CORS Anywhere – a reverse proxy that adds CORS headers.

Usage:

  /                      Show this help text
  /iscorsneeded          Returns "no" (useful for feature-detection)
  /<url>                 Proxy <url> with CORS headers in the response

If the protocol is omitted it defaults to http (https when port is 443).
Cookies are stripped from every proxied response.
Redirects (301/302/303) are followed automatically up to 5 times.

Source: https://github.com/Rob--W/cors-anywhere