# Signature invalid

**URL:** <https://devforum.zoom.us/t/signature-invalid/91687>\
**Category:** Web\
**Created:** [July 12, 2023, 1:42pm UTC](https://devforum.zoom.us/t/signature-invalid/91687 "2023-07-12T13:42:36Z")\
**Posts on this page:** 1\
**Showing post:** 13

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**Author:** ![gianni.zoom](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/gianni.zoom/32/32523_2.png) [@gianni.zoom](https://devforum.zoom.us/u/gianni.zoom)\
**Post date:** [July 19, 2023, 7:57pm UTC](https://devforum.zoom.us/t/signature-invalid/91687/13 "2023-07-19T19:57:44Z")

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Hi @c.egeolu ,

You need the JWT to generate the signature, but please see the attached code sample on our postman workspace:

[https://www.postman.com/zoom-developer/workspace/zoom-public-workspace/request/22097587-177f9fb7-6824-41fa-8de6-3b1971ca70fc](https://www.postman.com/zoom-developer/workspace/zoom-public-workspace/request/22097587-177f9fb7-6824-41fa-8de6-3b1971ca70fc)

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