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MCP Language Server
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MCP Language Server

A language server tool based on the MCP protocol, providing precise code analysis capabilities for LLMs
Developer toolsArtificial intelligence chatbots#Code analysis#Language server#Development tool#MCP protocol.Go
3.5 points
227

What is the MCP Language Server?

The MCP Language Server is a bridge tool that integrates the standard Language Server Protocol (LSP) capabilities into the Model Context Protocol (MCP) ecosystem. This enables AI assistants like Claude to directly access the capabilities of professional development tools such as code analysis, autocompletion, and error checking.

How to use the MCP Language Server?

You need to install the corresponding language servers (such as pyright, gopls, etc.), and then configure the path and workspace of the MCP Language Server in the MCP client (such as Claude Desktop). After the configuration is complete, the AI assistant can use various code analysis tools.

Use cases

It is particularly suitable for working in large codebases when you need an AI assistant to understand complex code structures, find references, rename symbols, or perform precise code editing.

Main features

Read definitionGet the full source code definition of a symbol (function, type, constant, etc.)
Find referencesLocate all usage locations of a symbol in the codebase
Get diagnosticsProvide error and warning information in a file
Code lensDisplay additional context and executable actions for the code
Rename symbolRename a symbol throughout the project

Advantages and limitations

Advantages
Enable AI assistants to obtain professional IDE-level code understanding capabilities
Support multiple programming languages (through different language servers)
Precise code editing and refactoring capabilities
Open source and extensible
Limitations
Require pre - installation and configuration of language servers
Currently in the pre - testing phase, there may be stability issues
Some advanced features are not yet implemented

How to use

Install the Go language environment
Download and install Go from golang.org/doc/install
Install the MCP Language Server
Install the latest version using the go install command
Install the language server
Install the corresponding language server according to your programming language
Configure the MCP client
Add server configuration in MCP clients such as Claude Desktop

Usage examples

Understand a complex functionWhen an AI assistant needs to understand the implementation details of a complex function
Refactor codeWhen you need to rename a widely used variable
Fix errorsWhen a type error occurs in the code

Frequently Asked Questions

Why do I need to install a language server?
Which programming languages are supported?
How to debug issues?

Related resources

GitHub repository
Project source code and latest updates
Language Server Protocol documentation
Official documentation of the LSP protocol
Model Context Protocol
Information related to the MCP protocol
Installation
Copy the following command to your Client for configuration
{
  "mcpServers": {
    "language-server": {
      "command": "mcp-language-server",
      "args": [
        "--workspace",
        "/Users/you/dev/yourcodebase",
        "--lsp",
        "/opt/homebrew/bin/pyright-langserver",
        "--",
        "--stdio"
      ],
      "env": {
        "LOG_LEVEL": "INFO"
      }
    }
  }
}

{
  "mcpServers": {
    "language-server": {
      "command": "/full/path/to/your/clone/mcp-language-server/mcp-language-server",
      "args": [
        "--workspace",
        "/path/to/workspace",
        "--lsp",
        "/path/to/language/server"
      ],
      "env": {
        "LOG_LEVEL": "DEBUG"
      }
    }
  }
}
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