Get the currently authenticated Hardcover user's profile (id, username, name, book counts).

Search Hardcover for books, authors, series, users, lists, characters, publishers, or prompts. Returns rich result objects from Typesense. query_type defaults to 'book'.

Get full book details by Hardcover book ID.

Get full book details by Hardcover URL slug (e.g. 'the-name-of-the-wind').

Get all known editions of a book by exact title match.

Get detailed information about a specific edition by its ID.

Look up an edition by ISBN-10 or ISBN-13.

Get an author's profile by Hardcover author ID.

Get an author's profile by URL slug (e.g. 'brandon-sanderson').

Get books written by a specific author, ordered by popularity.

Get series metadata (name, description, book count) by series ID.

Get the ordered, deduplicated list of books in a series. Merges duplicates, excludes partial books and compilations.

Get the authenticated user's full library (all statuses), paginated.

Get the authenticated user's books filtered by reading status. Status IDs: 1=Want to Read, 2=Currently Reading, 3=Read, 4=Did Not Finish, 5=Owned.

Get all books currently being read with their page-level progress.

Get the authenticated user's relationship with a specific book (status, rating, review, read sessions).

Get reading journal entries and session history for a specific book.

Look up a public Hardcover user profile by username.

Get another user's library filtered by reading status. Status IDs: 1=Want to Read, 2=Currently Reading, 3=Read, 4=Did Not Finish, 5=Owned.

Get a Hardcover list's details and its books (up to 50 books).

Get reading statistics: total books read all-time AND since an optional date (e.g. '2026-01-01' for this year, '2026-08-01' for this month), plus average rating for each window. Requires the user's numeric ID (use get_me to find it).

List books marked as Read with a finish date between two dates, ordered most-recent first.

Get the authenticated user's reading goals (progress, target, state, dates).

Get a user's recent activity feed (books added, rated, reviewed, goals, lists). Requires the user's numeric ID.

Get recent user activity for a specific book (ratings, reviews, status changes).