What username / password / signature should I use for the PayPal sandbox?

Question

I am trying to return transactions using the Paypal NVP API. I have some payments in my account in the form of a sandbox, but when I try to return a refund, I get an API You do not have permissions to make this API call. But I'm not sure which credentials I should use.

According to the documentation , it says:

To access the PayPal API, you need the API credentials, or an API signature or API certificate that identifies you. Use the following sample API signature and password in your sample programs that run in the Sandbox test environment in PayPal.

API username sdk-three_api1.sdk.com
API password QFZCWN5HZM8VBG7Q
API signature A‑IzJhZZjhg29XQ2qnhapuwxIDzyAZQ92FRP5dqBzVesOkzbdUONzmOU

I tried creating an API credential for a sandbox seller account that issued a refund, but the Paypal site crashes every time I try. Are they the correct credentials? What do I need to do to verify this?

Answer 1

Your test accounts do not have credentials.

To start working with a Payment card in the Sandbox, you must first create a test customer account and enable verification in the store.

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Answer 2

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