API Reference
API Reference
Overview, interactive endpoint docs, and the downloadable OpenAPI specification for the OMPAY Payment Gateway API.
API Reference
The OMPAY Payment Gateway API is organized around REST. All endpoints return JSON and use standard HTTP response codes.
Base URLs
| Environment | Base URL |
|---|---|
| UAT or Sandbox | https://api.uat.gateway.ompay.com |
| Production | https://api.gateway.ompay.com |
Authentication
All endpoints require authentication. See the Authentication guide for details on obtaining credentials and generating signatures.
Endpoint Groups
Bank Hosted
Redirect-based checkout flows where OMPAY handles the payment page.
Merchant Hosted
Server-to-server integrations with encrypted card data and full checkout control.