Calm MCP vs Rune

In-depth architectural comparison of the Calm MCP and Rune MCP servers. Compare execution transports, security boundaries, tool capabilities, quality scores, and ready-to-paste client installation snippets for Claude, Cursor, Windsurf, and VS Code.

Which MCP Server Should You Choose?

Choose Calm MCP when:

• You need dedicated capabilities in the Developer Tools domain.
• You prefer local stdio subprocess transport architecture.
• Your security boundary fits: No auth required (Free / Open Source).

Explore Calm MCP Details

Choose Rune when:

• You need dedicated capabilities in the Developer Tools domain.
• You prefer local stdio subprocess transport architecture.
• Your security boundary fits: No auth required (Free / Open Source).

Explore Rune Details

Feature & Specification Comparison

Specification	Calm MCP Developer Tools	Rune Developer Tools
Summary	MCP server giving coding agents a call-graph-aware, hash-verified view of a codebase, not grep.	Evidence-traced codebase understanding and security scanning for AI agents over MCP.
Category & Scope	Developer Tools	Developer Tools
Quality signal

Tools & Capabilities Breakdown

Ready-to-Paste Client Configurations

Paste either (or both) of these JSON server blocks into your client config file (e.g. claude_desktop_config.json or ~/.cursor/mcp.json).

{
  "mcpServers": {
    "calm-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@eilodon/calm-mcp"
      ]
    }
  }
}

{
  "mcpServers": {
    "rune": {
      "command": "npx",
      "args": [
        "-p",
        "@moosl/rune",
        "rune",
        "serve",
        "/absolute/path/to/your-project"
      ]
    }
  }
}

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