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fastapi.online — Image Collage Generator
x402
fastapi.online — Image Collage Generator is a paid API for AI agents from api.fastapi.online, paid per call via x402, $0.0015/call, status unknown (last checked 2026-09-15).
Combines 2 or more uploaded images into a single collage with configurable column count and tile size
Price / call$0.0015
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
A single composed image file containing all input images arranged in a grid layout according to the specified column count and tile size.
Example use cases
Product photo grid for listing
“I have 6 product shots I want to combine into a 3-column grid collage — can you stitch them together with a tile size of 400?”
Before-and-after comparison layout
“Take these 2 images and combine them side by side into a single collage with 2 columns so I can compare them easily.”
Social media mood board
“I've got 9 photos I want to arrange into a 3-column collage for an Instagram post — please combine them with a tile size of 250.”
Technical details
Endpoint
POSThttps://api.fastapi.online/image-collageWhen to prefer
Choose this endpoint when you need a straightforward, pay-per-call image collage assembled server-side without signup. Ideal for agents that need to combine a small set of images into a grid on the fly, especially when crypto micropayment (x402/USDC) is already part of the workflow.
Side effects
- Fewer than 2 images provided — requires at least 2 files
- Unsupported image format or corrupt binary data — processing error returned
- Invalid or non-numeric columns/tile_size values — parameter error
- Payment not included or insufficient — 402 Payment Required
- Images too large or too many files — potential timeout or memory error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| files | array | 2 or more image files |
| columns | string | |
| tile_size | string |
Tags
x402
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