Umbra open SAR archive vs Tolstoy Library

In-depth architectural comparison of the Umbra open SAR archive and Tolstoy Library 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?

Feature & Specification Comparison

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": {
    "umbra-open-sar-archive": {
      "command": "uvx",
      "args": [
        "--from"
      ]
    }
  }
}

{
  "mcpServers": {
    "tolstoy-library": {
      "url": "https://platform.gotolstoy.com/settings/mcp?server=library"
    }
  }
}

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