Please follow these steps below to get your API Username, API Password and Signature required to integrate PayPal to your Studio Ninja account. 

The first thing you will need to do (if you haven't already) is go to and setup a Business Account.

Once your Business Account is active, please follow the steps below:

Step 1: In the main menu > click 'Profile > click 'Profile and settings'

Step 2: Click on 'Selling tools'

Step 3: Look for the API access row, and then click 'Update'

Step 4: Scroll down and click on 'Manage API Credentials'

Step 5: This is where you will find the credentials that Studio Ninja needs to link PayPal to your Studio Ninja account. 

You will need to copy these details over into your Studio Ninja account in Settings > Payment Methods and click 'Activate' in the PayPal box:

  • API Username
  • API Password
  • Signature

Congratulations, you've activated PayPal in your Studio Ninja account. Now your clients will be able to pay your invoices online using credit card. A new 'Pay by PayPal' button will appear on all your invoice. 

Another option of taking credit card payment online is to integrate with Stripe (instead of PayPal). 

The difference is that Stripe has lower fees and the client experience is more streamlined because they make payments straight from the client portal rather than being redirected to PayPal. 

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