How do I find my DeepL API Key?

Log in to your [**DeepL account**](https://www.deepl.com/pro-account/plan), and you will find your Authentication Key under the 'Account' tab. Copy and paste it below.

Does this work with both Free and Pro API keys?

Yes. This server automatically detects if you are using a Free key (ending in `:fx`) or a Pro key and routes requests to the correct endpoint.

Can the agent use glossaries?

Yes. You can list your existing glossaries via the `get_glossaries` tool and identify their IDs to maintain consistency in your agent-led translations.

DeepL MCP Server for Claude Desktop 9 tools — connect in under 2 minutes

Name: DeepL
Availability: InStock
Author: Vinkius

modelcontextprotocol.io/quickstart/user

Built by Vinkius GDPR 9 Tools IDE

Claude Desktop is Anthropic's native application for interacting with Claude AI models on macOS and Windows. It was the first consumer application to ship with built-in MCP support, making it the reference implementation for the Model Context Protocol standard.

Get MCP Server for AI Agents

ASK AI ABOUT THIS MCP SERVER

Open in ChatGPT Open in Claude Open in Perplexity

Vinkius supports streamable HTTP and SSE.

RecommendedModern Approach — Zero Configuration

Vinkius Desktop App

The modern way to manage MCP Servers — no config files, no terminal commands. Install DeepL and 2,500+ MCP Servers from a single visual interface.

Download Free Open SourceNo signup required

Classic Setup·json

{
  "mcpServers": {
    "deepl": {
      // Your Vinkius token — get it at cloud.vinkius.com
      "url": "https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp"
    }
  }
}

Fully ManagedVinkius Servers

60%Token savings

High SecurityEnterprise-grade

IAMAccess control

EU AI ActCompliant

DLPData protection

V8 IsolateSandboxed

Ed25519Audit chain

<40msKill switch

Stream every event to Splunk, Datadog, or your own webhook in real-time

* Every MCP server runs on Vinkius-managed infrastructure inside AWS - a purpose-built runtime with per-request V8 isolates, Ed25519 signed audit chains, and sub-40ms cold starts optimized for native MCP execution. See our infrastructure

About DeepL MCP Server

Empower your AI agent to orchestrate your entire multilingual workflow with DeepL, the world's most accurate AI translator. By connecting DeepL to your agent, you transform complex translation tasks into a natural conversation. Your agent can instantly translate text between dozens of languages, audit available language pairs, and monitor API usage without you ever touching a technical dashboard. Whether you are localized content or communicating with international teams, your agent acts as a real-time linguistic bridge, ensuring your communication is always precise and professional.

Claude Desktop is the definitive way to connect DeepL to your AI workflow. Add the Vinkius Edge URL to your config, restart the app, and Claude immediately exposes all 9 tools in the chat interface — ask a question, Claude calls the right tool, and you see the answer. Zero code, zero context switching.

What you can do

Text Auditing — Translate text into target languages and retrieve detected source language metadata instantly.
Linguistic Oversight — List all supported source and target languages to maintain a clear view of translation options.
Usage Intelligence — Monitor your character count and API limits to maintain strict control over your translation budget.
Glossary Management — List and query configured translation glossaries to ensure consistent brand terminology.
Contextual Tone Control — Translate text enforcing strict formal, informal, or standard business tones instantly.
Markup Preservation — Translate HTML elements while safely preserving tag boundaries and web structure.

The DeepL MCP Server exposes 9 tools through the Vinkius. Connect it to Claude Desktop in under two minutes — no API keys to rotate, no infrastructure to provision, no vendor lock-in. Your configuration, your data, your control.

How to Connect DeepL to Claude Desktop via MCP

Follow these steps to integrate the DeepL MCP Server with Claude Desktop.

Open Claude Desktop Settings

Go to Settings → Developer → Edit Config to open claude_desktop_config.json

Add the MCP Server

Paste the configuration above into the mcpServers section

Restart Claude Desktop

Close and reopen Claude Desktop to load the new server

Start using DeepL

Look for the 🔌 icon in the chat — your 9 tools are now available

Why Use Claude Desktop with the DeepL MCP Server

Claude Desktop by Anthropic provides unique advantages when paired with DeepL through the Model Context Protocol.

