DeepL MCP Server

DeepL MCP Server

An MCP (Model Context Protocol) server providing DeepL translation capabilities.

Features

This server exposes the following tools via MCP:

• translate_text: Translates one or more text strings between supported languages using the DeepL API.
• list_languages: Retrieves the list of languages supported by the DeepL API (either source or target languages).

Prerequisites

• Node.js and npm/yarn: Required to install dependencies and run the server.
• DeepL API Key: You need an API key from DeepL. Both Free and Pro plans provide API access. Sign up or learn more at https://www.deepl.com/pro-api.

Installation

1. Clone the repository:
   git clone https://github.com/watchdealer-pavel/deepl-mcp-server.git cd deepl-mcp-server
2. Install dependencies:
   npm install # or # yarn install
3. Build the server:
   npm run build
   This command compiles the TypeScript source code into JavaScript, placing the output in the build/ directory (specifically build/index.js).

Configuration

The server requires your DeepL API key to be provided via the DEEPL_API_KEY environment variable. You need to configure your MCP client (like Cline/Roo Code or the Claude Desktop App) to run this server and pass the environment variable.

Example Configuration:

Below are examples for common MCP clients. Remember to replace /path/to/your/deepl-mcp-server/build/index.js with the actual absolute path to the compiled server file on your system, and YOUR_DEEPL_API_KEY with your real DeepL API key.

Cline / Roo Code (VS Code Extension)

1. Open your VS Code settings for MCP servers. On macOS, this is typically located at: ~/Library/Application Support/Code/User/globalStorage/rooveterinaryinc.roo-cline/settings/mcp_settings.json (Note: The exact path might vary based on your operating system and VS Code installation type (e.g., Insiders).)
2. Add the following configuration block under the mcpServers key:
   "deepl-translator": { "command": "node", "args": ["/path/to/your/deepl-mcp-server/build/index.js"], // <-- IMPORTANT: Replace with the ACTUAL absolute path to build/index.js "env": { "DEEPL_API_KEY": "YOUR_DEEPL_API_KEY" // <-- IMPORTANT: Replace with your DeepL API Key }, "disabled": false, "alwaysAllow": [] }

Claude Desktop App

1. Open the Claude Desktop App configuration file. On macOS, this is typically located at: ~/Library/Application Support/Claude/claude_desktop_config.json (Note: The exact path might vary based on your operating system.)
2. Add the following configuration block under the mcpServers key:
   "deepl-translator": { "command": "node", "args": ["/path/to/your/deepl-mcp-server/build/index.js"], // <-- IMPORTANT: Replace with the ACTUAL absolute path to build/index.js "env": { "DEEPL_API_KEY": "YOUR_DEEPL_API_KEY" // <-- IMPORTANT: Replace with your DeepL API Key }, "disabled": false, "alwaysAllow": [] }

Usage

Once configured, you can invoke the server's tools from your AI assistant using the use_mcp_tool command/tool.

list_languages Example

translate_text Example

License

This project is licensed under the MIT License - see the LICENSE file for details.