The HTTP Cross-Origin-Resource-Policy (CORP) indicates that the browser should block no-cors cross-origin or cross-site requests to the given resource.

It specifies resource owner’s policy for what sites/origins should be allowed to load this resource.

Syntax

Cross-Origin-Resource-Policy: same-site | same-origin | cross-origin

Directives

• same-site

  • : Resources can only be loaded from the same site.

  same-origin

  • : Resources can only be loaded from the same origin.

  cross-origin

  • : Resources can be loaded by any other origin/website.

Examples

For more examples, see https://resourcepolicy.fyi/.

Disallowing cross-origin no-cors requests

The Cross-Origin-Resource-Policy header below will cause compatible user agents to disallow cross-origin no-cors requests:

Cross-Origin-Resource-Policy: same-origin

Specifications

Browser compatibility

See also

• Cross-Origin Resource Policy (CORP) explainer

• Consider deploying Cross-Origin Resource Policy