Add payment capabilities to your application with Stripe

Prerequisites: connected Supabase project and Stripe account. Store your Stripe API key via 'Add API Key'—Lovable accepts Stripe secret keys (sk_test_... / sk_live_...) and restricted keys (rk_test_... / rk_live_...). Never paste it in chat. Prompt Lovable to add checkout and subscription features, then click Apply to deploy Edge Functions.