
Free auto-updating list of live-tested proxies (HTTP/HTTPS/SOCKS4/SOCKS5), refreshed every 6 h.
ProxyForge API is a free Development API that requires no API key, is served over HTTPS and supports CORS, so it can be called from the browser.
Scrape, test live, and export working proxies on your machine, your IP. Curated pool refreshes every 6h. Free demo, no signup.
Details from proxyforge.dev.

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The ProxyForge API is provided by ProxyForge (proxyforge.dev). Scrape, test live, and export working proxies on your machine, your IP. Curated pool refreshes every 6h. Free demo, no signup.
Yes. The ProxyForge API is listed in the Development 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 ProxyForge API requires no authentication, so you can start making requests without signing up.
Yes. The ProxyForge API supports CORS, so front-end JavaScript can call it directly.
Yes. The ProxyForge API is served over HTTPS, so it's safe to use in production.