I need my existing Stripe checkout to pull live shipping quotes so customers see the exact cost before they pay. All of my products are small items—think jewelry-sized packages—so dimension and weight tables will be straightforward. Rates must come from UPS and the USPS, and the figures have to adjust automatically for both domestic and international addresses. The workflow I have in mind: • Customer enters their delivery details in Stripe Checkout. • Your code calls the relevant carrier API (UPS or USPS) in real time, returning the lowest available service that meets my handling time. • The returned cost populates the “Shipping” line in Stripe, gets added to the order total, and is stored in the payment metadata for later fulfillment. Please build the integration with the official Stripe API (webhooks where necessary) and carrier-approved endpoints, not third-party plug-ins. After deployment I’ll need brief instructions on how to add or change package dimensions and service preferences on my end. Acceptance criteria: • Accurate live quotes for domestic and international addresses. • Clear fallback logic if the carrier API is temporarily unavailable. • End-to-end test proving the correct amount is charged and recorded in Stripe. Let me know the estimated timeline and any additional details you require to connect to my carrier accounts.