Rarefaction

io.github.ip2k/rarefaction-lsp-mcp

LSP call graph for coding agents: a symbol's callers, callees, tests and live files in one call.

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Connect this server

Add this to your MCP client config — claude_desktop_config.json (Claude Desktop) or .cursor/mcp.json (Cursor).Suits: Claude Desktop · Cursor.

{
  "mcpServers": {
    "rarefaction-lsp-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "rarefaction-lsp-mcp@0.4.2"
      ]
    }
  }
}

A starting point — check the repository for exact arguments and setup. Restart your client after editing the config.

Category
Developer Tools
Version
0.4.2
Registry
active
Published
10/21/2026

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Show visitors that Rarefaction is listed here — it’s also the link we check for a free listing.

Rarefaction — listed on Serverdex

HTML — for your website

<a href="https://serverdex.io/server/io-github-ip2k-rarefaction-lsp-mcp?utm_source=badge"><img src="https://serverdex.io/brand/badge.svg" alt="Rarefaction — listed on Serverdex" width="123" height="40" loading="lazy"></a>

Recommended. A dofollow link from your own domain is the one that counts for search engines, and it's the link we check for a free listing.

Markdown — for your README

[![Rarefaction — listed on Serverdex](https://serverdex.io/brand/badge.svg)](https://serverdex.io/server/io-github-ip2k-rarefaction-lsp-mcp?utm_source=badge)

Nice for visibility, but GitHub marks README links nofollow, so it doesn't pass authority. Use the HTML badge on your site as well.