Write a book with Claude

Write an entire book by chatting with Claude — to the last page.

Name: BookWriter
Brand: BookWriter
Price: 19.99 USD
Availability: InStock

Claude’s prose is gorgeous and its memory of a long manuscript is not. Add BookWriter as a custom connector and Claude finishes real books — outline, continuity, and a true ending — with every word you write kept verbatim.

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7-day free trial · $17/month for up to 30 books · your words kept verbatim.

Why Claude stalls

Claude writes the most beautiful chapter one you’ll ever abandon

Great prose, no persistence. The book outruns the context window.

Claude is arguably the best pure prose writer of the current models — line for line, its chapters can be stunning. But a book is a feat of memory, and a chat has none that lasts. Around chapter three the manuscript overruns the context window and Claude starts reconstructing your story from fragments. The clue you planted in chapter two never pays off, because Claude no longer knows it exists.

You end up as the continuity department: re-pasting summaries, correcting names, reminding it what the book is about. The prose is lovely and the book never finishes.

MCP closes the gap. As a custom connector, BookWriter gives Claude durable, server-side project memory and a writing loop — so Claude’s gorgeous sentences finally add up to a finished book.

How to connect BookWriter to Claude

Your BookWriter MCP server URL

https://www.bookwriter.vip/api/mcp/v1

Public HTTPS endpoint. Your assistant signs you in over OAuth with your BookWriter account, so there’s no token to paste.

Connect Claude

1In Claude, open Customize → Connectors and click + Add custom connector.
2Name it BookWriter and paste the Server URL: https://www.bookwriter.vip/api/mcp/v1
3Click Connect → Approve. Claude authorizes over OAuth — there is no token to paste.
4Start a chat and say “Start a new book” to begin.

Connect Claude Claude custom connectors guide

The write-a-book loop

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.
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.
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.
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.

How each one writes a book

Same goal, two completely different machines. Here is the actual path from idea to finished pages on each side.

How BookWriter writes a book

1
Create the book in chat
One sentence sets up a real project — title, length, chapter plan — held on the server.
2
Seed each chapter
You write the opening lines; they are kept verbatim as the chapter’s DNA.
3
Hand off and it finishes
The engine drafts the rest in your voice, checking continuity against the whole book.
4
Sharpen and accept
Nudge the prose, accept the chapter, and it advances — no copy-paste, no lost thread.
5
Resume anytime
catch_me_up recaps threads and characters so chapter 30 matches chapter 1.

How Claude alone writes a book

1
Prompt a stunning chapter one
Claude writes beautifully — you’re hooked.
2
Prompt chapter two
You paste a summary back in so Claude “remembers” the book.
3
Manage the context window
By chapter three the manuscript overruns memory and details slip.
4
Re-summarize, re-paste, repeat
You babysit continuity instead of writing the story.
5
Abandon a gorgeous fragment
Lovely prose, unfinished book — the usual ending.

The setup

Add BookWriter as a custom connector — one URL, no token

Customize → Connectors → add the server URL → approve. Done.

Claude supports remote MCP servers as custom connectors. You open Customize → Connectors, add a custom connector, name it BookWriter, and paste the server URL. Claude connects from Anthropic’s cloud and signs you in over OAuth, so the URL must be the public https endpoint (not localhost) and there’s nothing to copy-paste but the address.

Once connected, BookWriter’s tools are available in any chat. You never call them by hand — you just say what you want (“start a new book,” “hand off this paragraph”) and Claude runs the right tool.

Prefer a guided path? Open your BookWriter connection page and follow the Claude flow, which walks the same steps with your account already signed in.

The method

Steer with your own words; let Claude finish in your voice

Your seed sentences are kept verbatim — the engine builds around them.

The loop is the same one that works in every MCP client. Open a chapter with a seed paragraph in your voice. handoff sends it to BookWriter’s engine, which finishes the chapter around your words and checks it against the whole book. sharpen tunes the added prose lighter or stronger; accept_chapter locks it and advances you.

Because your sentences seed every chapter and are never overwritten, the finished book reads like you — with Claude and the engine handling continuity, pacing, and the relentless middle that stalls most drafts.

