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Stump
Curating digital comic archives, serialized manga, and electronic book libraries becomes effortless with Stump, a high-performance reading server that streams media collections over OPDS protocols directly to web browsers and e-reader hardware. Readers can organize extensive collections across CBZ, CBR, PDF, and EPUB formats, utilizing automated scanners that extract embedded ComicInfo XML and Calibre metadata tags. The built-in web reader renders high-resolution comic spreads, continuous vertical webtoon scrolls, and reflowable text with customizable color themes, font scaling, and reading direction toggles. Users can highlight passages, create persistent notes inside EPUB editions, and organize complex franchises into custom reading lists, oneshots, and smart filter collections. Bi-directional synchronization integrates with Kobo and KOReader hardware devices, maintaining page progression and bookmark states across handhelds and desktop sessions. Server administrators can configure multi-user access rules, enforce age restriction thresholds, and provision user-scoped API tokens for automated script pipelines and third-party companion tools. GraphQL and REST endpoints expose the entire catalog structure, allowing media collectors to integrate external metadata scrapers and trigger background library indexing tasks. Running on a dedicated VPS on RepoCloud with guaranteed CPU, RAM, and SSD, full root SSH access, and a browser serial console. MIT licensed.
Benefits
- Universal Comic and Ebook Streaming
- Stream massive digital libraries spanning CBZ, CBR, PDF, and EPUB archives over standards-compliant OPDS 1.2 and 2.0 feeds directly to mobile apps, web browsers, and e-ink readers.
- Seamless E-Reader Hardware Synchronization
- Synchronize exact reading progress, bookmarks, and finish states automatically with Kobo e-readers and KOReader devices without manual Calibre cable transfers or third-party cloud sync accounts.
- Rich In-Browser Multi-Format Reader
- Enjoy customizable reading modes including two-page spreads, continuous vertical webtoon scrolling, and reflowable typography with persistent EPUB annotations, margin notes, and high-contrast color themes.
- Granular Multi-User Age Restrictions
- Isolate personal collections and protect household members using role-based permissions, explicit content filters, age-rating thresholds, and secure user-scoped API keys for third-party client integrations.
Features
- Dual OPDS Feed Protocols
- Expose both XML-based OPDS 1.2 with Page Stream Extension and modern JSON-based OPDS 2.0 catalogs for universal e-reader and mobile client streaming.
- KOReader and Kobo Sync
- Synchronize reading progression, percentage positions, and timestamps bi-directionally with KOReader firmware and native Kobo device sync APIs.
- Multi-Format Reading Engine
- Read CBZ, CBR, PDF, and EPUB files directly in the browser with vertical webtoon scrolling, double-page comic spreads, and EPUB highlight annotations.
- Smart Lists and Collections
- Aggregate books dynamically using custom rule filters, series groupings, reading lists, and standalone oneshot comic catalog management.
- GraphQL and REST Endpoints
- Query library metadata, manage reading sessions, and trigger asynchronous directory index scans programmatically via documented GraphQL and REST APIs.