Package Registry MCP vs Legion MCP

In-depth architectural comparison of the Package Registry MCP 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 Package Registry MCP 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).
• Primary tools included: get-cargo-package-details, search-cargo-packages, list-cargo-package-versions.

Explore Package Registry MCP 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.

Feature & Specification Comparison

Specification	Package Registry MCP artmann Databases	Legion MCP TheRaLabs Databases
Summary	MCP server for searching and getting up-to-date information about NPM, Cargo, PyPi, and NuGet packages.	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": {
    "artmann-package-registry-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "package-registry-mcp"
      ]
    }
  }
}

{
  "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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