What details do I need to connect Stripe?

With the Online Payments plugin active, tick Stripe in the Payment Gateways box and click Save gateways. Then click Configure on its row:

1. Enter the Test Publishable Key and Test Secret Key, and the Live Publishable Key and Live Secret Key, from Stripe's Developers → API keys page.
2. Choose Live / Sandbox.
3. Pick your Supported Currency values. Stripe supports USD, INR, EUR, GBP, AUD, CAD and SGD here.
4. Add a webhook in Stripe for the checkout.session.completed event, and paste its signing secret into Webhook Secret. The form says optional, but without it Stripe payments never move the order out of Pending. The webhook URL isn't shown on the page, so ask WCart support for it.
5. Set Status to Active and click Submit.

At checkout, customers go to Stripe's own secure payment page and come back to your store's thank-you page afterwards.