Langflow-DOC-QA-SERVER

👁 MCP Server

A Model Context Protocol server for document Q&A powered by Langflow

This is a TypeScript-based MCP server that implements a document Q&A system. It demonstrates core MCP concepts by providing a simple interface to query documents through a Langflow backend.

Prerequisites

1. Create Langflow Document Q&A Flow

1. Open Langflow and create a new flow from the "Document Q&A" template

2. Configure your flow with necessary components (ChatInput, File Upload, LLM, etc.)

3. Save your flow

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2. Get Flow API Endpoint

1. Click the "API" button in the top 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 needed for the API_ENDPOINT configuration

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Related MCP server: Dedalus MCP Documentation Server

Features

Tools

• query_docs - Query the document Q&A system

  • Takes a query string as input

  • Returns responses from the Langflow backend

Development

Install dependencies:

npm install

Build the server:

npm run build

For development with auto-rebuild:

npm run watch

Installation

To use with Claude Desktop, add the server config:

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/480ec7b3-29d2-4caa-b03b-e74118f35fac"
 }
 }
 }
}

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Installing via Smithery

To install Document Q&A Server for Claude Desktop automatically via Smithery:

npx -y @smithery/cli install @GongRzhe/Langflow-DOC-QA-SERVER --client claude

Environment Variables

The server supports the following environment variables for configuration:

• API_ENDPOINT: The endpoint URL for the Langflow API service. Defaults to http://127.0.0.1:7860/api/v1/run/480ec7b3-29d2-4caa-b03b-e74118f35fac if not specified.

Debugging

Since MCP servers communicate over stdio, debugging can be challenging. We recommend using the MCP Inspector, which is available as a package script:

npm run inspector

The Inspector will provide a URL to access debugging tools in your browser.

📜 License

This project is licensed under the MIT License.

Maintenance

Resources

• GitHub Repository
Need Help?Related Servers

Tools

• query_docsC