Katu9 API

Welcome to the Katu9 API reference documentation. This API provides programmatic access to Katu9's payment processing platform, enabling developers to integrate payment functionality into their applications.

Overview

The Katu9 API follows REST principles and uses standard HTTP methods with JSON-encoded requests and responses. The API is designed for developers who want to:

• Process payment transactions
• Manage payment lifecycles
• Track transaction status
• Implement financial operations in their applications

All API requests are made to endpoints beginning with https://api.katu9.com.

API Design Principles

The Katu9 API is designed with the following principles:

• Consistency: All endpoints follow consistent patterns for requests and responses
• Idempotency: Key operations can be retried safely without causing duplicate transactions
• Comprehensive error handling: Detailed error responses to help diagnose issues
• Rate limiting: API calls are rate-limited to ensure service reliability

Technical Requirements

• All requests must use HTTPS
• JSON is required for both request and response bodies
• UTF-8 encoding is required for all text
• Dates and times are in ISO 8601 format
• Currency values are handled as strings to prevent floating-point precision issues