Is it possible to test the Orders / Payments API server-side without client-side authorization?

[fffwww]

As said in the title.
I want to test my client id and client secret on the server.

Therefor I thought of making a test order.

Is it possible to do this completly server-side with no client-side authoriziation?

I use the node sdk package.

https://github.com/paypal/Checkout-NodeJS-SDK