CDN reference

Base URL: https://cdn.onlyfonts.ai

The CDN serves CSS and woff2 files from Cloudflare’s global edge. All responses send Access-Control-Allow-Origin: *. No cookies, no tracking.

css2 — Google Fonts-compatible

GET /css2?family={Family}:{axes}@{tuples}&display=swap

Same format as fonts.googleapis.com/css2. Examples:

/css2?family=Inter                              default weight 400
/css2?family=Inter:wght@400;700                 specific weights
/css2?family=Inter:wght@300..800                variable weight range
/css2?family=Inter:ital,wght@0,400;1,400        italic combos
/css2?family=Inter:wght@400&family=Space+Mono   multiple families

display accepts auto, block, swap (default), fallback, optional.

css — native endpoint

GET /css?family={slug}&w=400,700&display=swap

Uses the catalog slug instead of the display name, and a simple comma-separated weight list. Omit w for all available weights.

font files

GET /{slug}/{file}.woff2

Direct woff2 files, named {variant}.{subset}.woff2 (for example /inter/regular.latin.woff2). You normally don’t construct these by hand — the CSS endpoints reference them — but they’re stable URLs if you want to mirror or self-host.

caching

response	cache
CSS (`/css`, `/css2`)	public, 1 hour
woff2 files	public, 1 year, immutable

Font files are content-stable: a given file URL always serves the same bytes, which is why they’re safe to cache immutably.

custom domains

Verified custom domains (see custom domains) serve the same endpoints on your hostname, scoped to the fonts attached to your account.