CNPJ vs Loupe: free citation lookup

In-depth architectural comparison of the CNPJ and Loupe: free citation lookup 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 CNPJ when:

• You need dedicated capabilities in the Legal domain.
• You prefer remote streaming HTTP/SSE transport architecture.
• Your security boundary fits: No auth required (Free / Open Source).

Explore CNPJ Details

L

Choose Loupe: free citation lookup when:

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

Explore Loupe: free citation lookup Details

Feature & Specification Comparison

Specification	CNPJ Legal	L Loupe: free citation lookup Legal
Summary	Free Brazilian CNPJ lookup (legal name, status, partners) + lawsuit discovery. Public data, no login	Check if a US legal citation exists, names its case and has a valid pin cite; or find a case. Free.
Category & Scope	Legal	Legal
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": {
    "cnpj": {
      "url": "https://api.mcp.ai/p_cnpj"
    }
  }
}

{
  "mcpServers": {
    "loupe-free-citation-lookup": {
      "command": "npx",
      "args": [
        "-y",
        "loupe-free-citation-lookup"
      ]
    }
  }
}

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