A Developer's Guide: How to Integrate a Payment Gateway Into a Website

Online payment integration requires implementing a secure multi-step process involving payment gateways, tokenization, and proper handling of sensitive financial data through various methods like hosted pages, direct API calls, or client-side SDKs. The technical process includes setting up merchant accounts with API keys, creating secure checkout forms with iframe-protected payment fields, processing tokenized payments through backend servers, and implementing webhooks for real-time transaction updates.