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xCOMET MCP Server

@shuji-bonji

基本情報

カテゴリ

その他

トランスポート

stdio

作者

shuji-bonji

投稿者

shuji narumi

xCOMET MCP Server について

xCOMET MCP Server provides AI agents with the ability to evaluate machine translation quality. It integrates with the xCOMET model from Unbabel to provide:

#xcomet#machine-translation#quality-evaluation

xCOMET MCP Server の設定

以下の設定を使って、このサーバーを MCP 対応クライアントに追加してください。

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

xCOMET MCP Server のツール

ツール一覧はまだありません

この掲載には表示できるツール一覧がまだありません。サーバーにツールがないという意味ではありません。対応機能はプロジェクトのドキュメントをご確認ください。

上のボタンで一時的なサンドボックスでこのサーバーを実行し、ツール一覧を取得できます。

概要

What is xCOMET MCP Server?

xCOMET MCP Server is a translation quality evaluation server powered by the xCOMET model from Unbabel. It provides AI agents with quality scoring, error detection, and batch processing capabilities for machine translation.

How to use xCOMET MCP Server?

Install the server via npm and configure it in your MCP host (e.g., Claude Desktop) using the command npx -y xcomet-mcp-server. Use the provided tools (xcomet_evaluate, xcomet_detect_errors, xcomet_batch_evaluate) to evaluate translation quality. Optionally set environment variables for model selection, transport mode (stdio or http), and GPU acceleration.

Key features of xCOMET MCP Server

  • Quality scoring on a 0–1 scale
  • Error detection with minor, major, and critical severity levels
  • Batch evaluation of up to 500 translation pairs
  • GPU support for accelerated inference
  • Persistent model loading for up to 177x speedup on consecutive requests
  • Designed to integrate with other MCP servers like DeepL

Use cases of xCOMET MCP Server

  • Evaluate machine translation quality for single or batch translations
  • Detect and categorize translation errors with severity ratings
  • Combine with translation MCP servers to create iterative quality workflows
  • Quality assurance and post-editing guidance for localization projects

よくある質問

1

What models are supported and what are their memory requirements?

Three models are supported: `Unbabel/XCOMET-XL` (3.5B parameters, ~14GB size, ~8–10GB RAM), `Unbabel/XCOMET-XXL` (10.7B parameters, ~42GB size, ~20GB RAM), and `Unbabel/wmt22-comet-da` (580M parameters, ~2GB size, ~3GB RAM). The latter requires a reference translation.

2

How does the persistent server architecture work?

The server keeps the xCOMET model loaded in memory using an internal Python FastAPI server. The first request loads the model (25–90 seconds), subsequent requests run in ~500ms. Optionally, set `XCOMET_PRELOAD=true` to load the model at startup.

3

What transport modes are available?

The server supports `stdio` (default) and `http` transport modes. Set the `TRANSPORT` environment variable to `http` and optionally configure `PORT` (default 3000) for remote access.

4

How do I specify the Python executable path?

Set the `XCOMET_PYTHON_PATH` environment variable to an explicit Python path. Otherwise, the server auto-detects Python from pyenv, Homebrew, or the system path.

5

What does the quality score mean?

| Score Range | Quality | Recommendation | |-------------|------------|----------------------------| | 0.9 – 1.0 | Excellent | Ready for use | | 0.7 – 0.9 | Good | Minor review recommended | | 0.5 – 0.7 | Fair | Post-editing needed | | 0.0 – 0.5 | Poor | Re-translation recommended |

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