My e-commerce store is up and running, but at the moment customers can’t complete a purchase because no payment solution is connected. I need the gateway selected, fully integrated, and live so visitors can buy without friction. Current status • Store front-end and cart are already functional • No payment method is configured yet • The site is hosted on a standard HTTPS environment with API access available Scope of work • Recommend a mainstream gateway that matches my region and currency (Stripe, PayPal, Razorpay or a comparable option) • Configure API keys, webhooks and callback URLs in both test and live modes • Map successful, failed and cancelled payment responses to my existing order workflow • Make sure checkout pages stay on-brand and responsive • Run end-to-end test transactions and show logs for verification • Provide a short hand-off note so I can update keys or toggle sandbox/live myself in future Acceptance criteria 1. A shopper can place a real transaction on the live site and the order status updates automatically. 2. All sensitive data passes through the provider’s secure flow; no card details touch my server. 3. Error messages are clear and styled consistently with the site. 4. You supply a quick-start guide (Markdown or PDF) summarising keys, webhooks, and steps to switch environments. While the immediate priority is payment gateway integration, I’m open to ongoing maintenance or troubleshooting once checkout is stable, so feel free to keep that in mind as we wrap up this task.