iyzico Payment Gateway Node.js Client

iyzipay is the official Node.js client for the iyzico payment gateway, used for processing online payments primarily in Turkey. Version 2.0.67 is the latest stable release, with frequent updates (many releases per year) and long-term support for Node.js v0.10.0+. It supports all iyzico API features including payment creation, recurring billing, refunds, and 3D secure. Key differentiators vs alternative Turkish payment libraries include official maintenance by iyzico, broad coverage of iyzico API endpoints, and built-in support for sandbox and production environments. The package uses callbacks, not Promises or async/await, and configures credentials either via constructor options or environment variables.