, about $0.0058 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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