# Why can't I call the Cloud Recording RESTful API through a web browser? (/en/api-reference/faq/product/call_api_in_browser)

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

A Web API needs to make a cross-origin request in accordance with Cross-Origin Resource Sharing (CORS) to call the Cloud Recording RESTful API. The browser must first send an OPTIONS request to the server to query if the server accepts cross-origin requests before sending a cross-origin POST request. However, the Cloud Recording RESTful API does not support the OPTIONS method, and therefore you cannot call it with a Web API.