gopls (Go Language Server) MCP server

This MCP server wraps gopls to provide Go language server features through the Model Context Protocol (MCP), enabling Claude AI to understand and interact with Go codebases. It offers all gopls language features including code navigation, diagnostics, symbol search, and code formatting.

Installation

Basic Installation

go install github.com/yantrio/mcp-gopls/cmd/mcp-gopls@latest

Requirements

• Go 1.24.3+
• gopls (Go language server)

If you don't have gopls installed, you can install it with:

go install golang.org/x/tools/gopls@latest

Integration with Claude

Setting Up with Claude Code

1. Install mcp-gopls:

   go install github.com/yantrio/mcp-gopls/cmd/mcp-gopls@latest
   

2. Add to Claude Code:

   claude mcp add mcp-gopls "$(which mcp-gopls)"
   

3. Restart Claude Code:

   claude restart
   

4. Verify installation:

   claude mcp list
   

Setting Up with Claude Desktop

1. Install mcp-gopls (as shown above)

2. Edit Claude Desktop configuration:

   • macOS: ~/Library/Application Support/Claude/claude_desktop_config.json
   • Windows: %APPDATA%\Claude\claude_desktop_config.json
   • Linux: ~/.config/Claude/claude_desktop_config.json

3. Add the following to the mcpServers section:

   {
     "mcpServers": {
       "mcp-gopls": {
         "command": "mcp-gopls",
         "args": []
       }
     }
   }
   

   For a custom workspace:

   {
     "mcpServers": {
       "mcp-gopls": {
         "command": "mcp-gopls",
         "args": ["-workspace", "/path/to/your/go/project"]
       }
     }
   }
   

4. Restart Claude Desktop

Usage

Basic Usage

Run with default settings (uses gopls in PATH and current directory as workspace):

mcp-gopls

Advanced Usage Options

Specify gopls path and workspace:

mcp-gopls -gopls /path/to/gopls -workspace /path/to/project

Using environment variables:

export GOPLS_PATH=/path/to/gopls
export MCP_GOPLS_WORKSPACE=/path/to/project
mcp-gopls

Features

The server supports all gopls language server features:

• GoToDefinition: Navigate to the definition of a symbol
• FindReferences: Find all references to a symbol
• GetDiagnostics: Get compile errors and static analysis findings
• Hover: Get information about symbols under the cursor
• SearchSymbol: Search for symbols across the workspace
• RenameSymbol: Rename symbols across the workspace
• FindImplementers: Find all types that implement an interface
• ListDocumentSymbols: Get an outline of symbols defined in a file
• FormatCode: Format Go source code according to gofmt standards
• OrganizeImports: Organize import statements

How to install this MCP server

For Claude Code

To add this MCP server to Claude Code, run this command in your terminal:

claude mcp add-json "mcp-gopls" '{"command":"mcp-gopls","args":[]}'

See the official Claude Code MCP documentation for more details.

For Cursor

There are two ways to add an MCP server to Cursor. The most common way is to add the server globally in the ~/.cursor/mcp.json file so that it is available in all of your projects.

If you only need the server in a single project, you can add it to the project instead by creating or adding it to the .cursor/mcp.json file.

Adding an MCP server to Cursor globally

To add a global MCP server go to Cursor Settings > Tools & Integrations and click "New MCP Server".

When you click that button the ~/.cursor/mcp.json file will be opened and you can add your server like this:

{
    "mcpServers": {
        "mcp-gopls": {
            "command": "mcp-gopls",
            "args": []
        }
    }
}

Adding an MCP server to a project

To add an MCP server to a project you can create a new .cursor/mcp.json file or add it to the existing one. This will look exactly the same as the global MCP server example above.

How to use the MCP server

Once the server is installed, you might need to head back to Settings > MCP and click the refresh button.

The Cursor agent will then be able to see the available tools the added MCP server has available and will call them when it needs to.

You can also explicitly ask the agent to use the tool by mentioning the tool name and describing what the function does.

For Claude Desktop

To add this MCP server to Claude Desktop:

1. Find your configuration file:

• macOS: ~/Library/Application Support/Claude/claude_desktop_config.json
• Windows: %APPDATA%\Claude\claude_desktop_config.json
• Linux: ~/.config/Claude/claude_desktop_config.json

2. Add this to your configuration file:

{
    "mcpServers": {
        "mcp-gopls": {
            "command": "mcp-gopls",
            "args": []
        }
    }
}

3. Restart Claude Desktop for the changes to take effect