Calibre Web vs Affset

In-depth architectural comparison of the Calibre Web and Affset 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 Calibre Web 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: search_books, list_books, list_shelves.

Explore Calibre Web Details

Choose Affset 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: whoami, get_stats, list_campaigns.

Explore Affset Details

Feature & Specification Comparison

Specification	Calibre Web Developer Tools	Affset Developer Tools
Summary	Read-only MCP server for Calibre-Web: library search, browsing and covers via the OPDS feed	Run affset from chat: stats, campaigns, zones, payouts, targeting, and team.
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": {
    "calibre-web": {
      "command": "npx",
      "args": [
        "-y",
        "calibreweb-mcp"
      ]
    }
  }
}

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

Related MCP Server Comparisons