# Why can't I call the Cloud Recording RESTful API from a browser? (/en/api-reference/faq/integration/call\_browser)

> For AI agents: see the complete documentation index at [llms.txt](/llms.txt).

To call the Cloud Recording RESTful API from a web page, the browser must send a cross-origin request. Under the CORS specification, the browser first sends an `OPTIONS` request to check whether the server allows cross-origin requests, and only then sends the actual `POST` request. The Cloud Recording RESTful API does not support the `OPTIONS` method, so you cannot call it from a browser.

To use the Cloud Recording RESTful API, send the requests from your app server instead.