AuthorKit
AuthorKit Cloud · bring your own AI

Write books with the Claude, ChatGPT or Grok you already pay for.

Sign in with your plan once. It becomes the brain behind the coauthor, while AuthorKit keeps the chapters, the story bible, Accept and the file.

How it works

Connect once. Ask. Accept.

1Connect
Settings → Models. Sign in with ChatGPT, Claude or Grok. No API key to paste.
ClaudeClaudeSign inChatGPTChatGPTSign inGrokGrokSign in
2Ask
Talk to Book Author the way you talk to your AI. It writes into the manuscript, not a chat log.

Draft chapter four. Keep Mira quiet, and check the bible for the ring.

  • manuscript opened
  • bible read
  • chapter 4 drafted
  • waiting for Accept
3Accept
Chapters land as suggestions. Keep what works; the bible, outline and export are right there.

She almost turned. She looked back at the clock. Rain hit the tracks. She walked.

AcceptRejectTalk

The bill

A second AI subscription vs. AuthorKit Cloud

Most writing tools sell their own AI credits on top of the plan you already have. If you pay for Claude, ChatGPT or Grok, a second AI bill makes no sense.

Writing with a second AI

  • Your Claude / ChatGPT planwhat you pay now
  • An AI writing toola second plan
  • “write chapter three”credits
  • “fix the middle”credits
  • “put it back how it was”credits

or the DIY route

  • Docs + a chat windowcopy, paste, repeat
  • story bibleanother tab
  • continuity noteslost in chat
  • ebook exportyour weekend
Total

two bills, or a weekend of pasting

your words charged twice

With AuthorKit Cloud

  • Your Claude / ChatGPT / Grok planwhat you pay now
  • AuthorKit editor$0
  • messages on your plannot charged to the wallet
  • story bible + mapincluded
  • seven edit passesincluded
  • propose-only Acceptincluded
  • EPUB / HTML / Markdownincluded
  • hosted modelswallet, if you want them
  • second AI billnone
Total

the plan you already pay for

the book tools come with the desk

What you get

What the desk adds to your AI

Everything a chat window can't hold, from the moment you connect.

A manuscript, not a paste war
Your AI's words go into chapters on the real editor, with the binder, bible and Accept, instead of a chat log you copy into Docs.
The craft tools come included
Story bible, map, seven edit passes, format and publish checks. Not a plugin you buy after the draft.
Bring it from outside, too
Mint an MCP connector key for Book Author in Vault and call the desk from Cursor, ChatGPT or any MCP client.
Your book stays yours
The manuscript lives on your desk. Export EPUB, HTML or Markdown any time. Your pages are not used to train models.

Bring the AI you already pay for.

Connect once in Settings → Models. Your plan writes; AuthorKit keeps the book.

FAQ

Bring your own AI, answered.

Connect once. Your plan writes; the desk keeps the book.

01What is AuthorKit Cloud?

Book Author running on the AI plan you already have. Sign in with ChatGPT, Claude or Grok and the coauthor uses that plan; drafts land as propose-only suggestions on the AuthorKit desk.

02Do I need an API key?

No. You sign in with your plan in Settings → Models. API keys are there for power users who want them.

03Will my AI overwrite the book?

No. Every change is a suggestion on the exact words it touches. You Accept, Reject, or keep talking.

04What if I don't pay for an AI plan?

Use our hosted models. They run from the wallet, on the same desk.

05Can I use it from Cursor or another MCP client?

Yes. Mint an MCP connector key for Book Author in Vault and point your client at it.

06Where is my manuscript stored?

On your AuthorKit desk. Export EPUB, HTML or Markdown whenever you want. Your pages are not used to train models.