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Deepl MCP Server

@DeepLcom

Repository

Basic information

Category

Other

License

MIT

Transports

stdio

Author

DeepLcom

About Deepl MCP Server

A Model Context Protocol (MCP) server that provides translation capabilities using the DeepL API.

Deepl MCP Server config

Add this server to your MCP-compatible client using the configuration below.

{
  "mcpServers": {
    "deepl-mcp-server": {
      "command": "npx",
      "args": [
        "deepl-mcp-server"
      ]
    }
  }
}

Deepl MCP Server tools

8

Get list of available source languages for translation

Get list of available target languages for translation

Translate text to a target language

Rephrase text in the same or different language

Translate a document

Get list of all glossaries and their associated metadata

Get metadata about a specific glossary by id

Retrieve entries from a glossary dictionary

Overview

What is deepl-mcp-server?

A Model Context Protocol (MCP) server that provides translation capabilities using the DeepL API. It enables AI assistants to translate text and documents, rephrase text, and leverage DeepL glossaries for consistent terminology. Designed for developers integrating DeepL translation into AI workflows.

How to use deepl-mcp-server?

Run with npx deepl-mcp-server (no installation required). A DeepL API key is mandatory, set via the DEEPL_API_KEY environment variable. Integrate with Claude Desktop by editing claude_desktop_config.json or use claude mcp add with Claude Code.

Key features of deepl-mcp-server

  • Translate text between numerous supported languages
  • Translate documents (PDF, DOCX, PPTX, HTML, TXT, etc.)
  • Rephrase text with configurable style and tone
  • Automatic source language detection
  • Formality control for supported languages
  • Glossary support for consistent terminology translation
  • List available source and target languages

Use cases of deepl-mcp-server

  • Translate user text inline during AI conversations (e.g., in Claude Desktop)
  • Automatically translate uploaded documents via an AI agent with filesystem access
  • Rephrase existing content to match business, academic, or casual styles
  • Enforce consistent terminology by applying custom DeepL glossaries to translations

Frequently asked questions

1

What API key do I need and is there a free tier?

You need a DeepL API key from deepl.com/pro-api. A free account lets you translate up to 500,000 characters per month.

2

What tools does the server provide?

It provides `translate-text`, `translate-document`, `rephrase-text`, `get-source-languages`, `get-target-languages`, `list-glossaries`, `get-glossary-info`, `get-glossary-dictionary-entries`, `get-writing-styles`, and `get-writing-tones`.

3

How do I configure it with Claude Desktop?

Create or edit `claude_desktop_config.json` (macOS: `~/Library/Application Support/Claude/`, Windows: `%AppData%\Claude\`, Linux: `~/.config/Claude/`). Add an entry with `command: "npx"`, `args: ["deepl-mcp-server"]`, and `env: { "DEEPL_API_KEY": "your-key" }`.

4

What document formats are supported for translation?

PDF, DOCX, PPTX, XLSX, HTML, TXT, and more.

5

How does glossary support work?

You can list all glossaries (`list-glossaries`), get metadata for a specific glossary (`get-glossary-info`), and retrieve actual term entries (`get-glossary-dictionary-entries`). Use the `glossaryId` parameter in `translate-text` or `translate-document` to apply a glossary for consistent terminology.

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