AI Runtime Guard vs Shield

In-depth architectural comparison of the AI Runtime Guard and Shield 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 AI Runtime Guard when:

• You need dedicated capabilities in the Security domain.
• You prefer local stdio subprocess transport architecture.
• Your security boundary fits: No auth required (Free / Open Source).
• You have access to required keys: AIRG_WORKSPACE, AIRG_AGENT_ID.
• Primary tools included: Policy enforcement on every file and shell action, Destructive command blocking and backup-before-write, Human approval gating via local GUI or API.

Explore AI Runtime Guard Details

Choose Shield when:

• You need dedicated capabilities in the Security domain.
• You prefer local stdio subprocess transport architecture.
• Your security boundary fits: No auth required (Free / Open Source).
• Primary tools included: Pre-execution MCP call guardrails, TOFU tool-catalog pinning, Tool description and result scanning.

Feature & Specification Comparison

Specification	AI Runtime Guard jimmyracheta Security	Shield AperionAI Security
Summary	Runtime policy enforcement for AI agents - prevents accidental damage to your systems, unauthorized agent access and automates backup-before-write for any touched files.	Local guardrail proxy for AI coding agents. Wraps any MCP server (stdio or Streamable HTTP) and blocks destructive tool calls — DROP TABLE, rm -rf, force-push — before they execute. MCP supply-chain protection: TOFU tool-catalog pinning against rug pulls, plus tool-description and tool-result scanning for tool poisoning and prompt injection. 51 starter rules, approval gates, audit logging. Single binary, Apache-2.0.
Category & Scope

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": {
    "jimmyracheta-ai-runtime-guard": {
      "command": "uvx",
      "args": [
        "ai-runtime-guard"
      ],
      "env": {
        "AIRG_WORKSPACE": "YOUR_AIRG_WORKSPACE_HERE",
        "AIRG_AGENT_ID": "YOUR_AIRG_AGENT_ID_HERE"
      }
    }
  }
}

{
  "mcpServers": {
    "aperionai-shield": {
      "command": "npx",
      "args": [
        "-y",
        "@modelcontextprotocol/server-postgres"
      ]
    }
  }
}

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