javadoc-mcp

javadoc-mcp

Enables browsing JavaDoc documentation of Java libraries via Maven coordinates, with tools to list packages, classes, methods, and search.

Category
Visit Server

README

javadoc-mcp

一个同时提供 MCP 服务和 Shell CLI 的工具,让 AI 助手或终端用户能够通过 Maven 坐标浏览 JavaDoc 文档。

发布记录见 CHANGELOG.md

功能

提供 5 个 JavaDoc 浏览能力,既可通过 MCP tools 调用,也可通过 CLI 子命令调用:

Tool 说明
list_packages 列出库中所有包
list_classes 列出包中的类、接口、枚举、注解、异常、record
get_class 获取类概览文档(签名、描述、成员摘要)
get_member 获取方法/字段的完整文档(参数、返回值、异常等)
search 按关键词搜索类型、成员或包;category 可省略,type/member 结果会显示完整类名并支持完整限定名查询

运行要求

  • Node.js 18+
  • Maven (mvn 需要在 PATH 中可用)

服务会优先读取本地 Maven 仓库中的 JavaDoc JAR;如果缺失,则通过 mvn dependency:get 拉取对应的 -javadoc.jar

安装

安装后会提供两个可执行文件:

  • javadoc-mcp:启动 MCP 服务
  • javadoc-cli:在 shell 中直接查询 JavaDoc

方式一:直接通过 npx 使用 MCP

npx -y javadoc-mcp

方式二:全局安装

npm install -g javadoc-mcp

安装完成后,可直接运行:

javadoc-mcp

也可以直接在 shell 中调用 CLI:

javadoc-cli --help

如果不想全局安装,可以通过 npx 临时调用 CLI:

npx -y -p javadoc-mcp javadoc-cli --help

当前版本已经覆盖 npx 和其他符号链接路径下的 CLI 启动场景。

配置 MCP 客户端

Claude Code

推荐直接通过 npx 启动,这样不需要手动管理安装路径:

编辑 ~/.claude/settings.json

{
  "mcpServers": {
    "javadoc": {
      "command": "npx",
      "args": ["-y", "javadoc-mcp"]
    }
  }
}

如果你已经全局安装,也可以写成:

{
  "mcpServers": {
    "javadoc": {
      "command": "javadoc-mcp",
      "args": []
    }
  }
}

Claude Desktop

编辑 claude_desktop_config.json

{
  "mcpServers": {
    "javadoc": {
      "command": "npx",
      "args": ["-y", "javadoc-mcp"]
    }
  }
}

从源码开发

npm install
npm run build
npm test

构建产物输出到 dist/ 目录。

本地开发时也可以直接运行 CLI:

node dist/cli.js --help

调试

使用 MCP Inspector 进行交互式测试:

npx @modelcontextprotocol/inspector node dist/index.js

使用示例

CLI

javadoc-cli list-packages \
  --group-id org.apache.commons \
  --artifact-id commons-lang3 \
  --version 3.14.0

javadoc-cli list-classes \
  --group-id org.apache.commons \
  --artifact-id commons-lang3 \
  --version 3.14.0 \
  --package-name org.apache.commons.lang3

javadoc-cli get-class \
  --group-id org.apache.commons \
  --artifact-id commons-lang3 \
  --version 3.14.0 \
  --class-name org.apache.commons.lang3.StringUtils

javadoc-cli get-member \
  --group-id org.apache.commons \
  --artifact-id commons-lang3 \
  --version 3.14.0 \
  --class-name org.apache.commons.lang3.StringUtils \
  --member-name join

javadoc-cli search \
  --group-id org.apache.commons \
  --artifact-id commons-lang3 \
  --version 3.14.0 \
  --query String \
  --category type

MCP

典型的浏览流程:

1. list_packages(groupId="org.apache.commons", artifactId="commons-lang3", version="3.14.0")
   → 获取所有包名

2. list_classes(..., packageName="org.apache.commons.lang3")
   → 查看包中的类型列表

3. get_class(..., className="org.apache.commons.lang3.StringUtils")
   → 查看 StringUtils 类的概览和方法摘要

4. get_member(..., className="org.apache.commons.lang3.StringUtils", memberName="join")
   → 查看 join 方法的完整文档

5. search(..., query="String", category="type")
   → 搜索名称或完整类名含 "String" 的类型

6. search(..., query="org.apache.commons.lang3.StringUtils.join")
   → 在未指定 `category` 时跨类型/成员/包搜索,按完整成员引用查找成员

本地仓库

JavaDoc JAR 直接使用 Maven 本地仓库中的文件,默认路径为 ~/.m2/repository。如果 ~/.m2/settings.xml 中配置了 <localRepository>,则使用该路径。

如需重新拉取某个文档,可删除对应坐标下的 *-javadoc.jar 后再次调用工具。

技术栈

  • TypeScript (ES Modules)
  • @modelcontextprotocol/sdk — MCP 协议实现
  • cheerio — HTML 解析
  • adm-zip — 直接从 JAR 读取文件,不解压到磁盘
  • zod — 参数校验

仓库与反馈

  • GitHub: https://github.com/loong95/javadoc-mcp
  • Issues: https://github.com/loong95/javadoc-mcp/issues

Recommended Servers

playwright-mcp

playwright-mcp

A Model Context Protocol server that enables LLMs to interact with web pages through structured accessibility snapshots without requiring vision models or screenshots.

Official
Featured
TypeScript
Magic Component Platform (MCP)

Magic Component Platform (MCP)

An AI-powered tool that generates modern UI components from natural language descriptions, integrating with popular IDEs to streamline UI development workflow.

Official
Featured
Local
TypeScript
Audiense Insights MCP Server

Audiense Insights MCP Server

Enables interaction with Audiense Insights accounts via the Model Context Protocol, facilitating the extraction and analysis of marketing insights and audience data including demographics, behavior, and influencer engagement.

Official
Featured
Local
TypeScript
VeyraX MCP

VeyraX MCP

Single MCP tool to connect all your favorite tools: Gmail, Calendar and 40 more.

Official
Featured
Local
graphlit-mcp-server

graphlit-mcp-server

The Model Context Protocol (MCP) Server enables integration between MCP clients and the Graphlit service. Ingest anything from Slack to Gmail to podcast feeds, in addition to web crawling, into a Graphlit project - and then retrieve relevant contents from the MCP client.

Official
Featured
TypeScript
Kagi MCP Server

Kagi MCP Server

An MCP server that integrates Kagi search capabilities with Claude AI, enabling Claude to perform real-time web searches when answering questions that require up-to-date information.

Official
Featured
Python
E2B

E2B

Using MCP to run code via e2b.

Official
Featured
Neon Database

Neon Database

MCP server for interacting with Neon Management API and databases

Official
Featured
Exa Search

Exa Search

A Model Context Protocol (MCP) server lets AI assistants like Claude use the Exa AI Search API for web searches. This setup allows AI models to get real-time web information in a safe and controlled way.

Official
Featured
Qdrant Server

Qdrant Server

This repository is an example of how to create a MCP server for Qdrant, a vector search engine.

Official
Featured