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Heimdall

Verified Integration
Author: @AnubhavMadhav•Category: ServerApplication
GitHub Repository
JSON-RPC 2.0
Protocol Standard
Sub-second
Execution Latency
Active
Operational Status
Tags:#Claude#Search#Database#API#Git#AI#GitHub#Node.js#PostgreSQL

Client Configuration

— Connect Heimdall to Claude Desktop or Cursor in seconds
{
  "mcpServers": {
    "heimdall-2": {
      "command": "npx",
      "args": [
        "-y",
        "@modelcontextprotocol/server-heimdall-2"
      ],
      "env": {}
    }
  }
}
Paste into ~/Library/Application Support/Claude/claude_desktop_config.json (macOS) or %APPDATA%\Claude\claude_desktop_config.json (Windows).
Architecture & Capabilities

System Overview

Enforces read-only access for Large Language Models querying PostgreSQL databases by strictly parsing SQL queries to prevent data mutation.

Indexed Date

7/23/2026

License

Open Source

Protocol Layer

stdio / SSE RPC

Frequently Asked Questions

Architecture and operational details for Heimdall

Heimdall is a high-security middleware that acts as a Model Context Protocol (MCP) Gatekeeper for PostgreSQL databases. Its main purpose is to allow Large Language Models (LLMs) to query your database for information while strictly blocking any attempt to modify, delete, or destroy data, ensuring read-only access.

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