# OAuth access\_token signature verification

**URL:** <https://devforum.zoom.us/t/oauth-access-token-signature-verification/7899>\
**Category:** API and Webhooks\
**Created:** [February 5, 2020, 4:10pm UTC](https://devforum.zoom.us/t/oauth-access-token-signature-verification/7899 "2020-02-05T16:10:34Z")\
**Posts on this page:** 1\
**Showing post:** 4

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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:** [February 5, 2020, 6:01pm UTC](https://devforum.zoom.us/t/oauth-access-token-signature-verification/7899/4 "2020-02-05T18:01:46Z")

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Hey @vatuska,

Have you tried [JWT Decoding](https://jwt.io/) the access\_token to get the signature?

Here is a related post:

> [@Jwt Token Validation](https://devforum.zoom.us/t/jwt-token-validation/6765):
>
> Description/Error refresh\_token and acceess\_token obtained from [https://oauth.zoom.us](https://oauth.zoom.us) upon successful OAuth flow contain signature that I am unable to validate. Please advise what secret I shall use to validate incoming tokens? Thank you

Thanks,  
Tommy

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