# Postman and Zoom api refresh token

**URL:** <https://devforum.zoom.us/t/postman-and-zoom-api-refresh-token/48003>\
**Category:** API and Webhooks\
**Created:** [April 15, 2021, 6:28am UTC](https://devforum.zoom.us/t/postman-and-zoom-api-refresh-token/48003 "2021-04-15T06:28:25Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![zoom01](https://avatars.discourse-cdn.com/v4/letter/z/c4cdca/32.png) [@zoom01](https://devforum.zoom.us/u/zoom01)\
**Post date:** [April 15, 2021, 6:28am UTC](https://devforum.zoom.us/t/postman-and-zoom-api-refresh-token/48003/1 "2021-04-15T06:28:25Z")

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**Description**

> **[OAuth 2.0 - Authorization - Documentation](https://marketplace.zoom.us/docs/guides/auth/oauth#refreshing)**
>
> OAuth with Zoom
> 
> The Zoom API uses OAuth 2.0 to authenticate and authorize users to make requests. To setup access credentials and request scopes for yo...

I followed the document above to try refresh token with Postman. The setting is below, and please kindly see the attached.

 ![refresh_token](https://us1.discourse-cdn.com/flex016/uploads/zoomdeveloper/original/3X/a/6/a6917e968950cb4af6e87a0a79f92bcd7047720f.png)

Method:  
POST

Url:  
[https://zoom.us/oauth/token?grant\_type=refresh\_token&refresh\_token=eyJhb~~~](https://zoom.us/oauth/token?grant_type=refresh_token&refresh_token=eyJhb~~~)

Header:  
“Authorization” : “Basic RjRGN ~~~~ NQ==”

But got following error.

**Error**  
{  
“reason”: “Internal Error”,  
“error”: “invalid\_request”  
}

**Which App Type (OAuth / Chatbot / JWT / Webhook)?**  
OAuth

Does anyone have any ideas?

Thanks in advance,  
Ying

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**Author:** ![will.zoom](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/will.zoom/32/14417_2.png) [@will.zoom](https://devforum.zoom.us/u/will.zoom)\
**Post date:** [April 15, 2021, 3:29pm UTC](https://devforum.zoom.us/t/postman-and-zoom-api-refresh-token/48003/2 "2021-04-15T15:29:03Z")

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Hi @zoom01,

Thanks for reaching out about this. A few things to double check:

- Make sure you’re using a valid refresh token (refresh tokens are valid once, and you need to make sure you’re using the latest refresh token that was returned when you originally requested an access\_token)
- Ensure that the Client ID:Client Secret are base 64 encoded and match the app you retrieved the access\_token for originally
- Try reauthorizing the app and starting with a fresh access\_token and refresh\_token pair

Let me know if this helps—thanks!  
Will

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<div class="post-metadata">

**Author:** ![zoom01](https://avatars.discourse-cdn.com/v4/letter/z/c4cdca/32.png) [@zoom01](https://devforum.zoom.us/u/zoom01)\
**Post date:** [April 16, 2021, 2:56am UTC](https://devforum.zoom.us/t/postman-and-zoom-api-refresh-token/48003/3 "2021-04-16T02:56:14Z")

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> [@will.zoom](#):
>
> - Make sure you’re using a valid refresh token (refresh tokens are valid once, and you need to make sure you’re using the latest refresh token that was returned when you originally requested an access\_token)
> - Ensure that the Client ID:Client Secret are base 64 encoded and match the app you retrieved the access\_token for originally
> - Try reauthorizing the app and starting with a fresh access\_token and refresh\_token pair

Hi Will,  
Thanks a lot. I will try to double check those what you mentioned and see how it goes.

Thanks,  
Ying

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<div class="post-metadata">

**Author:** ![will.zoom](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/will.zoom/32/14417_2.png) [@will.zoom](https://devforum.zoom.us/u/will.zoom)\
**Post date:** [April 16, 2021, 3:16pm UTC](https://devforum.zoom.us/t/postman-and-zoom-api-refresh-token/48003/4 "2021-04-16T15:16:22Z")

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Thanks, @zoom01! Let us know how it goes. 🙂

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<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/flex016/uploads/zoomdeveloper/original/3X/6/1/614bdd549b610bbaa46ff934617683a02bdaa03c.png) [@system](https://devforum.zoom.us/u/system)\
**Post date:** [May 17, 2021, 1:17am UTC](https://devforum.zoom.us/t/postman-and-zoom-api-refresh-token/48003/5 "2021-05-17T01:17:08Z")

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