MCP Server Motherduck vs Legion MCP

In-depth architectural comparison of the MCP Server Motherduck and Legion 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?

Choose MCP Server Motherduck when:

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

Explore MCP Server Motherduck Details

Choose Legion MCP when:

• You need dedicated capabilities in the Databases domain.
• You prefer local stdio subprocess transport architecture.
• Your security boundary fits: other (Free / Open Source).
• You have access to required keys: DB_TYPE, DB_CONFIG, DB_CONFIGS.
• Primary tools included: execute_query, execute_query_json, get_table_columns.

Explore Legion MCP Details

Feature & Specification Comparison

Specification	MCP Server Motherduck Databases	Legion MCP TheRaLabs Databases
Summary	Fast analytics and data processing with DuckDB and MotherDuck	Universal database MCP server supporting multiple database types including PostgreSQL, Redshift, CockroachDB, MySQL, RDS MySQL, Microsoft SQL Server, BigQuery, Oracle DB, and SQLite.
Category & Scope	Databases

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": {
    "mcp-server-motherduck": {
      "command": "uvx",
      "args": [
        "mcp-server-motherduck"
      ]
    }
  }
}

{
  "mcpServers": {
    "theralabs-legion-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@modelcontextprotocol/inspector"
      ],
      "env": {
        "DB_TYPE": "YOUR_DB_TYPE_HERE",
        "DB_CONFIG": "YOUR_DB_CONFIG_HERE",
        "DB_CONFIGS": "YOUR_DB_CONFIGS_HERE"
      }
    }
  }
}

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