lsp-mcp-standalone

lsp-mcp-standalone

Exposes LSP features (definition, hover, references, etc.) over MCP, spawning an isolated language server process per project.

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README

Universal LSP MCP (Standalone)

A VS Code extension that exposes LSP features (definition / hover / references / declaration / document symbols) over MCP, using an isolated language server process spawned by the extension itself.

Key properties:

  • Zero global-settings pollution: the extension spawns its own gopls process; it does NOT touch any go.* VS Code setting, so other projects' native gopls / code navigation keep working.
  • Multi-repo aware: it reads VS Code workspaceFolders and passes them to gopls, so cross-repo symbols defined in other modules resolve.
  • Direct LSP requests: it calls gopls via textDocument/definition etc. directly, bypassing the vscode.executeDefinitionProvider documentSelector limitation that makes other MCP bridges fail on cross-folder files.

Build & install

pnpm install
pnpm build
pnpm package      # produces lsp-mcp-standalone.vsix

Install the vsix in your VS Code / VSCode-Server, then add to your project's mcp.json:

{
  "mcpServers": {
    "lsp-mcp-standalone": {
      "url": "http://127.0.0.1:9528/mcp"
    }
  }
}

Tools

  • definition(uri, line, character)
  • declaration(uri, line, character)
  • hover(uri, line, character)
  • references(uri, line, character)
  • document_symbols(uri)

All positions are 1-based (matching editor display).

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