KJH Law MCP - Legal Search MCP Server

This is an MCP server for searching, retrieving, and analyzing South Korean laws. It provides 89 legal tools based on the Ministry of Government Legislation Open API.

Based on korean-law-mcp by chrisryugj (MIT License)

Prerequisites: API Key Issuance

You must first obtain a Ministry of Government Legislation Open API Authentication Key (OC), which is required for all usage methods.

1. Visit the Ministry of Government Legislation Open API Application Page

2. Sign up and log in

3. Click the "Open API Usage Application" button

4. Fill out the application form and receive your Authentication Key (OC) (e.g., honggildong)

Related MCP server: Korean Law MCP Server

Usage

Method 1: Use directly in Claude.ai web (No installation required)

You can use it directly as a connector in Claude Pro/Max/Team/Enterprise plans.

1. claude.ai → Settings → Connectors → Add Custom Connector

2. Enter the URL below (replace honggildong with your own authentication key):

https://korean-law-mcp.fly.dev/mcp?profile=lite&oc=honggildong

3. Set tools to "Always allow"

4. Just type "Tell me about Article 74 of the Labor Standards Act" in the chat!

lite vs full: You can use all 89 features even with the lite (14 tools) version. Remove profile=lite& from the URL for full mode.

Method 2: AI Desktop Apps (Claude Desktop, Cursor, Windsurf, etc.)

Add the following to your configuration file:

{
  "mcpServers": {
    "korean-law": {
      "url": "https://korean-law-mcp.fly.dev/mcp?oc=honggildong"
    }
  }
}

Method 3: Local Installation

npm install -g kjh-law-mcp

AI App Settings:

{
  "mcpServers": {
    "korean-law": {
      "command": "korean-law-mcp",
      "env": {
        "LAW_OC": "honggildong"
      }
    }
  }
}

Method 4: CLI Usage

# 인증키 설정
export LAW_OC=honggildong        # Mac/Linux
set LAW_OC=honggildong           # Windows CMD
$env:LAW_OC="honggildong"       # Windows PowerShell

# 사용 예시
korean-law "민법 제1조"                    # 자연어 조회
korean-law search_law --query "관세법"     # 도구 직접 호출
korean-law list                            # 전체 도구 목록
korean-law help search_law                 # 도구별 도움말

How to provide the API Key

Usage Examples

"관세법 제38조 알려줘"
→ search_law("관세법") → MST 획득 → get_law_text(mst, jo="003800")

"화관법 최근 개정 비교"
→ "화관법" → "화학물질관리법" 자동 변환 → compare_old_new(mst)

"근로기준법 제74조 해석례"
→ search_interpretations("근로기준법 제74조") → get_interpretation_text(id)

"산업안전보건법 별표1 내용 알려줘"
→ get_annexes(lawName="산업안전보건법 별표1") → HWPX 다운로드 → Markdown 변환

Tool List (89 total)

Key Features

• 89 Legal Tools - Statutes, precedents, administrative rules, local ordinances, Constitutional Court decisions, tax tribunal decisions, customs interpretations, treaties, etc.

• MCP + CLI - Supports both AI apps and terminal environments

• Legal Domain Specialization - Auto-recognition of abbreviations (e.g., 화관법 -> Chemical Substances Control Act), article number conversion

• Annex/Form Extraction - Automatic download of HWPX/HWP files and conversion to Markdown

• 8 Chain Tools - Process complex research in a single call

• Tool Profiles - Automatic selection between lite (14) / full (89) profiles

• Caching - 1-hour TTL for searches, 24-hour TTL for articles

• Remote Endpoint - Ready to use without installation

License

MIT

Based on korean-law-mcp by chrisryugj (MIT License)