Before accepting payments via Booksure into your Paypal account, you must first have an existing Paypal Premier, Business or Website Payments Pro account.
You will need to map your Paypal configuration from within your Booksure dashboard.   To do this, log onto your Booksure dashboard, click on the Settings menu and select click on the Payment Gateways.

Under the PayPal heading, click on the 'Setup' button.

A popup window will open where you will be required to enter your PayPal account information.  The API information that is required can be found in your Paypal Account.  Log into your Paypal Account and click on the Profile link on the top menu.  Click on the My Selling Tools that appears in the menu panel on the left hand side.

Selling Tools
Look underneath the Selling Online header for the API Access information and click on Update as shown below.

You will be navigated to the next page where you need to click on the View API signature link.

View API Signature
Your Paypal API details that need to be mapped in Booksure can be found here.  Please make sure that the currency that is defined in Booksure matches the currency in which your Paypal account is configured.
API Details