{"ok":true,"requirement":{"rail":"stripe","mode":"demo_checkout_manifest","currency":"usd","amount_cents":19900,"amount_usd":199,"product":"Ventru Action Capsule API Credit","purpose":"verified_checkout","checkout_session_endpoint":"https://www.ventru.net/api/stripe/checkout-session","quote_endpoint":"https://www.ventru.net/api/stripe/quote","success_url":"https://www.ventru.net/?stripe=success","cancel_url":"https://www.ventru.net/?stripe=cancel","payment_link":"https://buy.stripe.com/ventru-demo-action-capsule","receipt_header":"X-STRIPE-SESSION","settlement":"demo returns checkout_url; production verifies Stripe checkout.session.completed webhook before granting paid capabilities"}}