Mermaid MCP App vs Hermes Action Bridge

In-depth architectural comparison of the Mermaid MCP App and Hermes Action Bridge 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 Mermaid MCP App 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 Mermaid MCP App Details

Choose Hermes Action Bridge 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).
• Primary tools included: hermes_run, hermes_plan, hermes_capabilities.

Explore Hermes Action Bridge Details

Feature & Specification Comparison

Specification	Mermaid MCP App Developer Tools	Hermes Action Bridge Developer Tools
Summary	MCP App that renders Mermaid diagrams as interactive UI in Claude, VS Code and other MCP clients	Delegate real-world actions from Claude Code, Codex, and other agents to Hermes Agent.
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": {
    "mermaid-mcp-app": {
      "command": "npx",
      "args": [
        "-y",
        "mermaid-mcp-app",
        "--stdio"
      ]
    }
  }
}

{
  "mcpServers": {
    "hermes-action-bridge": {
      "command": "npx",
      "args": [
        "-y",
        "skills"
      ]
    }
  }
}

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