# Zoom response:  reason: "Invalid Token!" error: "invalid\_grant"

**URL:** <https://devforum.zoom.us/t/zoom-response-reason-invalid-token-error-invalid-grant/67120>\
**Category:** Authentication\
**Created:** [April 6, 2022, 6:14pm UTC](https://devforum.zoom.us/t/zoom-response-reason-invalid-token-error-invalid-grant/67120 "2022-04-06T18:14:27Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![arnaud.sintes](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/arnaud.sintes/32/36252_2.png) [@arnaud.sintes](https://devforum.zoom.us/u/arnaud.sintes)\
**Post date:** [April 6, 2022, 6:14pm UTC](https://devforum.zoom.us/t/zoom-response-reason-invalid-token-error-invalid-grant/67120/1 "2022-04-06T18:14:28Z")

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Hi,

I am using the OAuth2 authentication, and when handling the refresh token after each request, I sometimes get a 400 Bad Request Response with the following body :

reason: “Invalid Token!”  
error: “invalid\_grant”

I do not get this response for all clients, only for a specific client.  
Could it be a scope issue ?

TIA

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**Author:** ![elisa.zoom](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/elisa.zoom/32/47836_2.png) [@elisa.zoom](https://devforum.zoom.us/u/elisa.zoom)\
**Post date:** [April 8, 2022, 2:01am UTC](https://devforum.zoom.us/t/zoom-response-reason-invalid-token-error-invalid-grant/67120/2 "2022-04-08T02:01:07Z")

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Hi @arnaud.sintes

Thanks for reaching out! I am happy to help here!  
It sounds like it could be a scope issue or something related to the way their account is set up.  
Feel free to open up a ticket with Developer Support, so you can share the account ID thats having this issue.

> **[Zoom Developer Support](https://devsupport.zoom.us/hc/en-us)**

Best,  
Elisa

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**Author:** ![munibmir91](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/munibmir91/32/40160_2.png) [@munibmir91](https://devforum.zoom.us/u/munibmir91)\
**Post date:** [August 4, 2022, 10:42am UTC](https://devforum.zoom.us/t/zoom-response-reason-invalid-token-error-invalid-grant/67120/3 "2022-08-04T10:42:48Z")

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If you are facing this issue on an un-published app then do check if your app is authorized. Few additional requirements were added few months back which forced my app into unpublished mode.