Agent Guardrail MCP Server vs Hush

In-depth architectural comparison of the Agent Guardrail MCP Server and Hush 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 Agent Guardrail MCP Server when:

• You need dedicated capabilities in the Developer Tools domain.
• You prefer local stdio subprocess transport architecture.
• Your security boundary fits: No auth required (Free / Open Source).

Explore Agent Guardrail MCP Server Details

Choose Hush when:

• You need dedicated capabilities in the Developer Tools domain.
• You prefer local stdio subprocess transport architecture.
• Your security boundary fits: No auth required (Free / Open Source).

Explore Hush Details

Feature & Specification Comparison

Specification	Agent Guardrail MCP Server Developer Tools	Hush Developer Tools
Summary	Action-level governance for AI agents -- control what they DO, not what they SAY	A secret store for AI agents: the agent never sees the plaintext.
Category & Scope	Developer Tools	Developer Tools
Quality signal

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": {
    "agent-guardrail-mcp-server": {
      "command": "uvx",
      "args": [
        "agent-guardrail"
      ]
    }
  }
}

{
  "mcpServers": {
    "hush": {
      "command": "npx",
      "args": [
        "-y",
        "@royashbrook/hush"
      ]
    }
  }
}

Related MCP Server Comparisons