Legacy Shield vs Keymaster MCP

In-depth architectural comparison of the Legacy Shield and Keymaster MCP 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?

L

Choose Legacy Shield 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).

Explore Legacy Shield Details

Choose Keymaster MCP 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).

Explore Keymaster MCP Details

Feature & Specification Comparison

Specification	L Legacy Shield Security	Keymaster MCP Security
Summary	Zero-knowledge encrypted vault — persistent, encrypted storage for AI agents. EU-hosted.	Read-only runtime secret retrieval from HashiCorp Vault via Keymaster for autonomous AI agents.
Category & Scope	Security	Security
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": {
    "legacy-shield": {
      "command": "npx",
      "args": [
        "-y",
        "legacy-shield"
      ]
    }
  }
}

{
  "mcpServers": {
    "keymaster-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@akari-os/keymaster-mcp"
      ]
    }
  }
}

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