N-Genius Online REST JSON APIs
🧭 Direct API Overview
Welcome to the N-Genius Online Direct API Integration section. Here, you'll find all the tools, steps, and support needed to integrate our robust RESTful JSON APIs into your environment.
N-Genius Direct API Flow – From authentication to refunds, this flowchart outlines the typical integration journey for merchants seeking full control over their checkout experience.
Our Direct API is ideal for merchants and partners seeking full control over their payment experience — including support for Tokenization, 3-D Secure, refunds, reversals, and more.
Note: Direct API integration requires PCI-DSS compliance since it involves directly capturing and transmitting sensitive card data.
🗺️ Get Started Quickly
Jump to the most commonly used endpoints and flows:
- 🔐 Request Access Token
- 💳 One-Stage Payments (PURCHASE)
- 🔄 Two-Stage Payments (AUTH + CAPTURE)
- 🔎 Retrieve Order Status
- 🔁 Refund a Capture
- 🧩 EMV 3DS Integration Guide (with interactive Recipe)
🧪 Postman Collection
To accelerate your integration:
- Download the N-Genius Online Direct API Postman collection.
- Includes preconfigured headers, requests, dynamic variables, and test responses
- Import it to get started in minutes!
🛠️ Developer Tools
- 📊 Status Codes and State Transitions Guide
- 📘 Full API Reference
- 📥 Sandbox vs Production Configuration Tips
🚀 Quick Note on Recipes
Use our step-by-step Recipes embedded throughout the site for key flows like EMV 3DS Authentication and Two-Stage Payments — designed to reduce errors and simplify onboarding.