JSON APIs for web apps
Return optimized product, gallery, avatar, listing, or preview URLs to React, Vue, mobile, or admin clients.
fastapi image optimization
Use Skymage for image-heavy FastAPI apps without adding image workers
Keep uploaded files, static assets, generated previews, and object-storage media where your FastAPI app already exposes them. Return Skymage URLs from API responses for exact dimensions, crops, WebP or AVIF output, and cached delivery.
from urllib.parse import urlencode
def skymage(src: str, **params: object) -> str:
return f"https://demo.skymage.net/v1/{src}?{urlencode(params)}"
@app.get("/products/{slug}")
async def product(slug: str):
product = await product_repo.find_by_slug(slug)
return {
"name": product.name,
"hero_url": skymage(product.hero_path, w=1280, f="avif", q=84),
}
where it fits
Start with the API response that already repeats image URLs
A useful FastAPI image optimization test starts with one public endpoint, one uploaded or storage-backed image path, and a repeated response surface where right-sized variants are easy to compare.
Uploads and object storage
Transform public S3, R2, static, or app-served uploads without queueing new derived files.
Generated previews
Normalize screenshots, report thumbnails, document previews, and workspace media into predictable sizes.
endpoint rollout
Put image URL generation behind one response helper first
Use one Python helper near your serializers or response builders, then test a single listing, detail, or upload endpoint before changing broader media handling.
def card_image(path: str) -> str:
return skymage(
path,
w=520,
h=390,
fit="cover",
f="webp",
q=82,
)
return {"items": [{"image_url": card_image(item.image_path)} for item in items]}
evaluation path
A practical FastAPI image CDN test answers four questions
Origin fit
Can Skymage transform the public upload, static, or storage URLs your FastAPI app already returns?
Response sizes
Can repeated API responses request exact dimensions instead of pushing originals into every client?
Format output
Can endpoints ship WebP or AVIF without adding Pillow jobs, queues, or derived-file storage?
Rollout risk
Can one endpoint prove bytes, cache, and visual fit before a broader media pipeline change?
free check
Get a FastAPI image endpoint audit
Send one public FastAPI-backed page or endpoint. Skymage will identify the repeated image response to test first, the URL parameters to try, and whether the current upload or static media origin fits a low-risk rollout.