Langflow DOC QA SERVER

🚀 Langflow - Document Q&A - MCP Server

A document Q&A system powered by Langflow, demonstrating core MCP concepts and enabling document queries through a simple interface.

🚀 Quick Start

This is a document Q&A system supported by Langflow, which demonstrates the core MCP concepts and allows you to query documents through a simple interface.

✨ Features

Tools

• query_docs - Query the document Q&A system
  • Accepts a query string as input
  • Returns the answer from the Langflow backend

📦 Installation

Prerequisites

1. Create a Langflow Document Q&A Flow

1. Open Langflow and create a new flow from the "Document Q&A" template.
2. Configure your flow with the necessary components (chat input, file upload, LLM, etc.).
3. Save your flow.

2. Get the Flow API Endpoint

1. Click the "API" button in the upper right corner of Langflow.
2. Copy the API endpoint URL from the cURL command. Example: http://127.0.0.1:7860/api/v1/run/<flow-id>?stream=false
3. Save this URL as it will be used for the API_ENDPOINT configuration.

Install Dependencies

npm install

Build the Server

npm run build

Development with Automatic Rebuild

npm run watch

Add Server Configuration when Using with Claude Desktop

On MacOS: ~/Library/Application Support/Claude/claude_desktop_config.json On Windows: %APPDATA%/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "langflow-doc-qa-server": {
      "command": "node",
      "args": [
        "/path/to/doc-qa-server/build/index.js"
      ],
      "env": {
        "API_ENDPOINT": "http://127.0.0.1:7860/api/v1/run/480ec7b3-29d3-4d18-9a39-57af4240b7ac"
      }
    }
  }
}

💻 Usage Examples

Basic Usage

To use the server, you need to follow the installation steps above and then start the server according to the configuration.

🔧 Technical Details

Debugging

Use the Inspector tool to check the server:

npm run inspect

Access http://localhost:3000/debug in your browser.

📄 License

This project is licensed under the MIT license.