Request for Access token of Sandbox via Postman gets 401 Unauthorized

[MMM_Rahul]

I am trying to get access token of PayPal Sandbox environment using Postman.

URL: https://api-m.sandbox.paypal.com/v1/oauth2/token

POST

Auth: Basic Auth (with Sandbox user credentials)

Body: x-www-form-urlencoded and added key, value = grant_type, client_credentials

After clicking send I am getting 401 Unauthorized response although I can login to https://www.sandbox.paypal.com using same credentials that I used in Basic auth.

{

"error": "invalid_client",

"error_description": "Client Authentication failed"

}

[MTS_Jennifer · Accepted solution]

Hello,

Thank you for posting to the PayPal Sandbox Community.

The issue may be credentials you are using. This is what I use when I'm testing in Sandbox on Postman:

Post to Endpoint: https://api.sandbox.paypal.com/v1/oauth2/token

Authorization is Basic Auth

You can obtain your Client ID and Client Secret from logging into the developer dashboard at https://developer.paypal.com

Here are the specific instructions for creating a Rest APP and obtaining your Sandbox Client ID and Client Secret:

https://developer.paypal.com/docs/api/overview/#get-credentials

User name is your Sandbox Client ID

Password is your Sandbox Client Secret

Body:

 x-www-form-urlencoded

Key: grant_type Value: client_credentials

Thank you,

Jennifer

PayPal