Ucn MCP Server

by mleoca Your server? Claim it

local only

Ucn runs on your own machine — the client starts it, so there is no endpoint to ping. 747 installs a week from npm. Last commit 15 Oct 2026.

Auditable, conserved AST code intelligence for AI agents. JS/TS, Python, Go, Rust, Java, C/C++, C#.

Installs per day peak 577 · avg 132 · +86% w/w

a month agotoday

747

Installs / week

npm · ucn

Stars

0 open issues

15 Oct 2026

Last commit

24 releases in 90 days

MIT

License

JavaScript

What the code does

We read the source, 3 d ago · rules 995398eba69f

Capabilities

What this server is able to do. For an MCP server this is often the job itself — a terminal server runs commands because that is what it is for. Listed so you know what you are plugging in, not as an accusation.

Executes code built at runtime assets/readme/render-animation.cjs:41

    vm.runInNewContext(source, {

Builds a file path from a variable core/analysis.js:1061, core/bridge.js:1902, core/brief.js:164 и ещё 29

                return rel && _importReaches(index, path.join(index.root, rel), targetFiles);

Page executes code built at runtime assets/readme/ucn-evidence-graph.html:771

  if (k >= 0 && t >= T_OK) acc2.innerHTML = escapeHtml(s2.slice(0, k)) + `<span style="color:var(--ok);font-weight:600">${escapeHtml(s2.slice(k))}</span>`; else acc2.textContent = s2;

Is this your server and something here is wrong? Tell us — corrections are free and do not require a plan.

This code can reach further than it looks

We found places where it runs commands, builds paths or queries from values it is given. None of that is a flaw by itself — it becomes one when the code changes, and code changes quietly between releases. We re-read it on every one.

Connect this server

This server runs on your own machine — install it with the package manager and the client starts it for you. Package name taken from the official registry entry.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add ucn -- npx -y ucn

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "ucn": {
      "command": "npx",
      "args": [
        "-y",
        "ucn"
      ]
    }
  }
}

~/.codex/config.toml

[mcp_servers.ucn]
command = "npx"
args = ["-y", "ucn"]

.cursor/mcp.json

{
  "mcpServers": {
    "ucn": {
      "command": "npx",
      "args": [
        "-y",
        "ucn"
      ]
    }
  }
}

.vscode/mcp.json

{
  "servers": {
    "ucn": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "ucn"
      ]
    }
  }
}

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Ucn — questions

Answers built from our own checks of this server.

Why is there no uptime for Ucn?

Ucn runs on your own machine over stdio — there is no network address to reach, so uptime cannot be measured for it by anyone. What can be measured is adoption: the npm package ucn was installed 747 times last week.

How do I connect Ucn?

Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It runs locally, so the command pulls ucn straight from npm; nothing to host, nothing to sign up for.

How many people use Ucn?

The npm package ucn was installed 747 times in the last week. Week over week that is +86%. We show installs rather than GitHub stars on purpose: a star is a bookmark, an install is someone actually running it.

Is Ucn open source?

Yes — it is published under the MIT licence, written in JavaScript and 2 stars on GitHub. The source link is on this page, so you can read exactly what it does with your data before you connect it.