Rules MCP vs Skill Builder MCP

In-depth architectural comparison of the Rules MCP and Skill Builder MCP 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?

R

Choose Rules 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 Rules MCP Details

Choose Skill Builder 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 Skill Builder MCP Details

Feature & Specification Comparison

Specification	R Rules MCP Developer Tools	Skill Builder MCP Developer Tools
Summary	MCP for rules/skills/knowledge evaluation for Cursor, Claude, VS Code, and Antigravity.	Search the skill-builder registry and auto-install skills for Claude Code, Cursor, and Codex.
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": {
    "rules-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "rules-mcp"
      ]
    }
  }
}

{
  "mcpServers": {
    "skill-builder-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@dmzagent/skill-builder"
      ]
    }
  }
}

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