Keymaster MCP vs Yault AESP

In-depth architectural comparison of the Keymaster MCP and Yault AESP 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 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

Y

Choose Yault AESP 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 Yault AESP Details

Feature & Specification Comparison

Specification	Keymaster MCP Security	Y Yault AESP Security
Summary	Read-only runtime secret retrieval from HashiCorp Vault via Keymaster for autonomous AI agents.	Policy-gated vault operations (deposit, redeem, transfer, balance) for 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": {
    "keymaster-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@akari-os/keymaster-mcp"
      ]
    }
  }
}

{
  "mcpServers": {
    "yault-aesp": {
      "command": "npx",
      "args": [
        "-y",
        "yault-aesp"
      ]
    }
  }
}

Related MCP Server Comparisons