Gatekeeper vs Platform

In-depth architectural comparison of the Gatekeeper and Platform 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 Gatekeeper 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: Policy-based allow, deny, and approval decisions, Sensitive-boundary rule pack, USD, token, and call budgets.

Explore Gatekeeper Details

Choose Platform when:

• You need dedicated capabilities in the Security domain.
• You prefer local stdio subprocess transport architecture.
• Your security boundary fits: API Key required (Free / Open Source).
• You have access to required keys: SIDCLAW_API_KEY, SIDCLAW_AGENT_ID.
• Primary tools included: MCP governance proxy, Policy-based allow, deny, and approval decisions, Human review workflows.

Feature & Specification Comparison

Specification	Gatekeeper Security	Platform sidclawhq Security
Summary	Run MCP tool calls through Runestone Gatekeeper — policy enforcement, human approval, audit.	Governance proxy for MCP servers. Wraps any upstream server with policy evaluation, human approval workflows, and hash-chain audit trails. 18+ framework integrations. Apache 2.0 SDK.
Category & Scope	Security

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": {
    "gatekeeper": {
      "command": "npx",
      "args": [
        "-y",
        "@runestone-labs/gatekeeper-mcp"
      ]
    }
  }
}

{
  "mcpServers": {
    "sidclawhq-platform": {
      "command": "npx",
      "args": [
        "-y",
        "sidclaw-demo"
      ],
      "env": {
        "SIDCLAW_API_KEY": "YOUR_SIDCLAW_API_KEY_HERE",
        "SIDCLAW_AGENT_ID": "YOUR_SIDCLAW_AGENT_ID_HERE"
      }
    }
  }
}

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