# Incoming Webhook

**URL:** <https://devforum.zoom.us/t/incoming-webhook/6477>\
**Category:** App Marketplace\
**Created:** [October 31, 2019, 10:52am UTC](https://devforum.zoom.us/t/incoming-webhook/6477 "2019-10-31T10:52:52Z")\
**Posts on this page:** 1\
**Showing post:** 19

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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:** [December 26, 2019, 4:41pm UTC](https://devforum.zoom.us/t/incoming-webhook/6477/19 "2019-12-26T16:41:00Z")

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Hey @alon,

You can see my update here on the bug fix:

> [@Known Zoom API issues](https://devforum.zoom.us/t/known-zoom-api-issues/7207):
>
> If you are experiencing an “Invalid Token” error, there is a possibility it is a bug on Zoom’s end. Below are details of the bug, a work around, and when we are releasing a fix: Conditions: This problem can arise when a token is granted and then immediately used to call a Zoom API endpoint. The server that issues the new token sets the nbf (not valid before) time to be the time “exactly now.” But not all servers at Zoom have synchronized clocks. If the token is immediately used for an API e…

Thanks,  
Tommy

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