API Request
To make a REST API request, you combine the HTTP GET and POST method, the URL to the API service.
The URL to the API service is either:
Demo: https://demo.vnpay333.com
Most GET and POST calls require a JSON request body.
HTTP request headers
The commonly used HTTP request headers are:
Accept
The response format, which is required for operations with a response body. The syntax is:
Accept: application/json
Content Type
The request format, which is required for operations with a request body. The syntax is:
Content-Type: application/json