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fastapi.online Image Resize
x402
fastapi.online Image Resize is a paid API for AI agents from api.fastapi.online, paid per call via x402, $0.001/call, status down (last checked 2026-09-15).
Resizes an uploaded image (PNG/JPEG/WebP) to specified dimensions, optionally maintaining aspect ratio, for $0.001 USDC per call
Price / call$0.001
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
Returns the resized image as binary data in the same or compatible format (PNG/JPEG/WebP), scaled to the requested width and height, optionally with aspect ratio preserved.
Example use cases
E-commerce thumbnail preparation
“I need to resize this product image to 300x300 pixels for my online store listing — it's a PNG, and please maintain the aspect ratio so it doesn't look stretched.”
Web banner image scaling
“Can you shrink this JPEG banner image down to 1200 pixels wide by 400 pixels tall for our website header?”
Profile picture standardization
“Resize this WebP photo to 150x150 pixels for a user avatar — exact square dimensions, no need to maintain aspect ratio.”
Technical details
Endpoint
POSThttps://api.fastapi.online/image-resizeWhen to prefer
Choose this endpoint when you need a simple, pay-per-call image resize without signup or subscription, especially in agentic workflows where crypto micropayments (USDC) are already available. Prefer this over cloud image CDNs when no account management is desired and the volume is low enough for per-call pricing to be economical.
Side effects
- Unsupported file format (non-PNG/JPEG/WebP input) returns an error
- Missing width or height parameter causes a bad request error
- Payment failure via x402 protocol returns a 402 response requiring crypto payment
- Image file too large may cause a timeout or rejection
- Invalid or non-numeric width/height values return a validation error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| file | string | Image file (PNG/JPEG/WebP) |
| width | string | |
| height | string | |
| maintain_aspect | string |
Tags
x402
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