Lease Safe MCP

Lease Safe(전월세안전내비) is a PlayMCP-compatible remote MCP server for Korean lease, jeonse, wolse, and moving-safety guidance.

It uses official public data and reviewed official guidance to help users:

• convert a region name into official legal-dong codes through the official legal-dong API

• compare nearby reported rent deposits when a data.go.kr API key is configured

• compare a deposit against nearby sale prices to estimate sale-price-to-deposit risk

• detect contract red flags without making legal conclusions

• plan move-in protection steps such as move-in report, fixed date, and lease report

• prepare questions for landlords, agents, and official institutions

• route users to Government24, RTMS, Internet Registry Office, HUG, and lease dispute mediation paths

• summarize common lease-dispute prevention steps

PlayMCP Fit

• Streamable HTTP transport: POST /mcp

• Stateless server

• Tool count: 9

• No kakao string in server or tool names

• Required tool annotations included

• Compact Korean markdown outputs

• Dockerfile included for PlayMCP in KC Git source build

Related MCP server: kordoc

Data Sources

Automatic data:

• 행정안전부 행정표준코드 법정동코드 OpenAPI

• 국토교통부 아파트, 연립다세대, 단독/다가구, 오피스텔 전월세 실거래가 OpenAPI

• 국토교통부 아파트, 연립다세대, 단독/다가구, 오피스텔 매매 실거래가 OpenAPI

Reviewed official guidance:

• 정부24

• 부동산거래관리시스템 RTMS

• 인터넷등기소

• 법제처 찾기쉬운 생활법령

• 국가법령정보센터

• 한국부동산원·LH 임대차분쟁조정위원회

• HUG 주택도시보증공사

DATA_GO_KR_SERVICE_KEY is required for API-backed tools: resolve_legal_dong_code, compare_rent_market, and compare_deposit_to_sale_market. Encoded and decoded data.go.kr keys are both accepted. If the key is missing or rejected by data.go.kr, those tools fail clearly instead of using fake sample data.

Production Configuration

Production requires DNS rebinding protection:

MCP_ALLOWED_HOSTS=your.playmcp.host,your.custom.domain

Optional bearer-token protection is available for direct deployments:

MCP_AUTH_TOKEN=replace-with-runtime-secret

When MCP_AUTH_TOKEN is set, POST /mcp requires Authorization: Bearer <token>.

Run Locally

npm install
npm run build
MCP_ALLOWED_HOSTS=127.0.0.1,localhost npm start

MCP endpoint:

http://127.0.0.1:3000/mcp

Smoke:

MCP_ENDPOINT=http://127.0.0.1:3000/mcp npm run smoke

Live public-data smoke before production rollout:

DATA_GO_KR_SERVICE_KEY=... npm run smoke:public-data

Optional overrides:

PUBLIC_DATA_SMOKE_REGION="서울 관악구" PUBLIC_DATA_SMOKE_LAWD_CD=11620 PUBLIC_DATA_SMOKE_DEAL_YMD=202605 DATA_GO_KR_SERVICE_KEY=... npm run smoke:public-data

PlayMCP in KC Git-source build:

• Git URL: this repository URL

• Branch/ref: submission branch

• Dockerfile path: Dockerfile

• PAT: empty if the repository is public