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
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