CORS error when calling API

[Harish_Gupta6]

Hi,

I am trying to call Marketo rest API using the javascript on the CMS web page but I am getting CORS error. Is there any way to fix this?

Thanks

Harish G

[SanfordWhiteman]

You must never, ever, ever even consider calling the REST API directly from the browser. Just think about what you're exposing for a second.

[Harish_Gupta6]

Hi Sanford,

Yes, agreed with you. Calling the rest API from the browser is not a safe way. But I am doing it for testing purpose.

From Server, I am able to call the API successfully but I was testing using browser-side also.

Thanks

[SanfordWhiteman · Accepted solution]

There's no reason to use the browser to test, since the browser won't be the deployment platform. Use cURL, Postman, etc.

The reason for the CORS error should be self-evident: it isn't a browser API, so the Access-Control headers are not present.