DataJud (CNJ) vs Japan Law

In-depth architectural comparison of the DataJud (CNJ) and Japan Law 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 DataJud (CNJ) 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 DataJud (CNJ) Details

Choose Japan Law 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 Japan Law Details

Feature & Specification Comparison

Specification	DataJud (CNJ) Legal	Japan Law Legal
Summary	Public lookup of Brazilian court cases (metadata + docket) via the CNJ/DataJud API. Free, no login.	Japan Law MCP — Japanese national laws & ordinances via the e-Gov Law API.
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": {
    "datajud-cnj": {
      "command": "npx",
      "args": [
        "-y",
        "datajud-cnj"
      ]
    }
  }
}

{
  "mcpServers": {
    "japan-law": {
      "command": "npx",
      "args": [
        "-y",
        "japan-law"
      ]
    }
  }
}

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