MCP Customs vs Agent Output Guard

In-depth architectural comparison of the MCP Customs and Agent Output Guard 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 MCP Customs 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 MCP Customs Details

Choose Agent Output Guard 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 Output Guard Details

Feature & Specification Comparison

Specification	MCP Customs Developer Tools	Agent Output Guard Developer Tools
Summary	Inspect an MCP server for common security risks before you install it. Offline, zero telemetry.	Validate and verify data from other agents before acting on it. Zero LLM costs.
Category & Scope	Developer Tools	Developer Tools

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": {
    "mcp-customs": {
      "command": "npx",
      "args": [
        "-y",
        "mcp-customs"
      ]
    }
  }
}

{
  "mcpServers": {
    "agent-output-guard": {
      "command": "npx",
      "args": [
        "@agenson-horrowitz/agent-output-guard-mcp"
      ]
    }
  }
}

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