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fastapi.online — AI Poster Generator
x402
fastapi.online — AI Poster Generator 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 themed poster image using a self-hosted AI model, with optional random 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 a generated poster image (likely as binary image data or a URL) matching the requested theme, optionally reproducible via the provided seed value.
Example use cases
Event promotional poster creation
“Make me a poster with a 'jazz night under the stars' theme for my venue — use seed 7 so I can regenerate it if needed.”
Thematic art poster for blog
“Generate a poster with a 'ancient mythology and epic battles' theme — I want to use it as a hero image for my history blog post.”
Branded novelty poster gift
“Create a poster with a 'retro 1950s diner and classic cars' theme, use seed 123 so the result is reproducible when I order prints.”
Technical details
Endpoint
POSThttps://api.fastapi.online/generate-posterWhen to prefer
Choose this endpoint when you need a quick, pay-per-call AI-generated poster image without signup, particularly when reproducibility via seed is important or when integrating crypto micropayments (x402) into an automated pipeline.
Side effects
- Missing or empty theme string returns a validation error
- Theme string exceeding 300 characters is rejected
- Invalid seed type (non-integer) causes a schema validation failure
- Payment not included or insufficient USDC amount results in HTTP 402
- Model inference timeout may return a 5xx server error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| seed | integer | |
| theme | string | the poster theme |
Tags
x402
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