First you need to allow the plugin to start receiving payments from your clients. Just click on the Settings tab and make sure the Booking Type option is set to “Paid Bookings”.
VERY IMPORTANT: Your website needs SSL, this means that your website URL should look like https:// otherwise the Bookings will not be confirmed and the email notifications won’t be sent to staff members, admin and clients.
Create or Login to your Stripe account here https://stripe.com/
Once you have logged in to your Stripe account click on Developers – API link.
You will need these API keys, just login to your WP Dashboard as administrator. Then, click on Payment Gateways link, then scroll down to the Stripe section.
At the right side you will see the Payment Gateways options. Click on Activate Stripe checkbox. Fill out the API fields by using the API keys created on Stripe.