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Works with

Claude CodeClaude DesktopCursorVS CodeClineCodex CLIOpenClaw+ any MCP client

Install to Claude Code

This server doesn't publish a one-line install command. Follow the setup in the source repository.

Summary

A Model Context Protocol server for reading TiDB RAG knowledge base, enabling browsing, searching, and vector search of knowledge entries.

README.md

TiDB RAG MCP Server

一个用于读取 TiDB 数据库中 RAG 知识库的 MCP (Model Context Protocol) 服务器。

功能特性

  • 📚 知识库浏览 - 列出和查看知识条目
  • 🔍 关键词搜索 - 在知识库中搜索内容
  • 🎯 向量搜索 - 支持 TiDB 向量相似度搜索(开发中)
  • 🔄 双模式支持 - Mock 数据模式和 TiDB 数据库模式

快速开始

1. 安装依赖

npm install

2. 配置环境变量

cp .env.example .env

编辑 .env 文件:

# Mock 模式 (无需数据库)
USE_MOCK=true

# TiDB 数据库配置 (USE_MOCK=false 时需要)
TIDB_HOST=localhost
TIDB_PORT=4000
TIDB_USER=root
TIDB_PASSWORD=your_password
TIDB_DATABASE=knowledge_db

3. 构建和运行

# 构建
npm run build

# 运行
npm start

MCP 工具

tidb_list_knowledge

列出知识库条目,支持分页和分类过滤。

参数: | 参数 | 类型 | 必填 | 默认值 | 说明 | |------|------|------|--------|------| | limit | number | 否 | 20 | 返回数量 (1-100) | | offset | number | 否 | 0 | 跳过数量 | | category | string | 否 | - | 按分类过滤 | | response_format | string | 否 | markdown | 输出格式: markdown/json |

示例:

{ "limit": 10, "category": "技术文档" }

tidb_get_knowledge

获取单条知识详情。

参数: | 参数 | 类型 | 必填 | 说明 | |------|------|------|------| | id | string | 是 | 知识条目 ID | | response_format | string | 否 | 输出格式: markdown/json |

示例:

{ "id": "kb-001" }

tidb_search_knowledge

在知识库中搜索。

参数: | 参数 | 类型 | 必填 | 说明 | |------|------|------|------| | query | string | 是 | 搜索关键词 | | limit | number | 否 | 返回数量 | | offset | number | 否 | 跳过数量 | | category | string | 否 | 按分类过滤 | | response_format | string | 否 | 输出格式 |

示例:

{ "query": "MCP 协议" }

tidb_vector_search

向量相似度搜索(开发中)。

参数: | 参数 | 类型 | 必填 | 说明 | |------|------|------|------| | embedding | number[] | 是 | 查询向量 | | top_k | number | 否 | 返回数量 | | threshold | number | 否 | 相似度阈值 |

Claude Desktop 配置

在 Claude Desktop 配置文件中添加:

Windows: %APPDATA%\Claude\claude_desktop_config.json macOS: ~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "tidb-rag": {
      "command": "node",
      "args": ["E:\\code\\mcp_test\\readKnowledgeMcp\\dist\\index.js"],
      "env": {
        "USE_MOCK": "true"
      }
    }
  }
}

使用 TiDB 数据库

{
  "mcpServers": {
    "tidb-rag": {
      "command": "node",
      "args": ["E:\\code\\mcp_test\\readKnowledgeMcp\\dist\\index.js"],
      "env": {
        "USE_MOCK": "false",
        "TIDB_HOST": "your-tidb-host",
        "TIDB_PORT": "4000",
        "TIDB_USER": "root",
        "TIDB_PASSWORD": "your-password",
        "TIDB_DATABASE": "knowledge_db"
      }
    }
  }
}

数据库表结构

当使用 TiDB 数据库时,需要以下表结构:

CREATE TABLE knowledge_base (
  id VARCHAR(36) PRIMARY KEY,
  title VARCHAR(255) NOT NULL,
  content TEXT NOT NULL,
  category VARCHAR(100),
  embedding VECTOR(1536),  -- 向量嵌入 (可选)
  metadata JSON,
  created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
  updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP
);

-- 向量索引 (可选,用于向量搜索)
CREATE VECTOR INDEX idx_embedding ON knowledge_base(embedding);

Mock 数据

Mock 模式包含以下示例知识:

  1. MCP 协议简介
  2. TiDB 向量搜索指南
  3. RAG 最佳实践
  4. TypeScript 类型系统进阶
  5. 知识库系统架构设计

开发

# 开发模式 (热重载)
npm run dev

# 构建
npm run build

# 清理构建
npm run clean

使用 MCP Inspector 测试

npx @modelcontextprotocol/inspector node dist/index.js

项目结构

tidb-rag-mcp-server/
├── src/
│   ├── index.ts           # MCP Server 入口
│   ├── types.ts           # 类型定义
│   ├── constants.ts       # 常量配置
│   ├── schemas/           # Zod 验证 schemas
│   │   └── index.ts
│   ├── services/          # 数据库和 Mock 服务
│   │   ├── database.ts
│   │   └── mock-data.ts
│   ├── tools/             # MCP 工具实现
│   │   ├── index.ts
│   │   ├── knowledge.ts
│   │   └── search.ts
│   └── utils/             # 工具函数
│       └── format.ts
├── dist/                  # 编译输出
├── package.json
├── tsconfig.json
└── .env.example

文档

License

MIT

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