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Skylos

Skylos is an MCP server that adds developer tools to AI assistants such as Claude Desktop, Claude Code and Cursor. Dead code, security, secrets detection and code quality for Python, TypeScript, Go. It has 843 GitHub stars, is released under the Apache-2.0 license and runs locally with uvx skylos.

github.com/duriantaco/skylos (opens in a new tab)

View on GitHub (opens in a new tab)

Install Skylos

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

Claude Desktop

claude_desktop_config.json
{
  "mcpServers": {
    "skylos": {
      "command": "uvx",
      "args": [
        "skylos"
      ],
      "env": {
        "SKYLOS_API_KEY": "your-value"
      }
    }
  }
}

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

Claude Code

claude mcp add --env SKYLOS_API_KEY=your-value --transport stdio skylos -- uvx skylos

Cursor

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

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

VS Code

.vscode/mcp.json
{
  "inputs": [
    {
      "type": "promptString",
      "id": "skylos_api_key",
      "description": "SKYLOS_API_KEY",
      "password": true
    }
  ],
  "servers": {
    "skylos": {
      "type": "stdio",
      "command": "uvx",
      "args": [
        "skylos"
      ],
      "env": {
        "SKYLOS_API_KEY": "${input:skylos_api_key}"
      }
    }
  }
}

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
SKYLOS_API_KEYsecretNoSkylos API key for cloud features and MCP authentication

About Skylos

Skylos Open-source, local-first checks for dead code, security issues, secrets, quality regressions, and AI-code mistakes before merge.

  • python
  • code-quality
  • dead-code
  • dead-code-detection
  • devsecops
  • sast
  • static-analysis
  • typescript
  • ai-code-review
  • ai-generated-code

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FAQ

Skylos FAQ

Still curious? Email info@appsgit.com.

What is Skylos?

Skylos is an MCP server that adds developer tools to AI assistants such as Claude Desktop, Claude Code and Cursor. Dead code, security, secrets detection and code quality for Python, TypeScript, Go. It has 843 GitHub stars, is released under the Apache-2.0 license and runs locally with uvx skylos. The source code is at github.com/duriantaco/skylos.

How do I install the Skylos MCP server?

Add the command uvx skylos 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 Skylos free?

The server is open source under the Apache-2.0 license, so running it is free. It needs credentials (SKYLOS_API_KEY) for the service it connects to, which may require a paid account.

Is Skylos actively maintained?

The most recent commit was on Oct 6, 2026. The latest release is v4.45.0, published Oct 5, 2026. appsgit only lists MCP servers with a commit in the last six months and re-checks every server daily.