Summary
A universal bridge that lets Claude talk to any Language Server Protocol implementation through a single binary. Configure it once with paths to your LSP servers (rust-analyzer, pyright, lua-language-server, etc.), and it routes requests based on file extensions. Exposes six core LSP operations as MCP tools: hover for documentation and types, definition jumping, reference finding, symbol listing, and diagnostics. Servers spawn lazily on first use and stay resident. Reach for this when you want Claude to understand your codebase through the same language intelligence your editor uses, without building separate MCP integrations for each language. Config driven with TOML, works with any LSP that speaks stdio.
Keeps your Mac awake while Claude Code, Codex or Cursor works. Lets it sleep when they are done.
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Get the MCP →lsp-mcp-rs
MCP server that bridges to any LSP. One binary, multiple language servers.
Build
cargo build --release
Binary: target/release/lsp-mcp-rs.exe
Configure
Create config.toml next to the binary:
[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):
{
"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
Featured
Keeps your Mac awake while Claude Code, Codex or Cursor works. Lets it sleep when they are done.
Try free for 7 days →Block distracting apps from your iPhone permanently without a 3rd party app. Free and open source.
Block now (100% free) →Notes, actions and memory. Without a meeting bot. First month 100% off.
Download for free →belt cli automatically finds the best tools and skills for your agent. image, video, music, tts...
one prompt install →Free an open-source skills that make AI coding agents easier to understand, verify, and control.
Download for free →Connect your Claude agent to live crypto prices and trading routes via 1inch
Get the MCP →Categories
Registryactive
Packagehttps://github.com/Stryk91/lsp-mcp-rs/releases/download/v0.1.0/lsp-mcp-rs.exe
TransportSTDIO
UpdatedJan 3, 2026
