# Error: Could not complete OAuth 2.0 token request

**URL:** <https://community.postman.com/t/error-could-not-complete-oauth-2-0-token-request/84668>\
**Category:** Help Hub\
**Tags:** authentication\
**Created:** [September 13, 2025, 6:41pm UTC](https://community.postman.com/t/error-could-not-complete-oauth-2-0-token-request/84668 "2025-09-13T18:41:01Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![kiranpanchavati1](https://sea2.discourse-cdn.com/getpostman/user_avatar/community.postman.com/kiranpanchavati1/32/33517_2.png) [@kiranpanchavati1](https://community.postman.com/u/kiranpanchavati1)\
**Post date:** [September 13, 2025, 6:41pm UTC](https://community.postman.com/t/error-could-not-complete-oauth-2-0-token-request/84668/1 "2025-09-13T18:41:01Z")

</div>

Hello Team,

I am getting the below error, Can anyone help me on this ?

 ![Screenshot 2025-09-13 at 10.40.21 PM](https://us1.discourse-cdn.com/getpostman/original/3X/a/9/a9c42cb2a41d341b1f2bdb7a18680120343fb22e.png)

Error: Could not complete OAuth 2.0 token request

{

```
"error": {

```

“code”: 401,

“message”: “Request had invalid authentication credentials. Expected OAuth 2 access token, login cookie or other valid authentication credential. See [https://developers.google.com/identity/sign-in/web/devconsole-project.](https://developers.google.com/identity/sign-in/web/devconsole-project.)”,

“errors”: [

{

“message”: “Invalid Credentials”,

“domain”: “global”,

“reason”: “authError”,

“location”: “Authorization”,

“locationType”: “header”

}

],

“status”: “UNAUTHENTICATED”

}

}

---

<div class="post-metadata">

**Author:** ![michaelderekjones](https://sea2.discourse-cdn.com/getpostman/user_avatar/community.postman.com/michaelderekjones/32/14819_2.png) [@michaelderekjones](https://community.postman.com/u/michaelderekjones)\
**Post date:** [September 14, 2025, 2:44pm UTC](https://community.postman.com/t/error-could-not-complete-oauth-2-0-token-request/84668/2 "2025-09-14T14:44:08Z")

</div>

Would you mind sharing the link to the API documentation you’re using? I’m especially looking for the section that explains how OAuth should be set up—like which flow is being used (e.g. client credentials or authorization code), and what details are needed for the configuration.

Also, could you send over a screenshot or link to the Auth settings you’ve set up in Postman (with any sensitive info blurred or removed)? That way, we can double-check that everything lines up with the API spec.

Thanks a bunch!