Calibre MCP server

Read from the package source without running it. The installed server may list more.

• calibre_add_book

  Import a local ebook file (EPUB/PDF/MOBI/…) into the library. The file must live under an

• calibre_board_data

  Internal endpoint for the in-chat cover-board widget. Returns the cached payload of a

• calibre_build_index

  Build the semantic index for specific books (required: bookId, ids, or query — full-library indexing is deferred). A query selects ALL matching books (no 100-book cap); large selections run long and may outlive the client timeout — re-run the same call to resume, since up-to-date books are skipped. Extracts, chunks, and embeds each book. Set keywordOnly=true (or when the embedding model is absent,

• calibre_bulk_updatewrite action

  Apply the same metadata changes (tags, series, publisher, etc.) to a set of books selected

• calibre_extract_isbn

  Offline scan of a book's own text for a checksum-valid ISBN → sets identifiers:isbn

• calibre_find_duplicates

  Find probable duplicate books. mode=identical (exact title+authors) or similar (fuzzy) group the library (or ids/query/filter subset — filter takes a bundle name) with a merge-safety score; mode=compare diffs 2+ ids field-by-field. Read-only — never merges.

• calibre_get_book

  Get full metadata (authors, ISBN, formats, comments, cover) for one book by its id or uuid (id and bookId are interchangeable — pass the bookId from a search result). Set include_cover=true only when the cover image itself must be inspected.

• calibre_get_content

  Extract a book's text as a capped, fenced excerpt; pass the returned nextCursor token verbatim to walk the whole book, or jump to a char position with offset (e.g. a search passage's charStart). Set structure=true for a chapter map with per-chapter cursors. To find text inside a book, use calibre_search scope=book.

• calibre_get_figures

  List a book's figures — images the text references, identified by caption (Figure 1-2 / Рис. 3.1) — with page + caption per figure, then fetch chosen ones as images via indexes (≤3 per call). Captions let you pick figures before spending image tokens. In MCP Apps hosts the fetched figures also render for the user in an in-chat viewer, so you can point at them by figure number — but describe only w

• calibre_list_categories

  Browse library categories (Authors, Tags, Series, Languages, Publisher). No field → list the categories; with a field → its values + counts, filterable via a valueFilter regex (case-insensitive by default; a leading inline flag like `(?i)` is accepted).

• calibre_list_libraries

  List the Calibre libraries available on the Content Server and which one is the default. Call this first to discover valid library names.

• calibre_manage_bundles

  List, create, update or delete Bundles — named topical filters backed by Calibre saved

• calibre_merge_books

  Merge duplicate book records: moves formats from source books into a target (target's copy

• calibre_open_book

  Internal endpoint for the in-chat widgets' Open button. Launches a book in the local

• calibre_ping

  Health check: confirms the MCP server can reach the running Calibre

• calibre_quality_report

  Scan books for metadata problems: missing fields, raw-filename titles, invalid ISBNs, author-sort mismatches, series gaps. Defaults to the whole library; narrow with ids/query/filter (a bundle name) or specific checks. Read-only.

• calibre_recover_metadata

  Propose real metadata for a book with a missing/raw-filename title via online provider lookup (ISBN from its identifiers or text, else title/author) on Open Library and Google Books. Preview only — returns a changes object for calibre_update_book; never writes.

• calibre_remove_bookwrite action

  Remove books from the library. Removed books go to Calibre's Trash and can be restored from

• calibre_search

  Find books by exact title, author, ISBN, tag, or Calibre query syntax (mode=meta), or by full text (mode=fts). scope=book returns short keyword snippets from inside one book; first hits often land in TOC/front matter — for definitional or topic questions within a book prefer calibre_semantic_search scope=book (ranked passages with char offsets). Use calibre_semantic_search for meaning/topic querie

• calibre_semantic_search

  Meaning-based search over the local index. scope=library ranks books; scope=book (needs bookId) ranks passages within one book. target=figures searches figure captions instead of text — use when the user asks for a diagram/chart/schema; hits point at calibre_get_figures for the pixels. mode=hybrid (default) fuses semantic + keyword matches; mode=vector is semantic-only; mode=keyword is exact keywo

• calibre_update_bookwrite action

  Replace metadata fields on one book (title, authors, tags, series, rating, identifiers, comments, or any #custom column). Omitted fields are untouched. Requires writes to be enabled.

• Code scan225 source files scanned20/25
• –Live reliabilityno gateway calls yet and no remote to proben/a
• –Tool poisoningtools not inspected (local package is not executed); not countedn/a
• Auth qualitylocal package, no credentials required12/15
• Maintenancelast push 1 days ago15/15
• Maintainer identityregistry namespace matches repository owner; GitHub account older than a year8/10

Safety score

85/100

higher than 75% of 3,472 Web search servers

Tools

21

the typical Web search server has 5

Tools that change things

14%

typical: 0%. Fewer write tools means less an agent can break

GitHub stars

22

more than 90% of 1,783 Web search servers

Downloads a week

1,129

more than 95% of 816 Web search servers with a package

Grade history

• 2026-11-02restoreB → Ascore 85: eval / new Function used

Calibre: common questions

Is Calibre MCP server safe?

Yes, by our scan: it is graded A (85/100). Read the Calibre safety report

How do I install Calibre?

It runs on your machine. Copy the Claude Code, Cursor, VS Code or Claude Desktop config from the install section.

Does Calibre need an API key?

No secret keys are declared. It reads 4 settings from the environment.

Is Calibre maintained?

The last commit was in the last day (2026-11-01). The latest release is v0.12.0.

What can I use instead of Calibre?

Servers from other publishers that do the same job: Zotero MCP server, Internet Archive MCP server and Zotero MCP server.

How does Calibre compare with other Web search MCP servers?

safety score 85/100 (higher than 75% of 3,472 Web search servers); tools 21 (the typical Web search server has 5); tools that change things 14% (typical: 0%. Fewer write tools means less an agent can break). Full comparison.