NVP/SOAP API integration (Classic) >> Manage API Credentials
Make sure the box is checked for API signature, select Agree and Submit
You are going to need to copy the API Username, password, and signature
Once that's done, go back to your Simplero account and set up PayPal in your Payment Processors.
Select Settings from your Simplero Dashboard
Select the Payment Processors tab
Click the Add a new payment processor button on the top right corner
Scroll to the PayPal box and click the Add PayPal button
Scroll down to the Credentials section and paste in the API signature and password. Also enter your Paypal email.
Complete the rest of the fields on this screen and click the Create payment processor button to save
This is our best understanding at the time we wrote this. PayPal may change things, so let us know if you see something different!
Note!'Encrypted Website Payments' needs to be disabled in Paypal for it to work in Simplero. You can find the setting in Paypal under settings - Website payments - Website preferences.