MCP server for DeepL translation API
MCP server for DeepL translation API. That is what the deepl mcp server brings to an AI assistant: the same capability, reachable through the Model Context Protocol rather than a separate app or dashboard.
A Model Context Protocol (MCP) server that exposes DeepL text translation, document translation, rephrasing, and glossary and style rule lookups as MCP tools.
The server publishes 14 tools. What each one is for:
translate — document reads and writes files on the machine running the server. Without outputFile, the output path is derived from the input by appending thetranslate-text — Translates text into a target languagetranslate-document — Translates a document file (PDF, DOCX, PPTX, XLSX, HTML, TXT, and more) and writes the result to diskrephrase-text — Rephrases text, optionally into another languageget-source-languages — Lists the language codes accepted as a translation sourceget-target-languages — Lists the language codes accepted as a translation targetget-writing-styles — Lists the style values rephrase-text acceptsget-writing-tones — Lists the tone values rephrase-text acceptslist-glossaries — Lists every glossary in the account with its id, name, dictionaries, and creation timeget-glossary-info — Returns the same metadata as list-glossaries for a single glossaryget-glossary-dictionary-entries — Returns the term entries of one glossary dictionary, meaning one language pair in one directionlist-style-rules — Lists the style rules in the account with their id, name, language, and timestampsThe server ships on npm as deepl-mcp-server, so your MCP client can launch it on demand — there is no separate build step. Add the server block to your client's configuration, restart it, and the tools register themselves.
Configuration is passed through the environment: DEEPL_API_KEY. Treat anything key-shaped as a real credential — scope it to the minimum the server needs, and rotate it if it ever lands in a shared config.
Among the developer tooling options, the useful question is rarely "what can it do" but "what does it cost you to run" — permissions, credentials, and how much of your context its toolset consumes. Deepl's toolset — translate, translate-text, translate-document and 11 more — is a fair guide to whether it matches your workflow. It is maintained by DeepLcom; worth a glance at recent repository activity before you build anything load-bearing on it.
This entry was verified against Deepl's own documentation before publication; SyncDev keeps the directory reviewed rather than auto-generated.
| Tool | What it does |
|---|---|
| translate | document reads and writes files on the machine running the server. Without outputFile, the output path is derived from the input by appending the target language code, for example report_de.pdf. With outputFormat, the de |
| translate-text | Translates text into a target language. |
| translate-document | Translates a document file (PDF, DOCX, PPTX, XLSX, HTML, TXT, and more) and writes the result to disk. |
| rephrase-text | Rephrases text, optionally into another language. |
| get-source-languages | Lists the language codes accepted as a translation source. |
| get-target-languages | Lists the language codes accepted as a translation target. |
| get-writing-styles | Lists the style values rephrase-text accepts. |
| get-writing-tones | Lists the tone values rephrase-text accepts. |
| list-glossaries | Lists every glossary in the account with its id, name, dictionaries, and creation time. |
| get-glossary-info | Returns the same metadata as list-glossaries for a single glossary. |
| get-glossary-dictionary-entries | Returns the term entries of one glossary dictionary, meaning one language pair in one direction. |
| list-style-rules | Lists the style rules in the account with their id, name, language, and timestamps. |
| get-style-rule | Returns one style rule in full, including its configured rules and custom instructions. |
| get-custom-instruction | Returns a single custom instruction belonging to a style rule. |
{
"mcpServers": {
"deepl": {
"command": "npx",
"args": ["-y", "deepl-mcp-server"],
"env": {
"DEEPL_API_KEY": "your-value"
}
}
}
}Add to claude_desktop_config.json, then restart Claude Desktop.
| Variable | Description | Required |
|---|---|---|
| DEEPL_API_KEY | Credential the server authenticates with. | Yes |
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