Search and fetch SVG icons from 200+ open source icon sets.
Iconify API is a free Art & Design API that requires no API key, is served over HTTPS and supports CORS, so it can be called from the browser.
All popular icon sets, one framework
Details from iconify.design.

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Icons (find "search icon" hyperlink in page)
The Iconify API is provided by Iconify API (iconify.design). All popular icon sets, one framework
Yes. The Iconify API is listed in the Art & Design category of the public-apis directory, which only includes APIs that are free or have a free tier. Check its documentation for rate limits and paid plans.
No. The Iconify API requires no authentication, so you can start making requests without signing up.
Yes. The Iconify API supports CORS, so front-end JavaScript can call it directly.
Yes. The Iconify API is served over HTTPS, so it's safe to use in production.