Magic MCP vs SaC — Software as Content

In-depth architectural comparison of the Magic MCP and SaC — Software as Content 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 Magic MCP when:

• You need dedicated capabilities in the Developer Tools domain.
• You prefer local stdio subprocess transport architecture.
• Your security boundary fits: API Key required (Paid Service).
• You have access to required keys: TWENTY_FIRST_API_KEY, API_KEY_21ST.
• Primary tools included: UI component generation, Component, theme, and template search, Design inspiration lookup.

Explore Magic MCP Details

Choose SaC — Software as Content when:

• You need dedicated capabilities in the Developer Tools domain.
• You prefer local stdio subprocess transport architecture.
• Your security boundary fits: API Key required (BYOK (Pay Provider Direct)).
• Primary tools included: Generate live React applications, Evolve apps across conversation turns, Handle app clicks and chat messages.

Feature & Specification Comparison

Specification	Magic MCP 21st-dev Developer Tools	SaC — Software as Content Developer Tools
Summary	Create crafted UI components inspired by the best 21st.dev design engineers.	Give your AI agent the ability to respond with live, interactive apps that evolve.
Category & Scope	Developer Tools	Developer Tools

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": {
    "21st-dev-magic-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@21st-dev/cli@latest"
      ],
      "env": {
        "TWENTY_FIRST_API_KEY": "YOUR_TWENTY_FIRST_API_KEY_HERE",
        "API_KEY_21ST": "YOUR_API_KEY_21ST_HERE"
      }
    }
  }
}

{
  "mcpServers": {
    "sac-software-as-content": {
      "command": "uvx",
      "args": [
        "sac-sdk"
      ]
    }
  }
}

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