LSP MCP

What it does

LSP MCP exposes Language Server Protocol (LSP) functionality over MCP stdio. It provides AI coding agents with deep code intelligence, including jumping to definitions, finding references, and analyzing call hierarchies across multiple programming languages.

Tools

• jump_to_definition: Navigates to the definition of a symbol.
• find_references: Locates all references to a specific symbol.
• symbol_search: Searches for symbols by name across the workspace.
• get_hover_info: Retrieves type signatures and context-aware details.
• get_call_hierarchy: Queries incoming and outgoing function calls.
• get_diagnostics: Fetches lint errors and warnings for the workspace.
• semantic_search: Performs natural language code search using embeddings.
• list_workspace_files: Lists files within the project root.
• read_source_code: Reads source code with specific range support.

Installation

Add the following to your claude_desktop_config.json:

{
  "mcpServers": {
    "lsp-mcp": {
      "command": "cargo",
      "args": [
        "run",
        "--bin",
        "lsp-mcp",
        "--",
        "--workspace-root",
        "/path/to/project"
      ],
      "cwd": "/path/to/project"
    }
  }
}

Supported hosts

Claude Desktop, Cursor, Codex