> ## Knowledge Base Index
> Fetch the complete knowledge base index at: https://devmurf.crisp.help/sitemap.xml
> Use this file to discover available pages before exploring further.
> Pure-Markdown content can be obtained by appending a '.md' suffix to the content URLs listed in the sitemap (without the trailing slash).

# To avoid CORS blocking, whitelist the origin domain for production environments by providing a set of approved domains to Murf.

Articles on: [API](/en/category/api-szk3rj/)

  
  
Even if you've obtained an

` api-key`

, there can be instances where your requests are being blocked due to CORS. For development and testing,

` localhost:3000`

is whitelisted by default, requests can be sent from there. For production environments, make sure the origin domain is approved as a request origin by Murf. You can provide a set of domains and they will be approved for use by Murf.  
  
While it is possible to build workflows that access Murf API from the browser, we recommend the usage of server-side languages to integrate Murf API into your business logic.

Updated on: 16/05/2023