Claude
Add BookWriter as a custom connector and finish a book in conversation.
BookWriter MCP
Write an entire book inside the AI assistant you already use.
BookWriter runs an MCP server. Connect it to Claude, ChatGPT, or Cursor and your assistant stops forgetting your book after chapter one — it plans the outline, drafts every chapter, and holds continuity to the last page, keeping every word you write.
MCP server URL
https://www.bookwriter.vip/api/mcp/v1Pick your assistant
The same server, the same 20 tools, the same book — in whichever assistant you already write in. One subscription covers all of them.
ChatGPT
Turn on Developer mode, connect BookWriter, and write the whole thing.
Cursor
One entry in mcp.json makes Cursor a distraction-free writing studio.
New to the Model Context Protocol? Start with the full write-a-book-with-MCP guide. Already connected? Open the complete MCP operating guide.
The write-a-book loop
Set up the book, seed a chapter, hand it off, sharpen, accept — then repeat to the last page. Your words are never overwritten.
- 1
Set up the book
Tell your assistant the premise, genre, and length. create_book spins up a real project — title, word target, and chapter plan — not a blank prompt box it will forget tomorrow.
- 2
Write a seed paragraph
Open the chapter with a paragraph or a few lines in your own words. Those sentences are your seed, kept exactly as you wrote them — verbatim, never overwritten.
- 3
Hand it off
handoff sends your seed to the writing engine, which finishes the chapter in your voice and built around your words — holding continuity against everything written so far.
- 4
Sharpen, then accept
sharpen nudges the draft lighter or stronger until it reads right. accept_chapter locks it in and advances you to the next chapter. Repeat to the final page.
20 tools, all callable in plain language
14 book-writing tools
create_book— Create a persistent book with a title, word goal, and story setup.list_books— List recent books and their current chapter positions.get_book_status— Return the current chapter, accepted count, word goal, and finish or extension state.catch_me_up— Summarize recent chapters, characters, and open story threads.get_credit_status— Show plan availability, book slots used, and the reset date.handoff— Draft the current chapter from an author opener, scene direction, or both.retry_handoff— Generate a different version of the current chapter from revised input.sharpen— Polish the generated portion of the current draft with a lighter or stronger pass.self_edit_chapter— Apply exact find-and-replace edits to the current working draft.set_draft— Replace the entire working draft of the current chapter.set_story_energy— Set or clear the book-wide tone and intensity direction used by later drafts.accept_chapter— Accept the current chapter or replace an earlier accepted chapter with corrected text.complete_book— Finish and lock a book that has reached its word goal.extend_book— Raise a book’s word goal so writing can continue.
6 free idea tools
outline_generator— Turn a premise into a chapter-by-chapter outline.character_builder— Build a character profile with motivation, flaw, voice, and defining detail.title_generator— Generate marketable title options from a premise and genre.pitch_generator— Create a logline and a compact back-cover blurb.first_paragraph— Generate an opening-paragraph idea from a premise.plot_hole_finder— Identify logic gaps and suggest quick repairs from a supplied synopsis.
$17 / month
One plan for every assistant.
Steering Wheel Mode is $17/month after a 7-day free trial — up to 30 new books per billing period, across Claude, ChatGPT, and Cursor. Prefer to pay once? The classic BookWriter app finishes a whole book for a flat $9.99, first chapter free.
- Your words kept verbatim
- Works in every assistant
- Revoke anytime
- Cancel anytime
Your assistant can finish the whole book.
Connect BookWriter over MCP and write a real book by chatting. 7-day free trial, then $17/month for up to 30 books.