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metals-mcp-launcher

v0.1.3

Published

a month ago

Scala Metals MCP launcher

0High
0Medium
0Low

metals scala lsp mcp language-server scala-language-server

Metals MCP Launcher

A standalone launcher that runs the Metals language server with MCP (Model Context Protocol) support, enabling AI assistants like Claude to interact with Scala projects.

Installation

npm install -g metals-mcp-launcher

Or run directly with npx:

npx metals-mcp-launcher /path/to/scala/project

Usage

metals-mcp-launcher [OPTIONS] [PROJECT_PATH]

Options:
  -v, --verbose    Enable verbose logging
  -h, --help       Show help message

Requirements

Java 11 or higher (for running Metals)
Metals installed via Coursier (cs install metals) or available in PATH
Scala project with build.sbt, project.scala, or .scala files

Configuration

Using with Claude Code

Once the launcher is running, configure Claude Code to use the MCP server:

claude mcp add --transport sse metals http://localhost:60013/sse

The tool automatically looks for MCP configuration files in:

.metals/mcp.json
.cursor/mcp.json
.vscode/mcp.json

License

Apache-2.0