Shelfmark

Shelfmark (formerly Calibre Web Automated Book Downloader) is a standalone web application that lets you search, aggregate, and download books and audiobooks from multiple sources in one place. It is designed to act as a download hub that can feed library managers such as Calibre-Web-Automated, Booklore, or Audiobookshelf.

Key Features

• Unified search and browse UI with direct downloads and metadata-driven discovery
• Supports multiple release sources including web sources, torrents, Usenet, and IRC
• Audiobook-focused search and processing support
• Unified download queue with real-time progress and status updates
• Two search modes: direct source search and “universal” search via metadata providers
• Pluggable architecture for adding metadata providers, sources, and download client integrations
• Optional authentication, including proxy auth and reuse of a Calibre-Web user database

Use Cases

• Centralize book and audiobook acquisition before importing into a library manager
• Automate downloads using external indexers/download clients (for example via Prowlarr)
• Run an all-in-one download UI with filtering by format/language and configurable processing

Limitations and Considerations

• Some “universal” features require configuring external metadata providers and API keys
• Access to some sources may require Cloudflare solving/bypass configuration depending on your chosen image and setup

Shelfmark provides an opinionated, practical workflow for discovering and downloading ebooks and audiobooks with minimal setup. It works well as a companion service for building and maintaining a personal digital library and supports extending functionality through its plugin-based design.