language-server-mcp MCP Server

What is language-server-mcp?

language-server-mcp is a TypeScript-based Model Context Protocol (MCP) server that provides language support features for code editing, including hover information, code completion suggestions, and diagnostic reporting. It is designed for developers using MCP-compatible clients like Claude Desktop, and has been tested with TypeScript while theoretically supporting Python.

How to use language-server-mcp?

Install dependencies with npm install, build with npm run build, and add the server configuration to your MCP client (e.g., Claude Desktop's claude_desktop_config.json). Use the exposed tools — get_hover, get_completions, and get_diagnostics — by providing the required parameters (languageId, filePath, content, line, character where applicable).

Key features of language-server-mcp

• Provides hover information for symbols in code
• Offers code completion suggestions
• Reports diagnostic information (errors, warnings)
• Integrates with the Model Context Protocol
• Exposes language features as MCP tools
• Debuggable using the MCP Inspector

Use cases of language-server-mcp

• Getting hover information for a symbol at a specific position
• Obtaining code completion suggestions at a cursor location
• Retrieving diagnostic information (errors/warnings) for a document