Calibre MCP Server

What the code does

We read the source, 22 h ago · rules 3dff92dd89df

What this server is able to do. For an MCP server this is often the job itself — a terminal server runs commands because that is what it is for. Listed so you know what you are plugging in, not as an accusation.

    const child = spawn(bin, args as string[], { detached: true });

    const ebookConvertPath = dbDir === "." ? "ebook-convert" : path.join(dbDir, convertName);

Is this your server and something here is wrong? Tell us — corrections are free and do not require a plan.

Connect this server

This server runs on your own machine — install it with the package manager and the client starts it for you. Package name taken from the official registry entry.

claude mcp add calibre-mcp -- npx -y calibre-mcp

{
  "mcpServers": {
    "calibre-mcp": {
      "args": [
        "-y",
        "calibre-mcp"
      ],
      "command": "npx"
    }
  }
}

[mcp_servers.calibre-mcp]
command = "npx"
args = ["-y", "calibre-mcp"]

{
  "mcpServers": {
    "calibre-mcp": {
      "args": [
        "-y",
        "calibre-mcp"
      ],
      "command": "npx"
    }
  }
}

{
  "mcpServers": {
    "calibre-mcp": {
      "args": [
        "-y",
        "calibre-mcp"
      ],
      "command": "npx"
    }
  }
}

This one needs environment variables set before it will start: CALIBRE_MCP_SERVER_URL (Calibre Content Server base URL (default http://localhost:8080)), CALIBRE_MCP_LIBRARY (Library name; empty = auto-detect the server's default library), CALIBRE_MCP_ENABLE_WRITE (Set to 1 to enable the write tools (update/bulk-update/add/remove); off by default), CALIBRE_MCP_CALIBREDB_PATH (Path to the calibredb binary; empty = auto-discover the standard install location). The author declared them in the registry entry; get the values from the project itself.