WOCLUB Protocol Gym vs Zerosmtp

In-depth architectural comparison of the WOCLUB Protocol Gym and Zerosmtp 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?

W

Choose WOCLUB Protocol Gym 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 WOCLUB Protocol Gym Details

Choose Zerosmtp 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 Zerosmtp Details

Feature & Specification Comparison

Specification	W WOCLUB Protocol Gym Developer Tools	Zerosmtp Developer Tools
Summary	Free daily constraint challenges with deterministic evaluation for AI agents.	A free SMTP relay that still takes a username and password, for devices that cannot do OAuth 2.0.
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": {
    "woclub-protocol-gym": {
      "command": "npx",
      "args": [
        "-y",
        "woclub-protocol-gym"
      ]
    }
  }
}

{
  "mcpServers": {
    "zerosmtp": {
      "command": "npx",
      "args": [
        "-y",
        "zerosmtp-check"
      ]
    }
  }
}

Related MCP Server Comparisons