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pyscn

pyscn is an MCP server that adds developer tools to AI assistants such as Claude Desktop, Claude Code and Cursor. Python code analysis for AI agents: complexity, dead code, clones, coupling, and a health score. It has 1,096 GitHub stars, is released under the MIT license and runs locally with uvx pyscn-mcp.

github.com/ludo-technologies/pyscn (opens in a new tab)

Data as of from the GitHub API and the official MCP registry; description from the project's repository. Report an error

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Install pyscn

Generated from the server's MCP registry entry. Replace your-value with your own values.

Claude Desktop

claude_desktop_config.json
{
  "mcpServers": {
    "pyscn": {
      "command": "uvx",
      "args": [
        "pyscn-mcp"
      ],
      "env": {
        "PYSCN_CONFIG": "your-value"
      }
    }
  }
}

Settings > Developer > Edit Config. macOS: ~/Library/Application Support/Claude/, Windows: %APPDATA%\Claude\. Restart Claude Desktop afterwards.

Claude Code

claude mcp add --env PYSCN_CONFIG=your-value --transport stdio pyscn -- uvx pyscn-mcp

Cursor

.cursor/mcp.json
{
  "mcpServers": {
    "pyscn": {
      "type": "stdio",
      "command": "uvx",
      "args": [
        "pyscn-mcp"
      ],
      "env": {
        "PYSCN_CONFIG": "your-value"
      }
    }
  }
}

Project file; use ~/.cursor/mcp.json to enable it in every project.

VS Code

.vscode/mcp.json
{
  "servers": {
    "pyscn": {
      "type": "stdio",
      "command": "uvx",
      "args": [
        "pyscn-mcp"
      ],
      "env": {
        "PYSCN_CONFIG": "your-value"
      }
    }
  }
}

Config formats checked against the official docs on Oct 7, 2026: modelcontextprotocol.io (opens in a new tab), code.claude.com (opens in a new tab), cursor.com (opens in a new tab), code.visualstudio.com (opens in a new tab).

Environment variables

Variables the server reads at startup.

NameRequiredDescription
PYSCN_CONFIGNoPath to a .pyscn.toml configuration file. Defaults to the usual config discovery (.pyscn.toml, then pyproject.toml) starting from the analyzed directory.

About pyscn

Code quality analysis for Python in the age of AI coding. Building with Cursor, Claude, or ChatGPT? pyscn keeps AI-generated code maintainable with structural analysis.

  • architecture-analysis
  • clone-detection
  • code-complexity
  • dependency-analysis
  • python
  • static-analysis
  • dead-code-detection

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FAQ

pyscn FAQ

Still curious? Email info@appsgit.com.

How do I install the pyscn MCP server?

Add the command uvx pyscn-mcp to your MCP client: put it in claude_desktop_config.json for Claude Desktop, run claude mcp add for Claude Code, or add it to .cursor/mcp.json (Cursor) or .vscode/mcp.json (VS Code). The snippets on this page are ready to paste.

Is pyscn free?

The server is open source under the MIT license, so running it is free. It does not declare any required API key.

Is pyscn actively maintained?

The most recent commit was on Oct 26, 2026. The latest release is v1.33.0, published Oct 24, 2026. appsgit only lists MCP servers with a commit in the last six months.