Cross-Origin Resource Sharing (CORS ) is an HTTP-header based mechanism that allows a server to indicate any origins (domain, scheme, or port) other than its own, from which a browser is to permit to load resources.
The same-origin security policy forbids cross-origin access to resources. But CORS gives web servers the ability to say they want to opt into allowing cross-origin access to their resources.
Unless specified otherwise, most API services support CORS. To define the origins that are acceptable, create an OAuth client that matches the origin PageSeeder is to accept.
For example, to support a cross-origin request from an app at
https://app.example.net , you need to register an OAuth client and set its URI as