Claude Desktop is the reference MCP client — it was designed alongside the protocol itself, ensuring the most complete and stable MCP implementation available

Zero-code configuration: add a server URL to a JSON file and Claude instantly discovers and exposes all available tools in the chat interface

Claude's extended thinking capability lets it reason through multi-step tool usage, chaining multiple API calls to answer complex questions

Enterprise-grade security with local config storage — your tokens never leave your machine, and connections go directly to the Vinkius Edge network

DeepL + Claude Desktop Use Cases

Practical scenarios where Claude Desktop combined with the DeepL MCP Server delivers measurable value.

Interactive data exploration: ask Claude to query DNS records, look up WHOIS data, and cross-reference results in a single conversation

Ad-hoc security audits: type a domain name and let Claude enumerate subdomains, check DNS history, and flag configuration anomalies — all through natural language

Executive briefings: generate comprehensive domain intelligence reports by asking Claude to compile findings into a formatted summary

Learning and training: new team members can explore API capabilities conversationally without needing to read documentation

DeepL MCP Tools for Claude Desktop (9)

These 9 tools become available when you connect DeepL to Claude Desktop via MCP:

get_account_glossaries

List configured translation glossaries

get_api_usage

Get current API usage and character limit constraints

get_glossary_dictionary

Get term mapping entries for a specific glossary ID

get_source_languages

List all supported source languages for translation

get_target_languages

g., EN-US, PT-BR) that DeepL can translate TO. List all supported target languages for translation

translate_html_markup

Translate HTML elements while preserving tag structure

translate_text_formal

g., "Sie" in German, "vous" in French) suitable for business communications. Translate text using a formal/business tone

translate_text_informal

g., "du" in German, "tu" in French) suitable for casual platforms. Translate text using an informal/casual tone

translate_text_standard

Translate text into a target language using standard tone

Example Prompts for DeepL in Claude Desktop

Ready-to-use prompts you can give your Claude Desktop agent to start working with DeepL immediately.

"Translate 'Hello world' into Portuguese using DeepL."

"Show me all supported target languages in DeepL."

"What is my current DeepL usage?"

Troubleshooting DeepL MCP Server with Claude Desktop

Common issues when connecting DeepL to Claude Desktop through the Vinkius, and how to resolve them.

Server not appearing after restart

Ensure the JSON is valid (no trailing commas). Check the file path: ~/Library/Application Support/Claude/claude_desktop_config.json (macOS) or %APPDATA%\\Claude\\ (Windows).

Authentication error

Verify your Vinkius token is correct. Go to cloud.vinkius.com to regenerate it if needed.

Tools not showing in chat

Click the 🔌 icon at the bottom of the chat input. If it shows 0 tools, the server may still be connecting — wait a few seconds.

DeepL + Claude Desktop FAQ

Common questions about integrating DeepL MCP Server with Claude Desktop.

How does Claude Desktop discover MCP tools?

When Claude Desktop starts, it reads the claude_desktop_config.json file and connects to each configured MCP server. It calls the tools/list endpoint to fetch the schema for every available tool, then surfaces them as clickable options in the chat interface via the 🔌 icon.

What happens if the MCP server is temporarily unavailable?

Claude Desktop handles disconnections gracefully — if the server is unreachable at startup, the tools simply won't appear. Once the server becomes available again, restarting Claude Desktop will re-establish the connection. There is no timeout penalty or error loop.

Can I connect multiple MCP servers simultaneously?

Yes. You can add as many servers as you need in the mcpServers section of the config file. Each server appears as a separate tool provider, and Claude can use tools from multiple servers in a single conversation turn.

Is there a limit on the number of tools per server?

Claude Desktop can handle hundreds of tools per server. However, for optimal LLM performance, Vinkius servers are designed to expose focused, well-documented tool sets rather than overwhelming the model with too many options.

Does Claude Desktop support Streamable HTTP transport?

Yes. Claude Desktop supports both SSE (Server-Sent Events) and the newer Streamable HTTP transport that Vinkius uses. Simply provide the server URL — Claude auto-negotiates the transport protocol.