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fastapi.online — Generate Coloring Page
x402
fastapi.online — Generate Coloring Page is a paid API for AI agents from api.fastapi.online, paid per call via x402, $0.012/call, status down (last checked 2026-09-15).
Generates a black-and-white coloring page image from a text subject description using self-hosted AI inference
Price / call$0.012
Success—
StatusDown
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
An AI-generated black-and-white line art coloring page image based on the provided subject description. The seed parameter allows reproducible results when the same seed and subject are reused.
Example use cases
Kids' birthday party coloring sheets
“Make a coloring page of a birthday cake with candles and balloons for my daughter's party — use seed 7 so I can print the same one again.”
Classroom educational activity
“Generate a coloring page of the solar system with all eight planets for a 3rd grade science class activity.”
Custom coloring book for a pet
“Create a coloring page of a golden retriever playing fetch in a park — use seed 123 so it's reproducible.”
Technical details
Endpoint
POSThttps://api.fastapi.online/generate-coloring-pageWhen to prefer
Choose this endpoint when you need a quick, cheap ($0.012 USDC), no-signup coloring page image generated from a text description — especially useful for one-off or programmatic coloring book generation. Prefer it over general image generation APIs when you specifically want clean black-and-white line art suitable for printing and coloring.
Side effects
- Subject too short or empty (minLength:1 enforced)
- Subject exceeds 300 characters (maxLength enforced)
- Invalid seed type (must be integer)
- Service temporarily unavailable or model error returning 5xx
- Payment failure or insufficient USDC balance via x402 protocol
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| seed | integer | |
| subject | string | the coloring page subject |
Tags
x402
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