# Could not verify access credential

**URL:** <https://forums.nylas.com/t/could-not-verify-access-credential/128>\
**Category:** Question and Answers\
**Created:** [March 12, 2024, 11:01pm UTC](https://forums.nylas.com/t/could-not-verify-access-credential/128 "2024-03-12T23:01:08Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![div-nicestai](https://avatars.discourse-cdn.com/v4/letter/d/cdc98d/32.png) [@div-nicestai](https://forums.nylas.com/u/div-nicestai)\
**Post date:** [March 12, 2024, 11:01pm UTC](https://forums.nylas.com/t/could-not-verify-access-credential/128/1 "2024-03-12T23:01:08Z")

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First time user of this platform; I setup a sandbox app, generated an API key, added a grant successfully and then called, using postman, [https://api.us.nylas.com/v3/grants](https://api.us.nylas.com/v3/grants) or any other API, it keeps throwing this error. Any ideas?

{  
“success”: false,  
“error”: {  
“type”: “invalid\_request\_error”,  
“message”: “Could not verify access credential.”  
}  
}

I made sure the IDs all correct, the regions are the same.

Any help would be greatly appreciated.

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**Author:** ![Blag](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.nylas.com/blag/32/9_2.png) [@Blag](https://forums.nylas.com/u/Blag)\
**Post date:** [March 13, 2024, 9:50am UTC](https://forums.nylas.com/t/could-not-verify-access-credential/128/2 "2024-03-13T09:50:27Z")

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Hello @div-nicestai,

Make sure you’re using the right API Key, which is 71 characters long and start with **nyk\_**

I would recommend you to delete your current key and create a new one. Save the API Key because there’s no way to retrieve it other than creating a new key…

 ![image](https://us1.discourse-cdn.com/flex015/uploads/nylas3/original/1X/06d1e7d0d3a825192aacbce43c11fcf8c42512cb.png)

Let me know if that helps 🙂

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<div class="post-metadata">

**Author:** ![div-nicestai](https://avatars.discourse-cdn.com/v4/letter/d/cdc98d/32.png) [@div-nicestai](https://forums.nylas.com/u/div-nicestai)\
**Post date:** [March 13, 2024, 10:50am UTC](https://forums.nylas.com/t/could-not-verify-access-credential/128/3 "2024-03-13T10:50:05Z")

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Exactly what it was, thank you.

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<div class="post-metadata">

**Author:** ![Blag](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.nylas.com/blag/32/9_2.png) [@Blag](https://forums.nylas.com/u/Blag)\
**Post date:** [March 13, 2024, 11:03am UTC](https://forums.nylas.com/t/could-not-verify-access-credential/128/4 "2024-03-13T11:03:23Z")

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Glad to hear and happy to help 😃