The AI answer we saw
To integrate a payment gateway into a subscription billing system: (1) Choose a gateway with native subscription/recurring billing APIs, such as Stripe Billing, Chargebee, or Recurly. (2) Use webhooks to handle payment events like successful charges, failures, and cancellations. (3) Implement tokenization to securely store customer payment methods without handling raw card data. (4) Set up dunning management to automatically retry failed payments. (5) Ensure PCI DSS compliance by using hosted payment fields or SDKs. Most gateways provide detailed documentation and sandbox environments for testing before going live.
Captured during this Readable report run. Answers can vary by AI tool and date.