CHANGELOG
Discover the latest features, enhancements, and bug fixes that we've implemented to improve your Onepay experience.
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APRIL 22, 2026
New Developer Documentation Portal
DEVELOPER EXPERIENCE•DOCUMENTATION•
OnePay's new developer documentation portal is now live at docs.onepay.lk. The portal provides a complete, structured API reference and integration guide for all OnePay products: built for developers who need to move fast and integrate with confidence.
WHAT'S INCLUDED
- API Introduction: Core concepts, REST principles, base URL, response formats, API versioning, and rate limiting.
- Authentication Guide: SHA-256 hash-based signing for the Payment API and Access Token authentication for Card on File and Payment Link APIs.
- Error & Status Code Reference: Structured error handling reference for all endpoints.
- Payment API (Redirection): Full reference for the original redirect-based checkout flow.
- Items Management API: Create and manage payment items for structured checkout experiences.
- Payment Link API: Full reference for programmatic payment link generation.
- Card on File API: Full reference for tokenization and automated charging.
- Sandbox & Test Cards: Test card details for integration testing before going live.
- Plugin Documentation: Step-by-step integration guides for WordPress, Shopify, WHMCS, Zoho, and Flutter.