64 tools to search, retrieve, and analyze Korean law — statutes, precedents, ordinances, and more.
npm version MCP 1.27 License: MIT TypeScript
MCP server + CLI for Korea's official legal database (법제처 Open API). Works with Claude Desktop, Cursor, Windsurf, Zed, and any MCP-compatible client.
South Korea has 1,600+ active laws, 10,000+ administrative rules, and a precedent system spanning Supreme Court, Constitutional Court, tax tribunals, and customs rulings. All of this lives behind a clunky government API with zero developer experience.
This project wraps that entire legal system into 64 structured tools that any AI assistant or script can call. Built by a Korean civil servant who got tired of manually searching 법제처 for the hundredth time.
- 64 Legal Tools — Statutes, precedents, admin rules, ordinances, constitutional decisions, tax rulings, customs interpretations, legal terminology
- MCP + CLI — Use from Claude Desktop or from your terminal. Same 64 tools.
- Korean Law Intelligence — Auto-resolves abbreviations (
화관법→화학물질관리법), converts article numbers (제38조↔003800), visualizes 3-tier delegation - Annex Extraction — Downloads HWPX/HWP annexes and converts tables to Markdown automatically
- 7 Chain Tools — Composite research workflows in a single call (e.g.
chain_full_research: AI search → statutes → precedents → interpretations) - Caching — 1-hour search cache, 24-hour article cache
- Remote Endpoint — Use without installation via
https://korean-law-mcp.fly.dev/mcp
npm install -g korean-law-mcp
Add to your MCP client config:
{
"mcpServers": {
"korean-law": {
"command": "korean-law-mcp",
"env": {
"LAW_OC": "your-api-key"
}
}
}
}Get your free API key at 법제처 Open API.
| Client | Config File |
|---|---|
| Claude Desktop | %APPDATA%\Claude\claude_desktop_config.json (Win) / ~/Library/Application Support/Claude/claude_desktop_config.json (Mac) |
| Cursor | .cursor/mcp.json |
| Windsurf | .windsurf/mcp.json |
| Continue | ~/.continue/config.json |
| Zed | ~/.config/zed/settings.json |
{
"mcpServers": {
"korean-law": {
"url": "https://korean-law-mcp.fly.dev/mcp"
}
}
}npm install -g korean-law-mcp export LAW_OC=your-api-key korean-law search_law --query "관세법" korean-law get_law_text --mst 160001 --jo "제38조" korean-law search_precedents --query "부당해고" korean-law list # all 64 tools korean-law list --category 판례 # filter by category korean-law help search_law # tool help
docker build -t korean-law-mcp .
docker run -e LAW_OC=your-api-key -p 3000:3000 korean-law-mcp| Tool | Description |
|---|---|
search_law |
Search statutes (auto-resolves abbreviations) |
search_admin_rule |
Search administrative rules |
search_ordinance |
Search local ordinances |
search_precedents |
Search court precedents |
search_interpretations |
Search legal interpretations |
search_all |
Unified search across all categories |
suggest_law_names |
Law name autocomplete |
advanced_search |
Advanced search with date/keyword filters |
get_law_history |
Law amendment history by date |
get_annexes |
Retrieve annexes + extract HWPX/HWP to Markdown |
parse_jo_code |
Article number ↔ JO code conversion |
| Tool | Description |
|---|---|
get_law_text |
Full statute text |
get_admin_rule |
Full administrative rule |
get_ordinance |
Full local ordinance |
get_precedent_text |
Full precedent text |
get_interpretation_text |
Full interpretation text |
get_batch_articles |
Batch article retrieval (multiple laws) |
get_article_with_precedents |
Article + related precedents |
compare_old_new |
Old vs. new law comparison |
get_three_tier |
Law → Decree → Rule 3-tier comparison |
| Tool | Description |
|---|---|
compare_articles |
Cross-law article comparison |
get_law_tree |
Delegation structure tree |
get_article_history |
Article amendment history |
summarize_precedent |
Precedent summary |
extract_precedent_keywords |
Precedent keyword extraction |
find_similar_precedents |
Similar precedent search |
get_law_statistics |
Law statistics |
parse_article_links |
Parse in-text legal references |
get_external_links |
Generate external links |
| Tool | Description |
|---|---|
search_tax_tribunal_decisions |
Tax tribunal decisions |
search_customs_interpretations |
Customs interpretations |
search_constitutional_decisions |
Constitutional Court decisions |
search_admin_appeals |
Administrative appeal decisions |
search_ftc_decisions |
Fair Trade Commission decisions |
search_nlrc_decisions |
Labor Relations Commission decisions |
search_pipc_decisions |
Privacy Commission decisions |
+ get_*_text for each |
Full text retrieval |
| Tool | Description |
|---|---|
get_legal_term_kb |
Legal terminology search |
get_legal_term_detail |
Term definition |
get_daily_term |
Everyday language search |
get_daily_to_legal |
Everyday → legal term mapping |
get_legal_to_daily |
Legal → everyday term mapping |
get_term_articles |
Articles using a term |
get_related_laws |
Related laws |
Composite research workflows — multiple tools in a single call.
| Tool | Workflow |
|---|---|
chain_law_system |
Search → 3-tier comparison → batch articles |
chain_action_basis |
Law system → interpretations → precedents → appeals |
chain_dispute_prep |
Precedents + appeals + specialized decisions |
chain_amendment_track |
Old/new comparison + article history |
chain_ordinance_compare |
Parent law → nationwide ordinance search |
chain_full_research |
AI search → statutes → precedents → interpretations |
chain_procedure_detail |
Law system → annexes → enforcement rule annexes |
| Tool | Description |
|---|---|
search_ai_law |
Natural language AI search |
search_english_law / get_english_law_text |
English law search/retrieval |
search_historical_law / get_historical_law |
Historical law search/retrieval |
search_legal_terms |
Legal dictionary search |
User: "관세법 제38조 알려줘"
→ search_law("관세법") → get_law_text(mst, jo="003800")
User: "화관법 최근 개정 비교"
→ "화관법" → "화학물질관리법" auto-resolved → compare_old_new(mst)
User: "근로기준법 제74조 해석례"
→ search_interpretations("근로기준법 제74조") → get_interpretation_text(id)
User: "산업안전보건법 별표1 내용"
→ get_annexes("산업안전보건법 별표1") → HWPX download → Markdown table
| Variable | Required | Default | Description |
|---|---|---|---|
LAW_OC |
Yes | — | 법제처 API key (get one free) |
PORT |
No | 3000 | HTTP server port |
CORS_ORIGIN |
No | * |
CORS allowed origin |
RATE_LIMIT_RPM |
No | 60 | Requests per minute per IP |
- docs/API.md — 64-tool reference
- docs/ARCHITECTURE.md — System design
- docs/DEVELOPMENT.md — Development guide
- 법제처 Open API — Korea's official legal database
- Anthropic — Model Context Protocol
- kordoc — HWP/HWPX parser (same author)
Made by a Korean civil servant @ 광진구청 AI동호회 AI.Do