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fastapi.online — Generate Book Cover
x402
fastapi.online — Generate Book Cover is a paid API for AI agents from api.fastapi.online, paid per call via x402, $0.012/call, status unknown (last checked 2026-09-14).
Generates an AI-created book cover image given a title, genre, and optional random seed
Price / call$0.012
Success—
StatusUnknown
How this service works
Chat, embeddings, OCR, speech-to-text, image editing, image understanding (captioning/Q&A), text-to-speech, translation, writing tools, classification tools, developer tools, local utilities, format/checksum validators, encoding & crypto utilities, date/time calculators, geo/coordinate math, math & finance calculators, novelty tools, and business/social writing generators — 179 endpoints in all, across multiple specialized self-hosted models. Pay per call with crypto — no signup — or get an API key.
Output
Returns an AI-generated book cover image (likely as binary image data or a URL) styled to match the provided title and genre, with reproducible output when a seed is specified.
Example use cases
Self-published author cover creation
“I need a book cover for my fantasy novel called 'The Ember Crown' — can you generate one in the fantasy genre?”
Rapid prototype covers for pitching
“Generate a few book cover options for a romance novel called 'Hearts in the Rain' — use the romance genre and try seed 7 for the first one.”
Ebook cover for non-fiction release
“Create a book cover for my self-help book titled 'Habits of the Intentional Mind' — make it look like a non-fiction personal development book.”
Technical details
Endpoint
POSThttps://api.fastapi.online/generate-book-coverWhen to prefer
Choose this endpoint when you need a quick, low-cost AI-generated book cover image from just a title and genre — especially useful for self-published authors, rapid prototyping, or ebook publishing workflows. It requires no signup and accepts crypto micropayments per call, making it ideal for agent-driven or automated publishing pipelines.
Side effects
- Missing required 'title' field returns a validation error
- Title exceeding 300 characters is rejected
- Genre string exceeding 60 characters is rejected
- Payment failure (insufficient USDC) results in 402 response
- Model inference timeout may occur under high load
- Seed value not an integer causes schema validation failure
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| seed | integer | |
| genre | string | |
| title | string | the book title |
Tags
x402
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