Dify External Knowledge MCP Server

Dify External Knowledge MCP Server

Integrates Dify's external knowledge base API with the Model Context Protocol to enable AI agents to retrieve and query relevant information. It supports relevance scoring, metadata filtering, and flexible configuration through environment variables or command-line arguments.

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Dify External Knowledge MCP Server

一個 Model Context Protocol (MCP) 伺服器,用於整合 Dify 外部知識庫 API,讓 AI Agent 能夠輕鬆查詢知識庫內容。

安裝

使用 npx (推薦)

npx @funtuantw/dify-external-knowledge-mcp

全域安裝

npm install -g @funtuantw/dify-external-knowledge-mcp

從源碼構建

git clone https://github.com/funtuantw/dify-external-knowledge-mcp.git
cd dify-external-knowledge-mcp
npm install
npm run build

功能特性

  • 🔍 查詢 Dify 外部知識庫
  • 📊 支援相關性分數閾值設定
  • 🎯 支援元數據條件篩選
  • 🔐 使用環境變數管理 API 憑證
  • 📦 支援 npx 直接運行
  • 🌐 知識庫 ID 透過環境變數配置,無需每次指定

配置

{
  "mcpServers": {
    "dify-knowledge": {
      "command": "npx",
      "args": ["@funtuantw/dify-external-knowledge-mcp"],
      "env": {
        "DIFY_KNOWLEDGE_ENDPOINT": "https://your-endpoint.com",
        "DIFY_API_KEY": "your-api-key-here",
        "DIFY_KNOWLEDGE_ID": "your-knowledge-id-here"
      }
    }
  }
}

或者使用本地路徑(開發時):

{
  "mcpServers": {
    "dify-knowledge": {
      "command": "node",
      "args": ["/absolute/path/to/dify-external-knowledge-mcp/dist/index.js"],
      "env": {
        "DIFY_KNOWLEDGE_ENDPOINT": "https://your-endpoint.com",
        "DIFY_API_KEY": "your-api-key-here",
        "DIFY_KNOWLEDGE_ID": "your-knowledge-id-here"
      }
    }
  }
}

使用命令列參數:

{
  "mcpServers": {
    "dify-knowledge": {
      "command": "npx",
      "args": [
        "@funtuantw/dify-external-knowledge-mcp",
        "--endpoint",
        "https://your-endpoint.com",
        "--api-key",
        "your-api-key-here",
        "--knowledge-id",
        "your-knowledge-id-here"
      ]
    }
  }
}

使用方法

可用工具

query_dify_knowledge

查詢 Dify 外部知識庫以檢索相關資訊。

參數:

  • query (必需, string): 用戶的搜尋查詢或問題
  • top_k (可選, number): 返回的最大結果數量(預設:5)
  • score_threshold (可選, number): 最小相關性分數閾值,範圍 0-1(預設:0.5)
  • metadata_condition (可選, object): 元數據篩選條件
    • logical_operator (可選, string): "and" 或 "or"(預設:and)
    • conditions (必需, array): 條件列表
      • name (必需, string[]): 要篩選的元數據欄位名稱
      • comparison_operator (必需, string): 比較運算符(contains, is, not contains, etc.)
      • value (可選, string): 比較值

範例使用(通過 AI Agent):

請使用 query_dify_knowledge 工具查詢 "什麼是 Dify?"

範例輸出:

Found 2 result(s) for query: "什麼是 Dify?"

### Result 1 (Score: 0.980)
**Title**: knowledge.txt
**Content**:
Dify 是一個 LLMOps 平台,提供 GenAI 應用程序的創新引擎。

**Metadata**: {
  "path": "s3://dify/knowledge.txt",
  "description": "dify 知識文檔"
}
---

### Result 2 (Score: 0.660)
**Title**: introduce.txt
**Content**:
GenAI 應用程序的創新引擎

**Metadata**: {
  "path": "s3://dify/introduce.txt",
  "description": "dify 介紹"
}
---

開發

開發模式運行

npm run dev

構建專案

npm run build

運行構建版本

npm start

API 參考

本專案使用 Dify 外部知識庫 API

支援的比較運算符

  • contains: 包含某個值
  • not contains: 不包含某個值
  • start with: 以某個值開頭
  • end with: 以某個值結尾
  • is: 等於某個值
  • is not: 不等於某個值
  • empty: 為空
  • not empty: 不為空
  • =: 等於
  • : 不等於
  • >: 大於
  • <: 小於
  • : 大於等於
  • : 小於等於
  • before: 在某個日期之前
  • after: 在某個日期之後

錯誤處理

伺服器會處理以下錯誤情況:

  • 1001: 無效的 Authorization 頭格式
  • 1002: 授權失敗
  • 2001: 知識庫不存在
  • HTTP 403: 訪問被拒絕
  • HTTP 500: 內部伺服器錯誤

專案結構

dify-external-knowledge-mcp/
├── src/
│   └── index.ts          # MCP 伺服器主程式
├── dist/                 # 編譯後的輸出
├── .env.example          # 環境變數範例
├── .gitignore
├── package.json
├── tsconfig.json
├── plan.md              # 專案計畫文檔
└── README.md

授權

MIT

貢獻

歡迎提交 Issue 和 Pull Request!

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