Simples Nacional vs CARF (Recursos Fiscais)

In-depth architectural comparison of the Simples Nacional and CARF (Recursos Fiscais) 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 Simples Nacional 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 Simples Nacional Details

Choose CARF (Recursos Fiscais) 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 CARF (Recursos Fiscais) Details

Feature & Specification Comparison

Specification	Simples Nacional Developer Tools	CARF (Recursos Fiscais) Developer Tools
Summary	Looks up a company's status in the Simples Nacional tax regime from the CNPJ, including opt-in and b	Looks up proceedings of a person or company at the Administrative Board of Tax Appeals (CARF) from t
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": {
    "simples-nacional": {
      "command": "npx",
      "args": [
        "-y",
        "simples-nacional"
      ]
    }
  }
}

{
  "mcpServers": {
    "carf-recursos-fiscais": {
      "command": "npx",
      "args": [
        "-y",
        "carf-recursos-fiscais"
      ]
    }
  }
}

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