For Amazon KDP authors
Write the manuscript for your next KDP book with AI
FictionAI plans your book (story bible and chapter outline), writes it chapter by chapter with you, and exports a DOCX you can format in Atticus or Vellum or upload to KDP yourself.
3 books free, no credit card. AI use is billed by OpenRouter to your own account.
What FictionAI does for a KDP author
Plans the book
From a genre and a one- or two-sentence pitch, one action builds premise, title, world, cast and a chapter-by-chapter outline. Edit all of it.
Writes chapter by chapter
Each chapter is written from the story bible and the chapters before it. Continue, rewrite a passage or revise, then edit by hand.
Reviews the draft
Editorial review and final review give book-wide feedback with suggested revisions.
Exports your manuscript
DOCX (headings and page breaks that Atticus and Vellum import), PDF, Markdown, plain text or HTML.
Shows what the AI costs
You connect your own OpenRouter account and pay it per use. Every generate button shows an estimate first and the actual cost after.
Series
On Pro ($9.99/month), plan a series with a shared world and cast; each book is built with them as context.
What it does not do
FictionAI does not format books to KDP specifications, create EPUB or KPF files, design print interiors or upload anything to Amazon. Amazon KDP accepts DOCX uploads, and tools such as Kindle Create, Atticus or Vellum handle formatting.
- Amazon asks you to disclose AI-generated content when you publish; check KDP's current content guidelines.
- Read and edit every chapter before you publish. You are the author of record.
What it costs
A flat platform plan, plus AI use billed by OpenRouter to your own account.
| Plan detail | Free | Pro |
|---|---|---|
| Price | $0 | $9.99/month |
| Books | Up to 3 | Unlimited |
| Series | None | Unlimited |
| Adult content | No | Yes |
| AI usage | You pay OpenRouter; no FictionAI markup | You pay OpenRouter; no FictionAI markup |
How it works
- 01
Set up your book
Pick a genre, write your pitch and choose a length. Fine-tune point of view, tone and story shape if you want.
- 02
Build the story bible
One click drafts premise, title, world, cast and outline. Edit anything inline.
- 03
Write and revise
Write chapters one at a time or queue the rest, then edit in the workspace and run an editorial review.
- 04
Export and publish
Download DOCX, format it in your tool of choice and upload it to KDP yourself.
Questions
Can I publish AI-written books on Amazon KDP?
Amazon KDP accepts AI-generated content but asks you to disclose it when you publish. Check KDP's current content guidelines. FictionAI produces the manuscript; formatting and upload happen in KDP or a formatting tool.
How fast can I write a book with FictionAI?
It depends on the length, the model and how much you edit. The story bible is one action and chapters generate one at a time (you can queue the rest). Plan on reading and revising every chapter.
What export formats does FictionAI support?
DOCX, PDF, Markdown, plain text and HTML. There is no EPUB export; KDP accepts DOCX, and Atticus or Vellum can import the DOCX to produce ebook and print files.
How much does FictionAI cost compared to Sudowrite?
FictionAI is free for 3 books, or $9.99/month for Pro, and you pay OpenRouter directly for AI use at its prices. Sudowrite sells subscriptions with a monthly credit allowance; see their pricing page for current prices.
Can I write a series of KDP books?
Yes, on Pro. Series can be sequential (one connected story), standalone (same universe) or mixed, with a series outline, cast and world shared by the books.
Start your next KDP manuscript
Build a story bible from a two-sentence pitch and write chapter one today.