lsp-mcp-rs

MCP server that bridges to any LSP. One binary, multiple language servers.

Build

Code

cargo build --release

Binary: target/release/lsp-mcp-rs.exe

Configure

Create config.toml next to the binary:

toml

[servers.lua]

command = "C:/path/to/lua-language-server.exe"

args = ["--stdio"]

extensions = [".lua"]



[servers.rust]

command = "rust-analyzer"

args = []

extensions = [".rs"]



[servers.python]

command = "pyright-langserver"

args = ["--stdio"]

extensions = [".py"]

Add to Claude Desktop config (claude_desktop_config.json):

config.json

{

  "mcpServers": {

    "lsp": {

      "command": "X:\\path\\to\\lsp-mcp-rs.exe",

      "args": []

    }

  }

}

Tools

Tool	Description
`lsp_hover`	Get docs/type at position
`lsp_definition`	Go to definition
`lsp_references`	Find all references
`lsp_symbols`	List symbols in file
`lsp_diagnostics`	Get errors/warnings
`lsp_servers`	List configured servers

All position arguments are 0-indexed.

How it works

MCP request comes in with a file path
File extension maps to configured LSP server
LSP spawns on first use, stays running
Request forwarded to LSP, response returned via MCP

License

MIT

Authors

DC, KALIC, Stryk9190