Postgres MCP vs DB Query Guard MCP

In-depth architectural comparison of the Postgres MCP and DB Query Guard 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 Postgres MCP when:

• You need dedicated capabilities in the Databases domain.
• You prefer local stdio subprocess transport architecture.
• Your security boundary fits: API Key required (Free / Open Source).
• You have access to required keys: DATABASE_URI.
• Primary tools included: Database health checks including index, vacuum, replication, and cache analysis, Industrial-strength index tuning algorithms, EXPLAIN plan validation and hypothetical index simulation.

Explore Postgres MCP Details

D

Choose DB Query Guard 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).

Explore DB Query Guard MCP Details

Feature & Specification Comparison

Specification	Postgres MCP crystaldba Databases	D DB Query Guard MCP Databases
Summary	All-in-one MCP server for Postgres development and operations, with tools for performance analysis, tuning, and health checks	Paid remote MCP for governed database query review, SQL simulation, approvals, and audits.
Category & Scope	Databases	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": {
    "crystaldba-postgres-mcp": {
      "command": "uvx",
      "args": [
        "postgres-mcp"
      ],
      "env": {
        "DATABASE_URI": "YOUR_DATABASE_URI_HERE"
      }
    }
  }
}

{
  "mcpServers": {
    "db-query-guard-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "db-query-guard-mcp"
      ]
    }
  }
}

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