Network · CORS

Test if a URL accepts your origin

Send a preflight from your browser and read back the access-control headers the target returns.

Runs locallyYour network only

Origin URL

Target API URL

About CORS

CORS (Cross-Origin Resource Sharing) is a security mechanism that allows web pages to make requests to a different domain than the one serving the web page. The server must explicitly allow cross-origin requests by including appropriate CORS headers.