What is maplestory-mcp-server CLAUDE.md?

Project instructions for a MapleStory MCP server, which connects an agent to Nexon’s public MapleStory game API. They describe the Python setup, required API key, commands, and available categories.

Use them when developing or running MapleStory lookups for characters, unions, guilds, rankings, history, and notices.

They tell an agent how to run the server and how MapleStory lookups work, including the required character-name-to-ID lookup sequence. This reduces setup and API-use mistakes.

How kcw2034/maplestory-mcp-server configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to kcw2034/maplestory-mcp-server. 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/kcw2034/maplestory-mcp-server/main/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/kcw2034/maplestory-mcp-server

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/instructions/kcw2034/maplestory-mcp-server/claude-md/github.svg)](https://agentmods.dev/instructions/kcw2034/maplestory-mcp-server/claude-md)

Your own site

<a href="https://agentmods.dev/instructions/kcw2034/maplestory-mcp-server/claude-md"><img src="https://agentmods.dev/badge/instructions/kcw2034/maplestory-mcp-server/claude-md/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/instructions/kcw2034/maplestory-mcp-server/claude-md"><img src="https://agentmods.dev/badge/instructions/kcw2034/maplestory-mcp-server/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 290 This file is loaded in full into every session.

When invoked 290 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.

Model	Per session	Once invoked
Fable 5.1	$0.00290	$0.00290
Opus 5.5	$0.00116	$0.00116
Sonnet 5.5	$0.00058	$0.00058
Haiku 4.5	$0.00029	$0.00029

Measured 2mo ago against content hash d310112fc0b1, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

maplestory-mcp-server 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 2mo 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 · 28 lines

What it actually says

MapleStory MCP Server

프로젝트 개요

메이플스토리 OpenAPI를 래핑하는 MCP(Model Context Protocol) 서버. FastMCP 기반.

기술 스택

Python 3.13, uv 패키지 매니저
FastMCP (>=3.1.1), httpx (>=0.28.1)
Nexon OpenAPI (https://open.api.nexon.com)

개발 명령어

uv run server.py - MCP 서버 실행
uv sync - 의존성 설치
uv add <pkg> - 패키지 추가

환경 변수

MAPLESTORY_API_KEY - Nexon OpenAPI 키 (필수). .env에 설정

프로젝트 구조

server.py - 단일 파일 MCP 서버. 모든 tool 정의 포함
API 카테고리: 캐릭터, 유니온, 길드, 랭킹, 히스토리, 공지

코드 패턴

모든 API 호출은 _request() 헬퍼를 통해 수행
Tool 파라미터는 Annotated[type, "설명"] 패턴 사용
Docstring 및 파라미터 설명은 한국어로 작성
캐릭터 조회 흐름: 이름 → OCID 조회 → OCID로 상세 정보 조회

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.

2mo ago First seen · 28 lines · 290 tokens per session scan A d310112fc0b1

Subscribe to this mod's changes

maplestory-mcp-server CLAUDE.md is an instructions file published in the GitHub repository kcw2034/maplestory-mcp-server (0 stars, last pushed 7mo ago), licensed MIT. It adds 290 tokens to every session, about $0.0012 per session on Opus 5.5. 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.

Game development

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maplestory-mcp-server: Instructions file for Claude Code