Bring your own API key
Any model on your own key, 1 credit an action
Connect one OpenRouter key. Chapters, outlines, covers and images run on it, and OpenRouter bills you for the model.
- 100+ text models for chapters
- 1 credit per action on your key
- ElevenLabs key for audiobooks
See it in action
Write long books at model cost
Without it
- Locked to the models a tool picked
- Full credit price for every rewrite
- A blank API playground with no book around it
With it
- Pick any OpenRouter model per chapter
- 1 credit per action on your key
- The whole book workflow on your own budget
Connect a key in three steps
01Step
Create an OpenRouter key
Sign up, add credit, turn on Auto Top Up, create a key.
02Step
Paste it in Settings
We check it right away and show what it covers: text, reasoning models and images.
03Step
Add ElevenLabs for audio
Optional. Your audiobooks are narrated on your own key.
What runs on your key
Chapters
Pick any of the 100+ text models on OpenRouter.
Outlines and rewrites
Planning and AI edits run on the same key.
Covers and images
Covers, chapter and visual book images at 1 credit each.
Audiobooks
Narration on your ElevenLabs key with Text to Speech access.
Clear failures
A rejected or empty key stops with an error. No credits charged.
Remove any time
Delete the key and you are back on credits instantly.
Available on Ultra and AppSumo Tier 3 and Tier 4.
Compare plansQuestions authors ask
Yes, far fewer. Each action on your key costs 1 credit. An action with a step that must run on our keys is charged at the normal price, and a 0 balance blocks actions.
For chapters, any of the 100+ text models on OpenRouter, including Claude, GPT, Gemini, Llama, Mistral and DeepSeek.
The action stops with an error instead of running on our keys, and no credits are charged. Top up, or remove the key to go back to credits.
Connect one OpenRouter key. It reaches OpenAI, Anthropic, Google and the other providers through one account and one bill.
Ultra and AppSumo Tier 3 and Tier 4.
Pairs well with
Start on credits, bring your key later
Write your first chapters free, then connect your key when you want any model.