Langflow-DOC-QA-SERVER

# Langflow-DOC-QA-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  ### 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  ## 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: ```bash npm install ``` Build the server: ```bash npm run build ``` For development with auto-rebuild: ```bash 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` ```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" } } } } ```  ### 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](https://github.com/modelcontextprotocol/inspector), which is available as a package script: ```bash 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.