Come back a week later and “catch me up on this book” recaps your threads and cast so you can keep writing without re-reading everything.

The tools Claude gets

Nine writing tools run the book, plus six free idea tools for when you’re still brainstorming. You never call them by hand — you just talk, and your assistant runs the right one.

9 core writing tools

create_book — Start a real project with a title, target length, and chapter plan.
list_books — See every book on your account so you can pick one to keep writing.
get_book_status — Check progress — which chapters are drafted, sharpened, or accepted.
handoff — Send your seed paragraph; the engine finishes the chapter around your words.
retry_handoff — Re-run the draft if you want a fresh take on the same chapter.
sharpen — Refine the current chapter lighter or stronger, keeping your lines intact.
accept_chapter — Approve a chapter so it counts toward your finished book, then advance.
catch_me_up — Get a recap of where you left off — threads, characters, recent chapters.
get_credit_status — See how many books you have left in this billing period.

6 free idea tools

outline_generator — Turn a premise into a chapter-by-chapter outline.
character_builder — Flesh out a character with backstory, voice, and motivation.
title_generator — Brainstorm title options that fit your premise and genre.
pitch_generator — Draft a one-line hook or a back-cover blurb.
first_paragraph — Get opening-paragraph ideas to spark your seed.
plot_hole_finder — Surface gaps and inconsistencies in your story so far.

What you can say

Plain language is all it takes. Type these the way you’d say them out loud.

“Start a new book — a literary family drama, about 80,000 words.”
“Here’s my opening paragraph for chapter 1 — hand it off.”
“Sharpen this chapter a little — keep my sentences, just smooth the rhythm.”
“Accept this chapter and set up the next one.”
“Catch me up on where I left off in this book.”
“Find any plot holes in what we have so far.”

$17 / month

One plan. Every assistant. Up to 30 books a month.

Steering Wheel Mode is $17/month after a 7-day free trial — the writing engine plus the connector for Claude, ChatGPT, and Cursor, with no per-app fees. Six idea tools are free on any account. Prefer to pay once instead of subscribing? The classic BookWriter app finishes a whole book for a flat $19.99, first chapter free.

Up to 30 books / month
Works in every assistant
Your voice, your words
Cancel anytime

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Your words stay verbatim

The engine writes around your sentences — it never overwrites what you typed.

Revoke anytime

Every connection is yours to control. Disconnect any assistant from your account in one click.

One plan, every app

The same subscription connects Claude, ChatGPT, and Cursor — no per-app fees.

Questions writers actually ask

Can Claude write a whole book?

Claude writes exceptional prose but can’t finish a book on its own — a chat has no durable memory, so a long manuscript overruns the context window and continuity breaks. Connect BookWriter as a Claude custom connector over MCP and Claude can finish the whole thing: it calls tools backed by a server-side book bible that holds your characters, plot, and continuity to the last page.

How do I connect BookWriter to Claude?

In Claude, open Customize → Connectors, add a custom connector named BookWriter, and paste BookWriter’s server URL. Approve over OAuth — you sign in with your BookWriter account and there’s no token to paste. Then say “start a new book” in any chat. The connection works in Claude Desktop and on the web.

Does Claude overwrite my writing?

No. You seed each chapter with your own sentences and they’re preserved verbatim. BookWriter’s handoff and sharpen only add and refine the surrounding prose, so your words remain the spine of every scene.

What does it cost to write a book with Claude this way?

BookWriter’s writing tools run on Steering Wheel Mode: a 7-day free trial, then $17/month for up to 30 books per billing period across Claude, ChatGPT, and Cursor. Six idea tools are free on any account. You provide your own Claude access.

Do I own the book Claude helps me write?

Yes — every word is yours to publish, sell, and keep. You disclose AI involvement to your publishing platform (such as Amazon KDP) when you publish, the same as with any AI tool.

Keep exploring

Write a book with MCP (overview)Write a book in ChatGPT Write a book in Cursor AI Book Writer — the AI that finishes

Stop collecting chapters. Finish the book in Claude.

Connect BookWriter, seed your first chapter, and watch it finish in your voice. 7-day free trial, then $17/month for up to 30 books across every assistant.

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