# Error 443 in curl when calling API

**URL:** <https://devforum.zoom.us/t/error-443-in-curl-when-calling-api/11021>\
**Category:** API and Webhooks\
**Created:** [April 3, 2020, 7:32pm UTC](https://devforum.zoom.us/t/error-443-in-curl-when-calling-api/11021 "2020-04-03T19:32:40Z")\
**Posts on this page:** 1\
**Showing post:** 6

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**Author:** ![tommy](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/tommy/32/72769_2.png) [@tommy](https://devforum.zoom.us/u/tommy)\
**Post date:** [April 3, 2020, 10:49pm UTC](https://devforum.zoom.us/t/error-443-in-curl-when-calling-api/11021/6 "2020-04-03T22:49:32Z")

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Thanks @marcelocuadrado,

Are you using [TLS 1.2](https://www.google.com/search?q=tls+1.2&oq=tls+1.2&aqs=chrome..69i57j0l5.2743j0j7&sourceid=chrome&ie=UTF-8) on your production server?

Thanks,  
Tommy

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