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fastapi.online — Generate Avatar
x402
fastapi.online — Generate Avatar is a paid API for AI agents from api.fastapi.online, paid per call via x402, $0.012/call, status unknown (last checked 2026-09-15).
Generates a unique avatar image from a text description of a person or character, with an optional seed for reproducibility.
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 avatar image (likely as binary image data or a URL) representing the described person or character, generated by a self-hosted AI image model. If a seed is provided, the same seed and description will reproduce the same avatar.
Example use cases
Profile picture for new user account
“Create an avatar of a friendly young woman with curly brown hair and glasses for a new user's profile picture, use seed 7 so we can regenerate it if needed.”
Game character portrait generator
“Generate an avatar of a fierce orc warrior with green skin, tusks, and battle scars — use seed 1337 so the image stays consistent across sessions.”
AI chatbot persona avatar
“Make an avatar of a cheerful robot with blue eyes and a silver body for my customer support chatbot persona, seed 100.”
Technical details
Endpoint
POSThttps://api.fastapi.online/generate-avatarWhen to prefer
Choose this endpoint when you need a fast, cheap ($0.012 USDC), pay-per-call avatar image generated from a text description with no signup required. It is ideal when reproducibility via seed is important, or when you want a self-hosted model rather than a cloud provider. Best for agents that need on-demand avatar generation as part of a workflow without managing API keys or subscriptions.
Side effects
- Description too short (minLength 1) or too long (maxLength 300) — validation error returned
- Invalid seed type (must be integer) — schema validation error
- Model inference failure or timeout — server error response
- Payment not completed or insufficient USDC — 402 Payment Required response
- Empty or missing description field — bad request error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| seed | integer | |
| description | string | the person/character |
Tags
x402
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